- A fluorescent probe for the 3′-overhang of telomeric DNA based on competition between two interstrand G-quadruplexes
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A 6-mer oligonucleotide containing a fluorescent BodU moiety has been used as a novel fluorescent probe for the 3′-overhang of telomeric DNA based on competition between non-fluorescent tetramolecular and fluorescent (3+1) intermolecular G-quad
- Kim, Ki Tae,Kim, Byeang Hyean
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Read Online
- Expanded Cyclotetrabenzoins
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Cyclobenzoins are shape-persistent macrocycles of interest in the preparation of optoelectronic and porous materials. New cyclotetrabenzoins derived from biphenyl, naphthalene, and tolane skeletons were synthesized using N-heterocyclic carbene-catalyzed b
- Eisterhold, Andrew M.,Puangsamlee, Thamon,Otterbach, Steffen,Br?se, Stefan,Weis, Patrick,Wang, Xiqu,Kutonova, Ksenia V.,Miljani?, Ognjen ?.
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Read Online
- Synthesis, characterization, electrochemistry and photophysical studies of rhenium(I) tricarbonyl diimine complexes with carboxaldehyde alkynyl ligands Dedicated to Professor Claude Lapinte for his contribution to organometallic chemistry.
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A class of rhenium(I) tricarbonyl diimine complexes with carboxaldehyde alkynyl ligands, [Re(CO)3(N^N)(CC-C6H4-CHO)] (N^N = α,α′-diimine ligand), has been successfully synthesized and characterized, and the X-ray crystal structure of one of the complexes has been determined. Electrochemical and photophysical studies have been performed to study the effect of the variation of the diimine ligand on the redox and optical properties of the rhenium(I) complexes.
- Lam, Siu-Tung,Zhu, Nianyong,Au, Vonika Ka-Man,Yam, Vivian Wing-Wah
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- Trans-substituted porphyrin building blocks bearing iodo and ethynyl groups for applications in bioorganic and materials chemistry
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The modular synthesis of linear or cyclic multiporphyrin arrays relies on the availability of trans-substituted porphyrin building blocks with high solubility in organic solvents. Eleven porphyrin building blocks were synthesized bearing iodo, ethynyl, an
- Ravikanth,Strachan, Jon-Paul,Li, Feirong,Lindsey, Jonathan S.
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Read Online
- Ionic liquids enhanced alkynyl schiff bases derivatives of fipronil synthesis and their cytotoxicity studies
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To obtain highly selective toxic derivatives of fipronil, a series of Schiff bases with an alkynyl group (3a–3k) were designed and synthesized from 4-ethynylbenzaldehyde (2) and 4-substituted 5-amino-N-arylpyrazole (1a–1k) via a nucleophilic addition elim
- Liu, Xiu,Huang, Linya,Chen, Hongjun,Li, Na,Yan, Chao,Jin, Chenzhong,Xu, Hanhong
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Read Online
- Efficient deprotection of F-BODIPY derivatives: Removal of BF2 using bronsted acids
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The effective and efficient removal of the BF2 moiety from F-BODIPY derivatives has been achieved using two common Bronsted acids; treatment with trifluoroacetic acid (TFA) or methanolic hydrogen chloride (HCl) followed by work-up with Ambersep
- Yu, Mingfeng,Wong, Joseph K.-H.,Tang, Cyril,Turner, Peter,Todd, Matthew H.,Rutledge, Peter J.
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- Helical poly(phenylacetylene)s containing schiff-base and amino groups: Synthesis, secondary structures, and responsiveness to benzoic acid
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Novel acetylenic monomers containing Schiff-base and amino groups, (S)-N-(4-ethynylbenzylidene)-1-phenylethanamine (1a), (R)-N-(4- ethynylbenzylidene)-1-phenylethanamine (1b), N-(4-ethynylbenzylidene)-1- phenylethanamine (1c), (R)-N-(4-ethynylbenzyl)-1-ph
- Zhang, Yu,Gao, Keke,Zhao, Zhongfu,Yue, Dongmei,Hu, Yanming,Masuda, Toshio
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- A high-performance photoelectrochemical sensor for the specific detection of H2O2and glucose based on an organic conjugated microporous polymer
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Cathodic photoelectrochemical (PEC) biosensors are one of ideal systems for sensing applications owing to their advantages in the low-cost, simplicity of the detection and miniaturization of the sensors with high sensitivity and specificity. Herein, a high-performance PEC sensor based on a 2D porphyrin-phthalocyanine conjugated microporous polymer (PorPc-CMP) is reported for the specific detection of H2O2 and glucose in the wide linear ranges of 0.05-100 and 0.05-5000 μM with an ultra-low limit of detection (LOD) of 13 and 27 nM, respectively. All of them achieved the best levels, when compared to H2O2 and glucose tetrapyrrole-based photoelectrochemical sensors reported so far. After a comparative analysis on the morphology, optical-electrical properties and partial charge density plots by DFT calculations for the PorPc-CMP and its analogues (PorPor-CMP and PcPc-CMP), it is revealed that the high PEC-sensing performance of PorPc-CMP is largely related to the synergistic effect of unique multi-channel D-A structure and elaborate hollow tube-like morphology, which leads to the effective charge separation, enhanced charge transportability and high utilization of light irradiation. Furthermore, good accuracy of the PorPc-CMP PEC sensor was demonstrated in real sample analysis of H2O2 disinfectant and human serum samples. This journal is
- Chen, Yanli,Gao, Wen,Kong, Xia,Li, Xiyou,Liu, Qi,Liu, Xue,Shen, Jingshun,Sun, Qiqi,Xing, Chuanwang,Zhang, Yuexing
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supporting information
p. 26216 - 26225
(2021/12/13)
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- Combining photo-redox and enzyme catalysis for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives in one pot
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A novel strategy combining visible-light and enzyme catalysis in one pot for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives from alcohols is described for the first time. Fourteen 4H-pyrimido[2,1-b] benzothiazole derivatives were prepared with yields of up to 98% under mild reaction conditions by a simple operation. The photoorgano catalyst rose Bengal (rB) was employed to oxyfunctionalise alcohols to aldehydes. Compared with aldehydes, alcohols with more stable properties and lower cost, thus we used photocatalysis to oxidize alcohols into aldehydes. Next, the enzyme was used to further catalyze the reaction of Biginelli to produce the target product of 4H-pyrimidine [2,1-b] benzothiazole. Experimental results show that this method provides a more efficient and eco-friendly strategy for the synthesis of 4H-pyrimido[2,1-b] benzothiazole derivatives.
- Yu, Yuan,Lu, Wei-Fan,Yang, Zeng-Jie,Wang, Na,Yu, Xiao-Qi
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supporting information
(2020/12/25)
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- CONJUGATED OLIGOMER-BASED MACROCYCLES FOR LIVE CELL IMAGING
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A phenyleneethynylene macrocycle (PEMC) is constructed that is a cyclic or polycyclic oligo (oligophenyleneethynylene-co-polyamine) where a monodispersed oligophenyleneethynylene is coupled with a polyamine. The PEMC is formed by coupling a monodispersed di-aldehyde end-capped oligophenyleneethynylene with a polyamine to form a macrocyclic imine and reducing the imine to an amine. The PEMC is useful at entering living cells for the fluorescence imaging of the living cells without toxicity to the cells.
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Paragraph 0046-0047
(2020/12/29)
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- RET INHIBITORS, PHARMACEUTICAL COMPOSITIONS AND USES THEREOF
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Provided herein are a RET inhibitor, a pharmaceutical composition thereof and uses thereof. In particular, provided is a compound having Formula (I) or a stereoisomer, a geometric isomer, a tautomer, an N-oxide, a solvate, a metabolite, a pharmaceutically acceptable salt or a prodrug thereof. Provided is a pharmaceutical composition comprising the compound, and uses of the compound and pharmaceutical composition thereof for the preparation of a medicament, in particular for treatment and prevention of RET-related diseases and conditions, including cancer, irritable bowel syndrome, and/or pain associated with irritable bowel syndrome.
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Paragraph 00324-00325
(2020/07/06)
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- RET INHIBITORS, PHARMACEUTICAL COMPOSITIONS AND USES THEREOF
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Provided herein are a RET inhibitor, a pharmaceutical composition thereof and uses thereof. In particular, provided is a compound having Formula (I) or a stereoisomer, a geometric isomer, a tautomer, an N-oxide, a solvate, a metabolite, a pharmaceutically acceptable salt or a prodrug thereof. Provided is a pharmaceutical composition comprising the compound, and uses of the compound and pharmaceutical composition thereof for the preparation of a medicament, in particular for treatment and prevention of RET-related diseases and conditions, including cancer, irritable bowel syndrome, and/or pain associated with irritable bowel syndrome.
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Paragraph 00230; 00323; 00560
(2020/07/05)
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- Tuning the Cell Uptake and Subcellular Distribution in BODIPY–Carboranyl Dyads: An Experimental and Theoretical Study
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A set of BODIPY-carboranyl dyads synthesized by a Sonogashira cross-coupling reaction, where different C-substituted ortho- and meta-carboranyl fragments have been linked to a BODIPY fluorophore is described. Chemical, photophysical and physicochemical an
- Labra-Vázquez, Pablo,Flores-Cruz, Ricardo,Galindo-Hernández, Aylin,Cabrera-González, Justo,Guzmán-Cedillo, Cristian,Jiménez-Sánchez, Arturo,Lacroix, Pascal G.,Santillan, Rosa,Farfán, Norberto,Nú?ez, Rosario
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supporting information
p. 16530 - 16540
(2020/10/30)
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- Bimodal Heterogeneous Functionality in Redox-Active Conjugated Microporous Polymer toward Electrocatalytic Oxygen Reduction and Photocatalytic Hydrogen Evolution
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The designing and development of heterogeneous catalysts for conversion of renewable energy to chemical energies by electrochemical as well as photochemical processes is at the forefront of energy research. In this work, two new donor–acceptor-based redox-active conjugated microporous polymers (CMPs) (TAPA-OPE-mix and TAPA-OPE-gly) are synthesized through Schiff base condensation reaction using a microwave synthesizer. Notably, the asymmetric and symmetric bola-amphiphilic nature of the OPE struts results in distinct nanostructuring and morphologies in the CMPs. Interestingly, both CMPs show impressive heterogeneous catalytic activity toward electrochemical O2 reduction and photocatalytic H2 evolution reactions, and therefore, act as bimodal electro- and photocatalytic porous organic materials. Furthermore, the redox-active property of the CMPs is exploited for in situ generation and stabilization of platinum nanoparticles (Pt), and these Pt@CMPs exhibit significantly enhanced photocatalytic activity.
- Singh, Ashish,Verma, Parul,Samanta, Debabrata,Singh, Tarandeep,Maji, Tapas Kumar
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supporting information
p. 3810 - 3817
(2020/03/11)
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- Flavonoid derivatives synthesis and anti-diabetic activities
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In high fat diet-induced obese mice, the flavonoid derivative of tiliroside, Fla-CN, has antihyperglycemic effects, can improve insulin sensitivity, ameliorate metabolic lipid disorders, and benefits certain disorders characterized by insulin resistance.
- Chen, Ying,Cheng, Feng-Bo,Wu, Xiao-Ran,Zhu, Wen,Liao, Jian-Wen,Jiang, Yue,Zhang, Chang,Niu, Wen-Yan,Yu, Yang,Duan, Hong-Quan,Qin, Nan
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- Phenyleneethynylene trimer-based rigid-flexible [2+2] macrocycles for nucleic acid labelling in live cells
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Fluorescent macromolecules were developed for intracellular labeling in live cells. Coupling rigid rod phenyleneethynylene trimers with flexible amphiphilic diamines via the imine-bond formation chemistry yielded rigid-flexible [2+2] macromolecules showing nucleic acid selectivity and nontoxicity in live cells.
- Moon, Joong Ho,Manandhar, Prakash,Torabi, Hooman,Rohman, Md Rumum,Mathivathanan, Logesh,Lee, Ka Hung,Irle, Stephan
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supporting information
p. 5930 - 5933
(2019/05/27)
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- Intersystem Crossing in Naphthalenediimide–Oxoverdazyl Dyads: Synthesis and Study of the Photophysical Properties
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Oxoverdazyl (Vz) radical units were covalently linked to the naphthalenediimide (NDI) chromophore to study the effect of the radical on the photophysical properties, especially the radical enhanced intersystem crossing (REISC), which is a promising approach to develop heavy-atom-free triplet photosensitizers. Rigid phenyl or ethynylphenyl linkers between the two moieties were used, thus REISC and formation of doublet (D1, total spin quantum number S=1/2) and quartet states (Q1, S=3/2) are anticipated. The photophysical properties of the dyads were studied with steady-state and femtosecond/nanosecond transient absorption (TA) spectroscopies and DFT computations. Femtosecond transient absorption spectra show a fast electron transfer (1→D0 decay, and the slow decay component (2.0 μs; 20 %) to the Q1→D0 ISC. DFT computations indicated ferromagnetic interactions between the radical and chromophore (J=0.07–0.13 eV). Reversible formation of the radical anion of the NDI moiety by photoreduction of the radical-NDI dyads in the presence of sacrificial electron donor triethanolamine (TEOA) is achieved. This work is useful for design of new triplet photosensitizers based on the REISC effect.
- Hussain, Mushraf,Taddei, Maria,Bussotti, Laura,Foggi, Paolo,Zhao, Jianzhang,Liu, Qingyun,Di Donato, Mariangela
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supporting information
p. 15615 - 15627
(2019/11/19)
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- Reticular Synthesis of Multinary Covalent Organic Frameworks
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Hexagonal hexaminophenyl benzene, tetragonal tetrakis(4-aminophenyl) ethane, and trigonal 1,3,5-tris(p-formylphenyl)benzene were all joined together by imine linkages to yield a 2D porous covalent organic framework with unprecedented tth topology, termed
- Zhang, Bing,Mao, Haiyan,Matheu, Roc,Reimer, Jeffrey A.,Alshmimri, Sultan A.,Alshihri, Saeed,Yaghi, Omar M.
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supporting information
p. 11420 - 11424
(2019/08/20)
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- Diboron-Assisted Copper-Catalyzed Z-Selective Semihydrogenation of Alkynes Using Ethanol as a Hydrogen Donor
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We herein describe a B2Pin2-assisted copper-catalyzed semihydrogenation of alkynes. A variety of alkenes were obtained in good to excellent yields with Z-selectivity under mild reaction conditions. Mechanistic studies indicated that a transfer hydrogenation process was involved and ethanol acted as both a solvent and a hydrogen donor in this reaction. The present protocol enabled convenient synthesis of deuterium-substituted Z-alkenes such as Z-Combretastain A4-d2 in a high deuteration ratio by using readily available ethanol-d1 as the deuterium source.
- Bao, Hanyang,Zhou, Bingwei,Jin, Hongwei,Liu, Yunkui
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p. 3579 - 3589
(2019/03/11)
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- Catalysis through Dynamic Spacer Installation of Multivariate Functionalities in Metal-Organic Frameworks
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We demonstrate herein a facile strategy to engineer versatile catalytically active coordination interspace in the same primitive metal-organic framework (MOF) for variable heterogeneous catalysis. Different functional ligands can be reversibly inserted into and removed from proto-LIFM-28 individually or successively to bring in single or binary catalytic sites for specific reactions and switch the parent MOF to multipurpose catalysts. Alcohol-oxidation, Knoevenagel-condensation, click, acetal, and Baylis-Hillman reactions are achievable through simple exchange of a single catalytic spacer, while sequential or stepwise reactions are designable via selective combination of two catalytic spacers with different functionalities, thus making proto-LIFM-28 a multivariate MOF for multiuse and economic catalysis.
- Cao, Chen-Chen,Chen, Cheng-Xia,Wei, Zhang-Wen,Qiu, Qian-Feng,Zhu, Neng-Xiu,Xiong, Yang-Yang,Jiang, Ji-Jun,Wang, Dawei,Su, Cheng-Yong
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supporting information
p. 2589 - 2593
(2019/03/04)
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- Naphthalene Diimides Prepared by a Straightforward Method and Their Characterization for Organic Electronics
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A new approach for the synthesis of acetylene-substituted naphthalene diimides in polar solvents with PdCl2, Et3N, and electrolytic copper powder was developed. This simplified approach allows for high-throughput synthesis, and the r
- Korzec, Mateusz,Kotowicz, Sonia,?aba, Katarzyna,?apkowski, Mieczys?aw,Ma?ecki, Jan Grzegorz,Smolarek, Karolina,Ma?kowski, Sebastian,Schab-Balcerzak, Ewa
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p. 1756 - 1760
(2018/04/27)
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- Facile preparation and investigation of the properties of single molecular POSS-based white-light-emitting hybrid materials using click chemistry
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Recently, organic white light emitting devices (OWLEDs) have attracted great interest in flexible displays and solid state lighting devices. Here we report a kind of novel POSS-based white-light-emitting single molecular nanohybrid (POSS-WLED), which was
- Zhao, Gang,Zhu, Yakun,Guang, Shanyi,Ke, Fuyou,Xu, Hongyao
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p. 555 - 563
(2017/12/28)
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- An Additive-Free, Base-Catalyzed Protodesilylation of Organosilanes
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We report an additive-free, base-catalyzed C-, N-, O-, and S-Si bond cleavage of various organosilanes in mild conditions. The novel catalyst system exhibits high efficiency and good functional group compatibility, providing the corresponding products in good to excellent yields with low catalyst loadings. Overall, this transition-metal-free process may offer a convenient and general alternative to current employing excess bases, strong acids, or metal-catalyzed systems for the protodesilylation of organosilanes.
- Yao, Wubing,Li, Rongrong,Jiang, Huajiang,Han, Deman
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p. 2250 - 2255
(2018/02/23)
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- Metallophthalocyanine-based redox active metal-organic conjugated microporous polymers for OER catalysis
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We report the design and synthesis of two Co2+ and Zn2+ phthalocyanine (PC)-based redox active metal-organic conjugated microporous polymers (MO-CMP), CoCMP and ZnCMP, respectively, obtained by a Schiff base condensation reaction. CoCMP, where Co2+ is stabilized by N4-coordination of PC, has shown stable and efficient electrocatalytic activity towards the OER with a low overpotential of 340 mV.
- Singh, Ashish,Roy, Syamantak,Das, Chayanika,Samanta, Debabrata,Maji, Tapas Kumar
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supporting information
p. 4465 - 4468
(2018/05/03)
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- Preparation method of terpyridyl zinc complex and application
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The invention discloses a preparation method of a terpyridyl zinc complex and application. The preparation method comprises the following steps: in a DMSO (Dimethylsulfoxide) solvent system, performing a substitution reaction on carbazole, bromohexane and a 50% sodium hydroxide solution at 50 DEG C; in a dichloromethane solvent system, performing a local selective bromination reaction on a compound 1 and NBS (N-Bromobutanimide) at 25 DEG C; in a nitrogen environment and in a dried diisopropylamine solution system, performing a Sonogashira coupling reaction on p-bromo benzaldehyde, trimethylsilylacetylene, copper iodide and (beta-4)-platinum at 80 DEG C; in a nitrogen environment and in a dried diisopropylamine and tetrahydrofuran solution system, performing a Sonogashira coupling reactionon a compound 2, a compound 3, copper iodide and (beta-4)-platinum at 80 DEG C; in an ethanol solvent system, performing a Krohnke middle ring formation method reaction on an alkyne-containing compound 4, diacyl pyridine and potassium hydroxide at 25 DEG C; stirring a terpyridyl compound and trifluoro zinc sulfonate in methanol. The preparation method is simple in step and gentle, and water printing of a product is achieved.
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Paragraph 0038; 0039
(2018/06/26)
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- Application of polymer microspheres to Raman detection
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The invention discloses application of polymer microspheres to Raman detection. Methacrylate/amide polymer monomers or styrene polymer monomers containing alkynyl, cyano, azido or a carbon-deuterium bond group are prepared into the polymer microspheres with the particle diameter from a nanometer grade to a micron grade through an emulsion polymerization or dispersion polymerization method; the polymer microspheres have a remarkable Raman signal under the condition of no metal sensitization structure; and a Raman characteristic peak signal is located in a Raman quiet zone (1800cm to 2800cm) in a living organism and can be used as a marker for biological imaging.
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Paragraph 0115; 0121-0123
(2018/03/13)
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- Synthesis of Phenalenyl-Fused Pyrylium Cations: Divergent C?H Activation/Annulation Reaction Sequence of Naphthalene Aldehydes with Alkynes
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Described herein is the synthesis of stable oxonium-doped polycyclic aromatic hydrocarbons (PAHs) by the rhodium-catalyzed C?H activation/annulations of naphthalene-type aldehydes with internal alkynes. This protocol provides four divergent reaction types, including two unexpected annulations with an oxygen transposition process, which lead to diverse types of phenalenyl-fused pyrylium cations comprising a four-, five-, or six-ring-fused π-conjugated core. The annulations exhibit an exquisite regioselectivity and a high tolerance of sensitive functional groups. These PAHs feature intriguing photophysical properties such as full-color tunable fluorescence emission, high quantum yield, and positively charged core, and can be reduced easily to the phenalenyl radicals.
- Yin, Jiangliang,Tan, Meiling,Wu, Di,Jiang, Ruyong,Li, Chengming,You, Jingsong
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supporting information
p. 13094 - 13098
(2017/09/18)
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- Synthesis of a Fragment of Crystalline Silicon: Poly(Cyclosilane)
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We report a strategic synthesis of poly(cyclosilane), a well-defined polymer inspired by crystalline silicon. The synthetic strategy relies on the design of a functionalized cyclohexasilane monomer for transition-metal-promoted dehydrocoupling polymerizat
- Press, Eric M.,Marro, Eric A.,Surampudi, Sravan K.,Siegler, Maxime A.,Tang, Joel A.,Klausen, Rebekka S.
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supporting information
p. 568 - 572
(2017/01/07)
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- SILICON BASED DRUG CONJUGATES AND METHODS OF USING SAME
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Described herein are silicon based conjugates capable of delivering one or more payload moieties to a target cell or tissue. Contemplated conjugates may include a silicon-heteroatom core, one or more optional catalytic moieties, a targeting moiety that permits accumulation of the conjugate within a target cell or tissue, one or more payload moieties (e.g., a therapeutic agent or imaging agent), and two or more non-interfering moieties covalently bound to the silicon-heteroatom core.
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Paragraph 0738; 0736; 0737
(2017/08/07)
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- Method of rapidly preparing rhodamine dye with a plurality of active functional groups under mild condition
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The invention relates to a method of rapidly preparing a rhodamine dye with a plurality of active functional groups under the mild condition and belongs to the technical field of fine chemicals. The method is used for synthesizing rhodamine with specific
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Paragraph 0065; 0066; 0067
(2017/09/01)
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- Synthesis, characterization and crystal structure of 4′-ethynylflavanone and its chalcone precursor
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The synthesis of (E)-4-ethynyl-2′-hydroxychalcone (7) and the 4′-ethynylflavanone (8), it's spectroscopic and X-ray characterization are described for both compounds. Products were prepared by reacting 4-bromobenzaldehyde (1) under Sonogashira coupling re
- Salinas-Ortega, Ismael,Ocayo, Fernanda,Santos, Juan C.,Trujillo, Alexander,Escobar, Carlos A.
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p. 361 - 367
(2016/09/14)
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- Solid state emissive organic fluorophores with remarkable broad color tunability based on aryl-substituted buta-1,3-diene as the central core
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Multicolor emissive organic solid fluorophores are scarcely observed because of molecular aggregation in the condensed phase. However, rational molecular design is crucial to develop solid state emissive fluorophores from a simple core skeleton. Herein, the development of a series of small molecular derivatives and a conjugated copolymer having a (1Z,3Z)-1,4-diphenyl-1,3-butadiene unit as the central core has been reported. Notably, all fluorophores are highly emissive in the solid state and the emission colors cover the whole visible region from blue to red. Colour tuning has been simply achieved by varying the substituents attached with the aryl group of the central core. In addition, a partially twisted structure of the central core helps to reduce the intramolecular interaction and improve the photophysical properties of the fluorophores. Furthermore, electrochemical measurements indicate that polymer based fluorophores are potential candidates for organic photovoltaic (OPV) applications.
- Bera, Manas Kumar,Chakraborty, Chanchal,Malik, Sudip
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supporting information
p. 6872 - 6879
(2017/07/22)
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- Dye sensitizer molecule taking triazole as core and preparation method of dye sensitizer molecule
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The invention discloses a dye sensitizer molecule taking triazole as a core and a preparation method of the dye sensitizer molecule. According to the dye molecule, a triazole ring is introduced to the design of a molecular structure, and the electronic ab
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Paragraph 0047-0049
(2017/08/18)
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- A Bis-Manganese(II)–DOTA Complex for Pulsed Dipolar Spectroscopy
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High-spin gadolinium(III) and manganese(II) complexes have emerged as alternatives to standard nitroxide radical spin labels for measuring nanometric distances by using pulsed electron–electron double resonance (PELDOR or DEER) at high fields/frequencies.
- Demay-Drouhard, Paul,Bertrand, Hélène C.,Policar, Clotilde,Ching, H. Y. Vincent,Tabares, Leandro C.,Akhmetzyanov, Dmitry,Guillot, Régis
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p. 2066 - 2078
(2016/08/27)
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- Synchronized Offset Stacking: A Concept for Growing Large-Domain and Highly Crystalline 2D Covalent Organic Frameworks
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Covalent organic frameworks (COFs), formed by reversible condensation of rigid organic building blocks, are crystalline and porous materials of great potential for catalysis and organic electronics. Particularly with a view of organic electronics, achievi
- Auras, Florian,Ascherl, Laura,Hakimioun, Amir H.,Margraf, Johannes T.,Hanusch, Fabian C.,Reuter, Stephan,Bessinger, Derya,D?blinger, Markus,Hettstedt, Christina,Karaghiosoff, Konstantin,Herbert, Simon,Knochel, Paul,Clark, Timothy,Bein, Thomas
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supporting information
p. 16703 - 16710
(2017/01/10)
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- An azine-linked hexaphenylbenzene based covalent organic framework
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In this communication, we report an azine linked covalent organic framework based on a six-fold symmetric hexphenylbenzene (HEX) monomer functionalized with aldehyde groups. HEX-COF 1 has an average pore size of 1 nm, a surface area in excess of 1200 msu
- Alahakoon, Sampath B.,Thompson, Christina M.,Nguyen, Amy X.,Occhialini, Gino,McCandless, Gregory T.,Smaldone, Ronald A.
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supporting information
p. 2843 - 2845
(2016/02/19)
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- Preparation of Bodipy-ferrocene dyads and modulation of the singlet/triplet excited state of bodipy: Via electron transfer and triplet energy transfer
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Modulation of the singlet/triplet excited state of a fluorophore is becoming more important for molecular switches, molecular memory devices, chemical or biological sensors and controllable photodynamic therapy (PDT) etc. Boron-dipyrromethene (Bodipy)-ferrocene (Fc) dyads were prepared for reversible electrochemical switching of the singlet excited state (fluorescence), as well as the triplet excited states of Bodipy. The photophysical properties of the dyads were studied using steady-state UV-vis absorption spectroscopy, fluorescence, electrochemical characterization, time-resolved fluorescence and nanosecond transient absorption spectroscopies. The fluorescence of the Bodipy moieties in the dyads was quenched significantly, due to the photo-induced electron transfer (PET). This conclusion was supported by electrochemical characterization and calculation of the Gibbs free energy changes of PET. We demonstrated that the fluorescence of the Bodipy moiety can be reversibly switched ON and OFF by electrochemical oxidation of the Fc moiety (Fc/Fc+). Furthermore, we proved that the Fc moiety is efficient for quenching of the triplet excited states of Bodipy. Two quenching mechanisms, PET and triplet-triplet-energy transfer (TTET), are responsible for the intramolecular and intermolecular quenching of the triplet excited states of the diiodoBodipy unit.
- Wu, Xueyan,Wu, Wenting,Cui, Xiaoneng,Zhao, Jianzhang,Wu, Mingbo
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supporting information
p. 2843 - 2853
(2016/04/26)
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- Synthesis and Characterization of New Conjugated Fluorenyl-Porphyrin Dendrimers for Optics
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A new family of conjugated meso-tetraphenylporphyrin-based dendrimers with four (TPP1, TPP2), eight (TPP3, TPP4, TPP5) and up to sixteen (TPP6) fluorenyl groups has been synthesized and fully characterized. These tetraphenylporphyrin-cored dendrimers pres
- Yao, Dandan,Zhang, Xu,Mongin, Olivier,Paul, Frédéric,Paul-Roth, Christine O.
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p. 5583 - 5597
(2016/04/20)
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- Synthesis, characterization and antimicrobial evaluation of novel (E)-N′-(4-(1-((3,4-dimethoxypyridin-2-yl)methyl)-1H-1,2,3-triazol-4-yl)benzylidene)benzohydrazide derivatives
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The synthesis of novel 1,2,3-triazole-hydrazone derivatives embedded with 3,4-dimethoxy pyridine ring nucleus is described. These derivatives were prepared utilizing, 2-(chloromethyl)-3,4-dimethoxypyridine 1, 4-ethynylbenzaldehye 5 and various benzohydrazides7a-7j. The structures of the newly synthesized 1,2,3-triazole-hydrazones 8a-j was established on the basis of the spectroscopic techniques like 1H NMR, mass and IR data. They were evaluated against a panel of bacterial and fungal pathogens such as Staphylococcus. pyogens, Staphylococcus. Aureus (Gram positive bacteria), Escherichia.coli, Pseudomonas. aeruginosa (Gram negative bacteria) and Aspergillus niger and Candida albicans (Fungal stains). Compounds 8b, 8c, 8d, 8e and 8f with R = 4-OH, 4-OMe, 4-SO2Me, 3,45,-OMe and 3-NO2 respectively showed moderate antibacterial activity while compounds 8b, 8d, 8i and 8j with R = 4-OH, 4-SO2Me, 3,5-dichloro and 2,5-difluoro substitution exhibited very good fungal activity.
- Saidugari, Swamy,Vadali, Lakshmana Rao,Vidya,Ram
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p. 2155 - 2161
(2016/10/24)
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- Method of manufacturing calbonyl compd.
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PROBLEM TO BE SOLVED: To provide a method of manufacturing a carbonyl compound by smoothly performing a dehydrogenation reaction while preventing side reactions.SOLUTION: A method of manufacturing a carbonyl compound includes a process of converting alcohol to aldehyde or ketone by irradiating visible light to a reaction system containing a primary alcohol or a secondary alcohol, SrTiOcarrying a Ru atom and doped with Rh atom, and water.
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Paragraph 0051; 0053
(2018/06/30)
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- Assessing dimerisation degree and cooperativity in a biomimetic small-molecule model by pulsed EPR
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Pulsed electron paramagnetic resonance (EPR) spectroscopy is gaining increasing importance as a complementary biophysical technique in structural biology. Here, we describe the synthesis, optimisation, and EPR titration studies of a spin-labelled terpyrid
- Ackermann,Giannoulis,Cordes,Slawin,Bode
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supporting information
p. 5257 - 5260
(2015/03/30)
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- Synthesis and ion responsiveness of optically active polyacetylenes containing salicylidene Schiff-base moieties
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Acetylenic monomers containing salicylidene Schiff-base groups (1a and 1b) as well as Schiff-base and hydroxy groups (1c) were synthesized and polymerized with [(nbd)RhCl]2/Et3N catalyst to afford the corresponding polymers 2a-c with
- Zhang, Chunyu,Zhang, Yu,Zhang, Hexin,Hu, Yanming,Zhang, Xuequan,Masuda, Toshio
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- Fluorogenic aldehydes bearing arylethynyl groups: Turn-on aldol reaction sensors for evaluation of organocatalysis in DMSO
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Fluorogenic aromatic aldehydes bearing arylethynyl groups were developed. They were used for monitoring the reaction progress of organocatalytic aldol reactions in DMSO through an increase in the fluorescence intensity based on the formation of the florescent aldol product. The ratios of the fluorescence intensities of the aldols to the aldehydes were more than 300. These results suggest that the fluorescence assay system using the aldehyde is useful for the rapid identification of superior aldol catalysts and reaction conditions.
- Mase, Nobuyuki,Ando, Taishi,Shibagaki, Fumiya,Sugita, Atsushi,Narumi, Tetsuo,Toda, Mitsuo,Watanabe, Naoharu,Tanaka, Fujie
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supporting information
p. 1946 - 1948
(2014/03/21)
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- Towards Rational Modulation of In-Plane Molecular Arrangements in Metal-Organic Framework Nanosheets
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A strategy to modulate the in-plane structural arrangement in preferentially oriented crystalline metal-organic framework (MOF) nanosheets assembled by a two-dimensional interfacial reaction between porphyrin units and metal ion linkers is reported. Start
- Makiura, Rie,Usui, Ryo,Sakai, Yuta,Nomoto, Akihiro,Ogawa, Akiya,Sakata, Osami,Fujiwara, Akihiko
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p. 1352 - 1360
(2016/02/18)
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- Broadband visible-light-harvesting trans-bis(alkylphosphine) platinum(II)-alkynyl complexes with singlet energy transfer between BODIPY and naphthalene diimide ligands
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A heteroleptic bis(tributylphosphine) platinum(II)-alkynyl complex (Pt-1) showing broadband visible-light absorption was prepared. Two different visible-light-absorbing ligands, that is, ethynylated boron-dipyrromethene (BODIPY) and a functionalized naphthalene diimide (NDI) were used in the molecule. Two reference complexes, Pt-2 and Pt-3, which contain only the NDI or BODIPY ligand, respectively, were also prepared. The coordinated BODIPY ligand shows absorption at 503 nm and fluorescence at 516 nm, whereas the coordinated NDI ligand absorbs at 594 nm; the spectral overlap between the two ligands ensures intramolecular resonance energy transfer in Pt-1, with BODIPY as the singlet energy donor and NDI as the energy acceptor. The complex shows strong absorption in the region 450 nm-640 nm, with molar absorption coefficient up to 88 000 m-1 cm-1. Longlived triplet excited states lifetimes were observed for Pt-1-Pt-3 (36.9 μs, 28.3 μs, and 818.6 μs, respectively). Singlet and triplet energy transfer processes were studied by the fluorescence/ phosphorescence excitation spectra, steady-state and time-resolved UV/Vis absorption and luminescence spectra, as well as nanosecond time-resolved transient difference absorption spectra. A triplet-state equilibrium was observed for Pt-1. The complexes were used as triplet photosensitizers for triplet-triplet annihilation upconversion, with upconversion quantum yields up to 18.4% being observed for Pt-1.
- Liu, Lianlian,Guo, Song,Ma, Jie,Xu, Kejing,Zhao, Jianzhang,Zhang, Tierui
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p. 14282 - 14295
(2015/02/05)
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- Bent molecules with a 60° central core angle that form B7 and B2 phases
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Small-angle bent-core liquid-crystalline (LC) molecules based on a 1,2-bis(phenylethynyl)benzene central core have been synthesized that form banana smectic phases with a ferroelectric B7-antiferroelectric B2 phase sequence upon cooling. The formation of
- Lee, Eun-Woo,Takimoto, Koji,Tokita, Masatoshi,Watanabe, Junji,Kang, Sungmin
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supporting information
p. 8216 - 8220
(2014/08/18)
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- Trans-Bis(alkylphosphine) platinum(ii)-alkynyl complexes showing broadband visible light absorption and long-lived triplet excited states
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Heteroleptic trans-bis(alkylphosphine) platinum(ii) bisacetylide complexes Pt-1 and Pt-2 were prepared to achieve broadband absorption of visible light. Two different ethynylBodipy ligands, 2-ethynylBodipy and 2,6-diethynylBodipy or 8-(4′-ethynylphenyl)Bodipy, were used in each complex. Each Bodipy ligand gives strong absorption in the visible spectral region, but at different wavelengths, thus broadband absorption in the visible spectral region was achieved for the Pt(ii) complexes (ε is up to 1.85 × 105 M-1 cm-1 in the region of 450-700 nm). Singlet energy transfer from the peripheral coordinated Bodipy to the central coordinated Bodipy (with 2,6-diethynyl substitution) was confirmed by steady state absorption/luminescence spectroscopy, fluorescence excitation spectroscopy and nanosecond/femtosecond ultrafast time-resolved transient absorption spectroscopy. Long-lived triplet excited states were observed for both complexes (τT = 63.13 μs for Pt-1 and τT = 94.18 μs for Pt-2). Nanosecond time-resolved transient absorption spectroscopy indicated that the triplet excited state of Pt-1 is distributed on both Bodipy units. For Pt-2, however, the T1 state is confined to the central coordinated Bodipy ligand. These complexes show high singlet oxygen (1O2) quantum yields (ΦΔ = 76.0%). With nanosecond pulsed laser excitation, delayed fluorescence was observed for the complexes (τDF = 43.8 μs for Pt-1 and τDF = 111.0 μs for Pt-2), which is rarely reported for transition metal complexes. The complexes were used as efficient multi-wavelength excitable triplet photosensitizers for triplet-triplet annihilation upconversion. This journal is
- Jia, Huiru,Küük?z, Betül,Xing, Yongheng,Majumdar, Poulomi,Zhang, Caishun,Karatay, Ahmet,Yaglioglu, Gul,Elmali, Ayhan,Zhao, Jianzhang,Hayvali, Mustafa
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p. 9720 - 9736
(2015/02/02)
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- D-π-A structured porphyrins for efficient dye-sensitized solar cells
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In this study, new push-pull alkoxy-wrapped zinc porphyrin dyes with intramolecular donor-π-acceptor structures have been designed and synthesized for dye-sensitized solar cells (DSCs). The linkers based on thiophene or 2,3-dihydrothieno[3,4-b][1,4] dioxine with cyanoacetic acid can broaden the spectral response of porphyrins into the near-IR region (~850 nm), which is mainly attributed to the cyanoacetic acid group. However, porphyrins with cyanoacrylic acid as an anchoring group lead to a faster charge recombination rate at the dye-sensitized heterojunction interface, which lowers the device photovoltaic performance. By using porphyrins with a rigid π-linker feature structure that is 5-ethynylthiophene-2-carboxylic acid, highly efficient DSC devices with a power conversion efficiency of 9.5% can be obtained. Spectral, electrochemical, photovoltage transient decay and impedance measurements are performed to reveal the influence of π-conjugated linkers and anchoring groups upon the optoelectronic features of porphyrin dyes in DSCs.
- Lu, Jianfeng,Xu, Xiaobao,Cao, Kun,Cui, Jin,Zhang, Yibo,Shen, Yan,Shi, Xiaobo,Liao, Liangsheng,Cheng, Yibing,Wang, Mingkui
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supporting information
p. 10008 - 10015
(2013/09/02)
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- Palladium-catalyzed trifluoroethylation of terminal alkynes with 1,1,1-trifluoro-2-iodoethane
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An efficient Csp-CH2CF3 bond-forming reaction via Pd-catalyzed 2,2,2-trifluoroethylation of aryl and alkyl terminal alkynes has been developed. This protocol proceeds under mild conditions using the readily available and cheap reagent CF3CH2I as the source of the CH2CF3 group. Various terminal aryl alkynes as well as alkylacetylenes can be transformed into the corresponding trifluoroethylated products in good-to-excellent yields. The method is tolerant of carbonyl, nitro, ester, cyano, and even formyl groups.
- Feng, Yi-Si,Xie, Chuan-Qi,Qiao, Wen-Long,Xu, Hua-Jian
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supporting information
p. 936 - 939
(2013/03/28)
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- A triazine-based multi-branched platinum acetylide complex: Synthesis and photophysical properties
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A triazine-based multi-branched platinum(II) acetylide complex was synthesized and fully characterized. The photophysical properties, electrochemical properties and first order hyperpolarizability were studied.
- Guo, Jin,Huang, Zhaohui,Wang, Tingfeng,Zhang, Liying,Shao, Junfeng,Guo, Fengqi
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- Rhodium-catalyzed chemo- and regioselective cross-dimerization of two terminal alkynes
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Cross-dimerization of terminal arylacetylenes and terminal propargylic alcohols/amides has been achieved in the presence of a rhodium catalyst. This method features high chemo- and regioselectivities rendering convenient and atom economical access to functionalized enynes.
- Xu, Hua-Dong,Zhang, Ren-Wei,Li, Xiaoxun,Huang, Suyu,Tang, Weiping,Hu, Wen-Hao
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supporting information
p. 840 - 843
(2013/03/29)
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