75867-39-9Relevant articles and documents
Photogenerated charge collection on diamond electrodes with covalently linked chromophore monolayers
Artemenko, A.,Cermák, J.,Haenen, K.,Kavan, L.,Kromka, A.,Krysova, H.,Lopez-Carballeira, D.,Maes, W.,Nicley, S. S.,Raymakers, J.,Rezek, B.,Verstraeten, F.
, (2020)
Encouraged by its rich surface chemistry and excellent electrochemical properties, boron-doped nanocrystalline diamond (B:NCD) is a promising p-type photoelectrode in dye-sensitized solar cells. One method of diamond surface functionalization using stable carbon-carbon bonds involves the electrochemical grafting of diazonium salts. However, this method typically leads to multilayers that may complicate the transport of photogenerated charges. Here, we establish functionalization of B:NCD electrodes by a monolayer of ethynylphenyl molecules using sterically hindered 4-(trimethylsilyl)ethynylbenzenediazonium tetrafluoroborate. Both the density and structural orientation of the grafted layer are investigated by angular resolved X-ray photoelectron spectroscopy, confirming the presence of covalently grafted monolayers. After removal of the trimethylsilyl protective groups, the resulting ethynyl functionalities are employed to immobilize organic donor-acceptor chromophores via Sonogashira cross-coupling reactions. Homogenous surface coverage is achieved even on the B:NCD electrode. Atomic scale DFT computing reveals that for the chromophore with the strongest acceptor unit, efficient charge separation of 20 ? is obtained where photogenerated holes move directly into diamond. Yet, photocurrent and photovoltage measurements suggest competitive electron recombination to the diamond electrode via the redox electrolyte. Correlation between the density of the molecular layer and photocurrents/photovoltage provides better understanding of the charge generation and recombination pathways in diamond-organic photoelectrochemical cells.
Synthesis, characterization, photophysics, and anion binding properties of gold(i) acetylide complexes with amide groups
Shi, Hua-Yun,Qi, Jie,Zhao, Zhen-Ze,Feng, Wen-Juan,Li, Yu-Hao,Sun, Lu,Lin, Zhuo-Jia,Chao, Hsiu-Yi
, p. 6168 - 6175 (2014)
A series of mononuclear gold(i) acetylide complexes with amide groups, Ph3PAuCCC6H4NHC(O)C6H4-R-4 (R = NO2 (3a), CF3 (3b), H (3c), and OMe (3d)), has been synthesized and characterized. The crystal structure of Ph3PAuCCC6H4NHC(O)C6H4-NO2-4 (3a) was determined by X-ray diffraction. The photophysical properties of gold(i) acetylide complexes 3b-3d were studied and the complexes show luminescence both in the solid state and in degassed THF solutions at 298 K. The anion-binding abilities of complexes 3a-3d in CDCl3 were also studied through 1H NMR titration experiments. They show similar anion selectivity trends and 3a exhibits the highest binding affinity towards anions due to the strongest electron-withdrawing ability of the NO2 group. In DMSO, 3a shows a dramatic color change upon addition of F-, which provides access to naked eye detection of F-. This journal is
Liquid crystal compound containing butadiyne structure and liquid crystal composition and application thereof
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Paragraph 0103; 0115-0117, (2021/05/08)
The invention relates to a liquid crystal compound containing a butadiyne structure. The liquid crystal compound is represented by a general formula I. The invention also relates to a liquid crystal composition which at least comprises the compound repres
Development of a Pre-assembled Through-Bond Energy Transfer (TBET) Fluorescent Probe for Ratiometric Sensing of Anticancer Platinum(ll) Complexes
Ang, Wee Han,Ong, Jun Xiang
, (2020/04/02)
Fluorescence microscopy has emerged as an attractive technique to probe the intracellular processing of Pt-based anticancer compounds. Herein, we reported the first through-bond energy transfer (TBET) fluorescent probe NPR1 designed for sensitive detectio
Synthesis and photophysical properties of multilayer emitting π-p-π fluorophores
Wang, Xiaorong,Zhao, Sanxiao,Chen, Yin,Wang, Jingang
, (2019/11/02)
Fluorescence is widely used in biology, medicine, and analytical chemistry. The anthracene framework has received considerable attention for the luminescent molecular design as an attractive building unit. Herein, Luminescent “π-p-π” anthracene crystals with different multilayer stacking modes were conducted by experimental methods and theoretical calculations. It was found that “these anthracene derivatives showed strong fluorescence and stability in both solution and solid-state; A face-to-face π-π stacking arrangement dominated in N9,N10-diphenyl-2,6-bis((trimethylsilyl)ethynyl)anthracene-9,10-diamine (4), while C/N–H … π interactions were observed in the crystal lattice of 2,6-diethynyl-N9,N10-diphenylanthracene-9,10-diamine (5); The excitation processes of S0→S1 of 4 and 5 belonged to Localized Excitation; The number of photons emitted could be nearly equal to the number of photons absorbed below 120K”. This study is expected to assist in the design of photonic materials in the field of optical chemistry.
Synthesis and asymmetric catalytic performance of one-handed helical poly(phenylacetylene)s bearing proline dipeptide pendants
Liu, Lijia,Wang, Yaodong,Wang, Fuqingyun,Zhang, Chunhong,Zhou, Yanli,Zhou, Zhengjin,Liu, Xudong,Zhu, Ruiqi,Dong, Hongxing,Satoh, Toshifumi
, (2019/11/14)
One-handed helical substituted polyacetylene has received extensive attention due to its potential in chiral stationary phases and molecular recognition. Here, three one-handed helical poly(phenylacetylene)s bearing proline or proline dipeptide as the pen
Design, synthesis, and structure-activity relationship of 7-propanamide benzoxaboroles as potent anticancer agents
Zhang, Jiong,Zhang, Jinyi,Hao, Guiyun,Xin, Weixiang,Yang, Fei,Zhu, Mingyan,Zhou, Huchen
, p. 6765 - 6784 (2019/08/20)
Benzoxaboroles, as a novel class of bioactive molecules with unique physicochemical properties, have been shown to possess excellent antimicrobial activities with tavaborole approved in 2014 as an antifungal drug. Although urgently needed, the investigation of benzoxaboroles as anticancer agents has been lacking so far. In this study, we report the design, synthesis, and anticancer structure-activity relationship of a series of 7-propanamide benzoxaboroles. Compounds 103 and 115 showed potent activity against ovarian cancer cells with IC50 values of 33 and 21 nM, respectively. Apoptosis was induced by these compounds and colony formation was effectively inhibited. Furthermore, they also showed excellent efficacy in ovarian tumor xenograft mouse model.
Mild-Base-Promoted Arylation of (Hetero)Arenes with Anilines
Monzón, Diego M.,Santos, Tanausú,Pinacho-Crisóstomo,Martín, Víctor S.,Carrillo, Romen
, p. 325 - 333 (2018/01/15)
Transition metal-free radical arylation of heteroarenes is achieved at room temperature by simply adding aqueous sodium carbonate to a solution of the corresponding heteroarene and arenediazonium salt, which can even be formed in situ. Such an easy, inexpensive and mild methodology has been optimized and applied to the expeditious modification of interesting molecular cores like naphthylimide or bisthienylcyclopentenes.
Palladium catalysed regio- and stereoselective synthesis of (E)-4-aryl-1,3-bis(trimethylsilyl)but-3-en-1-ynes
Rogalski, Szymon,Kubicki, Maciej,Pietraszuk, Cezary
, p. 6192 - 6198 (2018/09/17)
A practical and general synthetic approach to a series of 4-aryl-but-3-en-1-ynes is described. In the presence of palladium complexes a variety of aryl bromides (or iodides) undergo coupling with two equivalents of trimethylsilylacetylene with the formati
Stabilization of High Oxidation State Upconversion Nanoparticles by N-Heterocyclic Carbenes
M?ller, Nadja,Rühling, Andreas,Lamping, Sebastian,Hellwig, Tim,Fallnich, Carsten,Ravoo, Bart Jan,Glorius, Frank
supporting information, p. 4356 - 4360 (2017/04/03)
The stabilization of high oxidation state nanoparticles by N-heterocyclic carbenes is reported. Such nanoparticles represent an important subset in the field of nanoparticles, with different and more challenging requirements for suitable ligands compared to elemental metal nanoparticles. N-Heterocyclic carbene coated NaYF4:Yb,Tm upconversion nanoparticles were synthesized by a ligand-exchange reaction from a well-defined precursor. This new photoactive material was characterized in detail and employed in the activation of photoresponsive molecules by low-intensity near-infrared light (λ=980 nm).
