Results 91 to 100 of about 2,082 (291)

Primary coloured electrochromism of aromatic diesters and phenylenediamines

, 2015
Thirteen aromatic oxygen and thioic S,S'-diesters were synthesized and investigated using electrochemical (cyclic voltammetry and controlled potential electrolysis) and UV-vis spectroscopic techniques over a range of temperatures.
Xu, Xiuhui
core  

Synthesis and NMR spectroscopic studies of Allylsulfanyl-N1-alkyl-N4-phenyl-1,4-phenylenediamines and their Cyclization Products, 2,3-Dihydro-1-benzothiophenes and Thiochromans [PDF]

, 2004
Regioselective addition of allylmercaptan at the C-3 position adjacent to the nitrogen carrying phenyl group of the 1,4-phenylenediamine moiety of 1−4 was rigorously confirmed by the 1D NOE difference in combination with gHMBC experiments.
Steel, P.J., Akhmedov, N.G., Katritzky, A.R., Rostek, C.J., Wang, M.   +4 more
core   +1 more source

Synthesis and Optical Properties of Diboron Complexes of 1,4‐Anthraquinone Derivatives

Chemistry – A European Journal, EarlyView.
1,4‐Diboron complexes exhibit near‐infrared fluorescence, in contrast to non‐emissive 1,5‐diboron analogues. Fluorescence quantum yields decrease with increasing electron‐donating substituents, attributed to enhanced nonradiative decay via intramolecular PeT.
Yasuhiro Kubota, Ayumi Ogasawara, Ayato Hakamada, Naoya Suzuki, Masayasu Taki, Shota Mizuno, Toshiyasu Inuzuka, Kazumasa Funabiki, Chie Yamada‐Kubota, Miho Kuwahara, Tetsuya Hara   +10 more
wiley   +1 more source

Metal-free synthesis of benzimidazoles via pyridinium-catalyzed silane activation under atmospheric CO₂

Results in Chemistry
The conversion of CO₂ into valuable nitrogen-containing heterocycles represents an attractive and sustainable strategy in green chemistry. In this work, an efficient metal-free catalytic system was developed for synthesizing benzimidazoles under mild ...
Simin Kafash, Amir Abdolmaleki
doaj   +1 more source

Identifying the Azobenzene/Aniline reaction intermediate on TiO2-(110) : a DFT Study [PDF]

, 2013
Density functional theory (DFT) calculations, both with and without dispersion corrections, have been performed to investigate the nature of the common surface reaction intermediate that has been shown to exist on TiO2(110) as a result of exposure to ...
Robinson, Jim, Dr., Woodruff, D. P., Bradley, M. K. (Matthew K.)   +2 more
core   +1 more source

Post‐Modification of Tripyrenylenes to Enantiopure π‐Extended D3‐Symmetric Propellers

Chemistry – A European Journal, EarlyView.
The post‐modification of tripyrenylenes to π‐extended enantiopure propellers with tris‐phenanthrophenazines is presented and the chiroptical properties as well as the solid‐state packings investigated in comparison to the corresponding racemic mixtures.
Dennis Popp, Melanie Bruttel, Sebastian Möbert, Anusha Sounder Rajan, Christoph Keck, Darius Boehm, Frank Rominger, Sven M. Elbert, Michael Mastalerz   +8 more
wiley   +1 more source

Metal-catalyzed coupling/carbonylative cyclizations for accessing dibenzodiazepinones: an expedient route to clozapine and other drugs

Beilstein Journal of Organic Chemistry
A sequential strategy to access 10,11-dihydro-5H-dibenzo[b,e][1,4]diazepinones (DBDAPs) is disclosed in this article through a palladium and copper-catalyzed amination (Buchwald–Hartwig (B–H) or Chan–Lam (C–L)) followed by a palladium-catalyzed ...
Amina Moutayakine, Anthony J. Burke
doaj   +1 more source

Matrix‐Free Afterglow Carbon Dots: Synthetic Strategies, Luminescence Mechanisms, and Emerging Applications

Carbon Innovation, EarlyView.
This review systematically elucidates the luminescence mechanism, synthesis methods of matrix‐free afterglow carbon dots, and their application progress in information encryption, light‐emitting diodes, sensing, bioimaging, and tumor treatment, and finally, discusses the current challenges and future development directions. ABSTRACT Afterglow materials,
Yupeng Liu, Xiangxin Sun, Zhiqi Cai, Hanyi Zhang, Yiming Hao, Songnan Qu   +5 more
wiley   +1 more source

Heterogeneous Single/Dual‐Atom Electrocatalysts in Lithium–Sulfur Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This review summarizes recent advances in single‐atom and dual‐atom electrocatalysts for high‐performance lithium–sulfur batteries. The text systematically covers the classification of catalysts by active metal centers, key synthesis methods, in situ characterization for mechanistic insights, and electrocatalytic mechanisms.
Wenbin Li, Ying Xin, Zhaoliang Zhang, Jin Wang   +3 more
wiley   +1 more source

Bridging Stability and Reactivity: Novel Dinucleating Ligand With Rigid Backbone Stabilizes a Cu2O2 Side‐On Peroxido Structure

European Journal of Inorganic Chemistry, EarlyView.
The herein‐developed tyrosinase model complex enables the transfer of tyrosinase‐like catalytic oxygenation activity into artificial systems. Therefore, it enables the use of molecular oxygen for oxygenation and oxidation of phenolic substrates at room temperature.
Rosalie Dalhoff, Christine Charlotte Müller, Alexander Hoffmann, Sonja Herres‐Pawlis   +3 more
wiley   +1 more source