- Molecular and electronic structure of MM quadruply bonded complexes containing O2CC6H4N(Ph)2 supporting ligands
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The complexes trans-M2(TiPB)2(O 2CC6H4-4-NPh2)2 where M = Mo (I), and M = W (II) were prepared from the reaction between M 2(TiPB)4 and the carboxylic acid Ph 2N-4-C6H4CO2H (~2 equiv.) in toluene (TiPB = 2,4,6-triisopropylbenzoate). The compounds were isolated as microcrystalline powders that are yellow, I or purple II, and are air-sensitive. Compound I was characterized by single-crystal X-ray crystallography and shown to have a centrosymmetric structure and a planar central C6H4-CO2M2O 2C-C6H4 unit. Calculations indicate that the HOMO is principally M2δ with mixing of the filled π-orbitals of the N,N-diphenyl-4-aminobenzoate. Oxidation of I and II yield cationic species that have been characterized by EPR and UV-Vis-NIR spectroscopy. The radical cations show EPR spectra characteristic of M25+ centers having the MM configuration σ2π4δ 1 and compound I+ shows a low energy NIR transition assignable to a ligand to metal charge transfer transition. The homoleptic compound Mo2(O2CC6H4-4-N-Ph 2)4, III, was prepared from the reaction between Mo(CO)6 and Ph2N-4-C6H4CO 2H in refluxing ortho-dichlorobenzene and is shown to exhibit similar spectroscopic features to those of I.
- Chisholm, Malcolm H.,Durr, Christopher B.,Lewis, Sharlene A.
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Read Online
- SYSTEMS AND METHODS FOR INCREASING NITROGEN MONOXIDE CONCENTRATION AND REMOVING NITROGEN DIOXIDE FROM A GAS STREAM
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The presently disclosed embodiments relate to devices and methods for efficiently removing the nitrogen dioxide (NO2) from a gas stream while enhancing the concentration of nitric oxide (NO) in the gas stream without making any reaction byprodu
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- Assembly and optical properties of 1D helical bundles induced by triphenylamine, side chains and solvents in crystals
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Two novel helical aromatic foldamer derivativesTPA-Q6(n-He)andTPA-Q6(i-Bu)were synthesized and characterized by introducingn-hexyloxy and isobutoxy side chains, respectively, and modifying quinoline amide foldamers with the triphenyl
- Li, Baolin,Pang, Zhi,Qi, Ting
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p. 5555 - 5562
(2021/07/02)
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- Star-shaped D-A type conjugated molecule as well as synthesis method and application thereof
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The invention discloses a star-shaped D-A type conjugated molecule as well as a synthesis method and application thereof, and belongs to the technical field of functional organic polymer materials. The chemical structural formula of the star-shaped D-A ty
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Paragraph 0114; 0116-0117; 0129; 0131-0132; 0139; 0141-0142
(2021/06/13)
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- Ni-Catalyzed Carboxylation of C(sp2)-S Bonds with CO2: Evidence for the Multifaceted Role of Zn
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Nickel-catalyzed reductive carboxylation reactions of aryl electrophiles typically require the use of metallic reducing agents. At present, the prevailing perception is that these serve as both a source of electrons and as a source of Lewis acids that may aid CO2 insertion into the Ni-C bond. Herein, we provide evidence for the in situ formation of organometallic species from the metallic reductant, a step that has either been ruled out or has been unexplored in catalytic carboxylation reactions with metal powder reductants. Specifically, we demonstrate that Zn(0) acts as a reductant and that Zn(II) generates arylzinc species that might play a role in the C(sp2)-S carboxylation of arylsulfonium salts. Overall, the reductive Ni-catalyzed C(sp2)-S carboxylation reaction proceeds under mild conditions in a non-amide solvent, displays a wide substrate scope, and can be applied to the formal para C-H carboxylation of arenes.
- Yanagi, Tomoyuki,Somerville, Rosie J.,Nogi, Keisuke,Martin, Ruben,Yorimitsu, Hideki
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p. 2117 - 2123
(2020/02/28)
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- DIPHENYLAMINO-METHYLENE MALONONITRILE BASED COMPOUNDS AS FLUORESCENCE PROBES
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The present invention provides compounds of formula (I) and formula (II): or a pharmaceutically acceptable salt or a stereoisomer thereof; wherein, ring A and ring B have the meanings given in the specification. The compounds of the present disclosure are useful as fluorescence probe in detecting tubulin in a sample and therefore useful for the diagnosis of tubulin and its associated diseases like cancer in a subject.
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Page/Page column 15-16
(2020/03/23)
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- Triphenylamine derivative based on modification of imidazole ionic liquid and preparation method and application of triphenylamine derivative
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The invention discloses a preparation method of a triphenylamine derivative based on the modification of imidazole ionic liquid represented by a formula (I) (shown in the description) and a method forpreparing a copolymer film represented by a formula (VI
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- Independently Tuned Frontier Orbital Energy Levels of 1,3,4,6,9b-Pentaazaphenalene Derivatives by the Conjugation Effect
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Herein reported are syntheses and the unique substituent effect in 1,3,4,6,9b-pentaazaphenalene (5AP) derivatives. We developed the new synthetic route via (N,N-pyridine-2,6-diyl)bisamides, which enabled us to prepare a variety of substituted 5APs and to
- Watanabe, Hiroyuki,Tanaka, Kazuo,Chujo, Yoshiki
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p. 2768 - 2778
(2019/02/26)
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- Metal-Bonded Redox-Active Triarylamines and Their Interactions: Synthesis, Structure, and Redox Properties of Paddle-Wheel Copper Complexes
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Four new triphenylamine ligands with different substituents in the para position and their corresponding copper(II) complexes are reported. This study includes their structural, spectroscopic, magnetic, and electrochemical properties. The complexes possess a dinuclear copper(II) paddle-wheel core, a building unit that is also common in metal-organic frameworks. Electrochemical measurements demonstrate that the triphenylamine ligands and the corresponding complexes are susceptible to oxidation, resulting in the formation of stable radical cations. The square-wave voltammograms observed for the complexes are similar to those of the ligands, except for a slight shift in potential. Square-wave voltammetry data show that, in the complexes, these oxidations can be described as individual one-electron processes centered on the coordinated ligands. Spectroelectrochemistry reveals that, during the oxidation of the complexes, no difference can be detected for the spectra of successively oxidized species. For the absorption bands of the oxidized species of the ligands and complexes, only a slight shift is observed. ESR spectra for the chemically oxidized complexes indicate ligand-centered radicals. The copper ions of the paddle-wheel core are strongly antiferromagnetic coupled. DFT calculations for the fully oxidized complexes indicate a very weak ferromagnetic coupling between the copper ions and the ligand radicals, whereas a very weak antiferromagnetic coupling is found among the ligand radicals.
- Akintola, Oluseun,B?hme, Michael,Rudolph, Manfred,Buchholz, Axel,G?rls, Helmar,Plass, Winfried
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p. 271 - 284
(2019/01/22)
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- Enhancement of intramolecular charge transfer strength in diphenylamine substituted symmetric 1,3,4-oxadiazole derivatives
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The intramolecular charge transfer characteristic of two diphenylamine substituted symmetric 1,3,4-oxadiazole derivatives (DPAOXD and DPAOXDBEN) was studied through a combination of experimental techniques and theoretical calculations. Significant enhancement of intramolecular charge transfer strength has been found in both these compounds through molecular structure modification. The experimental result found only a small red shift in the absorption spectra (~15 nm) but a very large red shift in the emission spectra (~114 nm for DPAOXD and ~140 nm for DPAOXDBEN) with increasing solvent polarity, indicating a large extent charge transfer occurred in their excited state. The increase of molecular dipole moment from the ground state to the charge transfer excited state is calculated to be 22.10 D in DPAOXD and 26.67 D in DPAOXDBEN, respectively. Theoretical calculations present clear evidence that electrons transfer from the terminal diphenylamine to the bi-1,3,4-oxadiazole rings in DPAOXD, and the two 1,3,4-oxadiazole rings and central benzene ring in DPAOXDBEN. As compared to the methoxy group, the substitution by a diphenylamine group could increase both the transferred charge and distance, which could substantially strengthen the charge transfer character. Further introduction of a central benzene ring in DPAOXDBEN could further increase the transferred distance, and then the charge transfer strength. These findings could provide good guidance for the design of molecules with high intramolecular charge transfer characteristics.
- Chen, Fangyi,Zhang, Wanxi,Liu, Zijian,Meng, Lingyan,Bai, Binglian,Wang, Haitao,Li, Min
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- A Cross-linked Conjugated Polymer Photosensitizer Enables Efficient Sunlight-Induced Photooxidation
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Photooxidation under sunlight has potential in organic synthesis, bacterial killing, and organic waste treatment. Photosensitizers (PSs) can play an important role in this process. High 1O2 generation efficiency and excellent photostability under sunlight, as well as easy recyclability are ideal properties for PSs, but are not easy to achieve simultaneously. Herein, a pure organic porous conjugated polymer PS, CPTF, shows great photostability, large specific surface area, and high 1O2 generation efficiency under sunlight for photooxidation. For the oxidation of aromatic aldehyde to aromatic acid, the PS catalyst shows excellent recyclability, and enables solvent-free reactions in high yields both under direct sunlight and simulated AM 1.5G irradiation. In addition, the successful application of CPTF as an antibacterial agent and organic waste decomposition under simulated AM 1.5G irradiation indicates the potential of CPTF in sunlight-induced waste water treatment.
- Wu, Wenbo,Xu, Shidang,Qi, Guobin,Zhu, Han,Hu, Fang,Liu, Zitong,Zhang, Deqing,Liu, Bin
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supporting information
p. 3062 - 3066
(2019/01/25)
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- Method for copper-catalyzed carboxylation reaction of arylboronic acid and carbon dioxide
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The invention discloses a method for a copper-catalyzed carboxylation reaction of arylboronic acid and carbon dioxide. According to the method, carbon dioxide is used as a C1 source, copper catalysisis adopted, alkoxide serves as alkali, and a reaction is carried out in an organic solvent; the method is simple in process and easy to implement, and shows wide functional group compatibility; the method allows various arylboronic acids such as monosubstituted or polysubstituted phenylboronic acid, polycyclic aromatic hydrocarbon boronic acid and benzoheterocyclic boronic acid to be converted into corresponding arylcarboxylic acids with considerable yield under mild conditions; and the produced carboxylic acids have important application value, and can be used for deriving a great number of other common chemical substances, such as acyl halide, acid anhydride, ester and amide.
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Paragraph 0055; 0056
(2019/12/29)
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- Facile fabrication of redox-active and electrochromic poly(amide-amine) films through electrochemical oxidative coupling of arylamino groups
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Two novel electropolymerizable monomers, namely 3,5-bis(4-diphenylaminobenzamido)-N-[4-(carbazol-9-yl)phenyl]benzamide (5) and 3,5-bis(4-diphenylaminobenzamido)-N-[4-(3,6-dimethoxycarbazol-9-yl)phenyl]benzamide (5-MeO), were synthesized, and their electro
- Hsiao, Sheng-Huei,Wang, Hui-Min
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p. 2476 - 2485
(2016/07/14)
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- New dinuclear hydrido-carbonyl rhenium complexes designed as photosensitizers in dye-sensitized solar cells
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The possible use of some dinuclear rhenium complexes as sensitizers for dye sensitized solar cells (DSSCs) has been investigated. They have general formula [Re2(μ-X)(μ-Y)(CO)6(μ-pyridazine-4-COOH)], with X = Y = Cl (1), X = H, Y = benzoato (2), and X = H, Y = 4-diphenylaminobenzoato (3). An original synthetic strategy has been set for preparing the hydrido-carboxylato derivatives 2 and 3. They have been indicated by DFT and TD-DFT computations as the most promising dyes, endowed with good light harvesting capability. The complexes have absorption maxima in the range of 405-443 nm, on TiO2 films, arising from metal-to-ligand-charge transfer transitions. Cyclic voltammetry experiments have been performed on the derivatives containing the methyl ester of the pyridazine-4-COOH acid, showing electrochemical band gaps in the range of 2.25-1.63 eV. The best DSSC results have been obtained using complex 3, with an overall solar-to-electric conversion efficiency of 1.0%. Noteworthy the presence of a hydrido ligand did not show any detrimental effect on the stability of the sensitizers under the operating conditions.
- Veronese, Lorenzo,Procopio, Elsa Quartapelle,De Rossi, Francesca,Brown, Thomas M.,Mercandelli, Pierluigi,Mussini, Patrizia,D'Alfonso, Giuseppe,Panigati, Monica
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p. 2910 - 2919
(2016/03/22)
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- Radical polymer containing a polytriphenylamine backbone: Its synthesis and electrochemical performance as the cathode of lithium-ion batteries
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A novel radical monomer containing triphenylamine and the 2,2,6,6-tetramethylpiperidinyl-N-oxy (TEMPO) radical has been synthesized. The corresponding linear homopolymer of 4-carboxy-N,N-diphenylaniline-2,2,6,6-tetramethylpiperidin-1-yloxy (PTPA-TEMPO) wa
- Su, Chang,Yang, Fang,Xu, Lihuang,Zhu, Xiaogang,He, Huihui,Zhang, Cheng
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p. 606 - 611
(2015/03/14)
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- Electrosynthesis and electrochromic properties of poly(amide-triarylamine)s containing triptycene units
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Four bis(amide-triarylamine) derivatives featuring a triptycene as an interior core and terminal electroactive triphenylamine (TPA) or N-phenylcarbazole (NPC) groups were prepared by the condensation reactions from 1,4-bis(4-aminophenoxy)triptycene with 4-carboxytriphenylamine and N-(4-carboxyphenyl)carbazole, respectively, and from 1,4-bis(4-carboxyphenoxy)triptycene with 4-aminotriphenylamine and N-(4-aminophenyl)carbazole, respectively. The electrochemistry and electropolymerization of these bis(amide-triarylamine) derivatives were investigated. The stability of the oxidized forms of the bis(amide-triarylamine)s is affected by the orientation of amide linkage and the structure of terminal triarylamine unit. Two of the bis(amide-triarylamine)s could be electropolymerized into robust films on the electrode surface in an electrolyte solution. The electrogenerated polymer films exhibited reversible electrochemical oxidation processes and strong color changes upon electro-oxidation, which can be switched by potential modulation. The electrochromic properties of the films were evaluated by the spectroelectrochemical and electrochromic switching studies. The TPA-based film showed better electrochromic performance than the NPC-based one.
- Hsiao, Sheng-Huei,Chiu, Yu-Ting
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p. 90941 - 90951
(2015/11/11)
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- Zirconium(IV) metallocavitands as blue-emitting materials
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A series of zirconium-carboxylate metallocavitands with the general formula [(CpZr)3(μ-κ2,O′,O″CR) 3(μ3-O)(μ2-OH)3]Cl (Cp = cyclopentadienyl; R = C5H4N (5), C6/s
- Iden, Hassan,Bi, Wenhua,Morin, Jean-Francois,Fontaine, Frederic-Georges
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p. 2883 - 2891
(2014/04/03)
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- Effect of self-assembled monolayer treated zno on the photovoltaic properties of inverted polymer solar cells
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Inverted bulk hetero-junction polymer solar cells (iPSC) composed of P3HT/PC61BM blends on the ZnO modified with benzoic acid derivatives-based self-assembled monolayers (SAM) are fabricated. Compared with the device using the pristine ZnO, the devices wi
- Yoo, Seong Il,Do, Thu Trang,Ha, Ye Eun,Jo, Mi Young,Park, Juyun,Kang, Yong-Cheol,Kim, Joo Hyun
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p. 569 - 574
(2014/03/21)
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- Paraphenylene dimers with diphenylamine donor groups: Synthesis and photophysics
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A novel paraphenylene dimer (D696) with electron donating diphenylamine side chain groups has been prepared. Optical absorption measurements were theoretically and experimentally determined showing a red shift in the absortivity relative to dialkylamine f
- Le, Khoa,Chand, Lokendra B.,Griffin, Colette,Williams, Alfred L.,Taylor, Darlene K.
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p. 3097 - 3100
(2013/06/27)
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- Triphenylamine-based simple chemosensor for selective fluorometric detection of fluoride, acetate and dihydrogenphosphate ions in different solvents
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Triphenylamine-based new chemosensors 1 and 2 have been designed and synthesized for fluorometric detection of anions. The urea-amide conjugates in 1 and 2 are involved in binding of anions via hydrogen bonding. UV-vis and fluorescence titration experimen
- Ghosh, Kumaresh,Saha, Indrajit
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experimental part
p. 97 - 107
(2012/03/26)
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- Photoreactive polynorbornene bearing 4-(diphenylamino)benzoate groups: Synthesis and application in electroluminescent devices
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A new fluorescent and photoreactive polymer, poly-(endo,exo-bis(4-(4- (diphenylamino)benzoyloxy)benzyl)bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylate), was prepared by ring opening metathesis polymerization. This polymer combines the photoreactivity of aryl e
- Griesser, Thomas,Rath, Thomas,Stecher, Harald,Saf, Robert,Kern, Wolfgang,Trimmel, Gregor
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p. 269 - 276
(2008/02/02)
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- Intramolecular charge transfer with 4-(N-phenylamino)benzoic acid. The N-phenyl amino conjugation effect
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4-(N-phenylamino)benzoic acid (PhABA) was synthesized and its fluorescence spectra were recorded. In aprotic polar solvents, PhABA emitted strongly Stokes-shifted single-banded fluorescence with practically the same wavelength as that of 4-(N,N-diphenylam
- Ma, Li-Hua,Chen, Zhao-Bin,Jiang, Yun-Bao
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p. 104 - 113
(2007/10/03)
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- Convenient synthesis of triarylamines via ester-mediated nucleophilic aromatic substitution
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A convenient method for the preparation of arylamines via nucleophilic displacement of methoxy- and/or fluorobenzoates with lithium amides is presented. Treatment of 2,6-di-tert-butyl-4-methoxyphenyl 2- or 4-fluorobenzoate (2 or 7) with lithium diarylamid
- Hattori, Tetsutaro,Satoh, Takashi,Miyano, Sotaro
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p. 514 - 518
(2007/10/03)
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