6156-37-2Relevant academic research and scientific papers
Molecular and electronic structure of MM quadruply bonded complexes containing O2CC6H4N(Ph)2 supporting ligands
Chisholm, Malcolm H.,Durr, Christopher B.,Lewis, Sharlene A.
, p. 339 - 345 (2013)
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.
Assembly and optical properties of 1D helical bundles induced by triphenylamine, side chains and solvents in crystals
Li, Baolin,Pang, Zhi,Qi, Ting
supporting information, p. 5555 - 5562 (2021/07/02)
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
SYSTEMS AND METHODS FOR INCREASING NITROGEN MONOXIDE CONCENTRATION AND REMOVING NITROGEN DIOXIDE FROM A GAS STREAM
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, (2021/05/07)
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
Star-shaped D-A type conjugated molecule as well as synthesis method and application thereof
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Paragraph 0114; 0116-0117; 0129; 0131-0132; 0139; 0141-0142, (2021/06/13)
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
DIPHENYLAMINO-METHYLENE MALONONITRILE BASED COMPOUNDS AS FLUORESCENCE PROBES
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Page/Page column 15-16, (2020/03/23)
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.
Ni-Catalyzed Carboxylation of C(sp2)-S Bonds with CO2: Evidence for the Multifaceted Role of Zn
Yanagi, Tomoyuki,Somerville, Rosie J.,Nogi, Keisuke,Martin, Ruben,Yorimitsu, Hideki
, p. 2117 - 2123 (2020/02/28)
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.
Triphenylamine derivative based on modification of imidazole ionic liquid and preparation method and application of triphenylamine derivative
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, (2019/02/08)
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
Independently Tuned Frontier Orbital Energy Levels of 1,3,4,6,9b-Pentaazaphenalene Derivatives by the Conjugation Effect
Watanabe, Hiroyuki,Tanaka, Kazuo,Chujo, Yoshiki
, p. 2768 - 2778 (2019/02/26)
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
Metal-Bonded Redox-Active Triarylamines and Their Interactions: Synthesis, Structure, and Redox Properties of Paddle-Wheel Copper Complexes
Akintola, Oluseun,B?hme, Michael,Rudolph, Manfred,Buchholz, Axel,G?rls, Helmar,Plass, Winfried
, p. 271 - 284 (2019/01/22)
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.
Enhancement of intramolecular charge transfer strength in diphenylamine substituted symmetric 1,3,4-oxadiazole derivatives
Chen, Fangyi,Zhang, Wanxi,Liu, Zijian,Meng, Lingyan,Bai, Binglian,Wang, Haitao,Li, Min
, p. 1 - 10 (2019/01/15)
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.
