Results 141 to 150 of about 538,570 (408)

Chemical reactivity imprint lithography on graphene: Controlling the substrate influence on electron transfer reactions [PDF]

, 2012
The chemical functionalization of graphene enables control over electronic properties and sensor recognition sites. However, its study is confounded by an unusually strong influence of the underlying substrate. In this paper, we show a stark difference in the rate of electron transfer chemistry with aryl diazonium salts on monolayer graphene supported ...
arxiv   +1 more source

Microwave Assisted Synthesis of New 1-{2, 4-Dihydroxy-5-[5-(aryl)-1-pyridine/pyrimidine-4-carbonyl)-4, 5-dihydro-1H-pyrazol-3-yl]-phenyl}-3-(aryl)-propenones and their Antibacterial Activity

E-Journal of Chemistry, 2009
A series of 1-{2, 4-dihydroxy-5-[5-(aryl)-1-pyridine/pyrimidine-4-carbonyl)-4, 5-dihydro-1H-pyrazol-3-yl]-phenyl}-3-(aryl)-propenones (2a-h) have been synthesized from 1-[2,4-dihydroxy-5-(aryl acryloyl)phenyl]-aryl propenones(1a-h)by Micheal addition ...
D. Ashok, K. Aravind
doaj   +1 more source

Hyperphosphorescent OLEDs: Harnessing the Power of MR‐TADF Terminal Emitters

Advanced Optical Materials, EarlyView.
Hyperphosphorescent organic light‐emitting diodes (HP‐OLEDs) use phosphorescent sensitizers with multiresonant thermally activated delayed fluorescence terminal emitters. HP‐OLEDs show efficient, narrowband electroluminescence and moderate efficiency roll‐off.
Emma V. Puttock, Janine Haug, Eli Zysman‐Colman, Stefan Bräse   +3 more
wiley   +1 more source

A Defect-Free Naphthalene Diimide Bithiazole Copolymer via Regioselective Direct Arylation Polycondensation [PDF]

arXiv, 2018
An optimized direct arylation polycondensation (DAP) protocol for the synthesis of a novel naphthalene diimide (NDI) 2,2'-bithiazole (2-BTz) copolymer (PNDI-2-BTz) is presented. The regioselective C-H activation of 2-BTz at the 5-positions allows for the synthesis of fully regioregular and homocoupling-free PNDI-2-BTz of high molecular weight in less ...
arxiv  

Synthesis and Photophysical Property Studies of the 2,6,8-Triaryl-4-(phenylethynyl)quinazolines

Molecules, 2014
The 2-aryl-6,8-dibromo-4-chloroquinazolines derived from the 2-aryl-6,8-dibromoquinazolin-4(3H)-ones were subjected to the Sonogashira cross-coupling with terminal acetylenes at room temperature to afford novel 2-aryl-6,8-dibromo-4-(alkynyl)quinazoline ...
Malose Jack Mphahlele, Hugues Kadem Paumo, Ahmed M. El-Nahas, Morad M. El-Hendawy   +3 more
doaj   +1 more source

Acid‐Catalyzed Rearrangements of 3‐Aryloxirane‐2‐Carboxamides: Novel DFT Mechanistic Insights

ChemistryOpen, 2020
Efficient synthesis of 3‐arylquinolin‐2(1H)‐ones and N‐(2‐carboxyaryl)‐oxalamides from protic acid‐catalyzed rearrangements of 3‐aryloxirane‐2‐carboxamides was achieved recently but not well understood. In contrast to the classical Meinwald rearrangement,
Dr. Zheng‐Wang Qu, Dr. Hui Zhu, Prof. Sergey A. Katsyuba, Dr. Vera L. Mamedova, Prof. Vakhid A. Mamedov, Prof. Stefan Grimme   +5 more
doaj   +1 more source

Metallaphotoredox Difluoromethylation of Aryl Bromides.

Angewandte Chemie, 2018
Herein, we report a convenient and broadly applicable strategy for the difluoromethylation of aryl bromides by metallaphotoredox catalysis. Bromodifluoromethane, a simple and commercially available alkyl halide, is harnessed as an effective source of ...
Vlad Bacauanu, S. Cardinal, M. Yamauchi, Masaru Kondo, David F. Fernández, Richard Remy, D. MacMillan   +6 more
semanticscholar   +1 more source

ChemInform Abstract: Ruthenium‐Catalyzed Direct Arylations with Aryl Chlorides

ChemInform, 2016
AbstractReview: [50 refs.
Hua-Li Qin, Eric Assen B. Kantchev, Gao-Feng Zha   +2 more
openaire   +3 more sources

Thermally Activated Delayed Fluorescence and Beyond. Photophysics and Material Design Strategies.

Advanced Photonics Research, EarlyView.
Photophysical properties of TADF molecules are determined by characteristic parameters that are discussed in detail(. Moreover, using femtosecond time‐resolved spectroscopy, quantum mechanical considerations, and state‐of‐art calculations, deeper understanding allows us to design breakthrough Cu(I) and organic TADF‐ OLED materials. For the latter ones,
Hartmut Yersin, Uwe Monkowius
wiley   +1 more source

Bismuth(III) triflate: an economical and environmentally friendly catalyst for the Nazarov reaction

Beilstein Journal of Organic Chemistry
We describe the use of bismuth(III) triflate as an efficient and environmentally friendly catalyst for the Nazarov reaction of aryl vinyl ketones, leading to the synthesis of 3-aryl-2-ethoxycarbonyl-1-indanones and 3-aryl-1-indanones.
Manoel T. Rodrigues Jr., Aline S. B. de Oliveira, Ralph C. Gomes, Amanda Soares Hirata, Lucas A. Zeoly, Hugo Santos, João Arantes, Catarina Sofia Mateus Reis-Silva, João Agostinho Machado-Neto, Leticia Veras Costa-Lotufo, Fernando Coelho   +10 more
doaj   +1 more source