Results 41 to 50 of about 24,157 (222)

Reinforcement of Cathode Interface Using a Dipolar Small Molecule for Enhancing Operational Stability of Perovskite Solar Cells

Advanced Science, EarlyView.
We report a high‐dipole interlayer, MQPPO, that simultaneously improves efficiency and stability in perovskite solar cells. Its strong interfacial dipole enhances photovoltaic performance, while its uniform coverage and strong interaction with Ag effectively suppress AgI formation, ensuring long‐term stability under moisture and thermal stress.
Dong Hyun Lee, Seok Woo Lee, Min Jun Choi, Ramesh Kumar Chitumalla, Sang Eun Yoon, Gyeong G. Jeon, Juan Anthony Prayogo, Dong Won Kim, Joonkyung Jang, Jinhee Heo, Dong Wook Chang, Jong H. Kim   +11 more
wiley   +1 more source

Poly[(μ-2,3-diethyl-7,8-dimethylquinoxaline-κ2N:N)(2,3-diethyl-7,8-dimethylquinoxaline-κN)-μ-nitrato-κ2O:O′-nitrato-κ2O,O′-disilver(I)]

IUCrData
The structure of the title compound, [C14H18N2)2Ag2](NO3)2, contains subtle differences in ligand, metal, and counter-anion coordination. One quinoxaline ligand uses one of its quinoxaline N atoms to bond to one silver cation. That silver cation is bound
Guy Crundwell, Ashley Leeds
doaj   +1 more source

Antimicrobial Evaluation and Synthesis of Some Phenylpyrazolo benzothiazolo quinoxaline Derivatives

E-Journal of Chemistry, 2009
2,3-Diphenyl quinoxaline (SI) was fused with 2-amino benzothiazoles (SII) by a methylene bridge, which was then allowed for acetylation. The acetylated product (SIV) was made to react with different aromatic aldehydes to give chalcones (SV1-SV5 ...
CH. Sridevi, K. Balaji, A. Naidu, R. Sudhakaran   +3 more
doaj   +1 more source

Eco-friendly approach to access of quinoxaline derivatives using nanostructured pyrophosphate Na2PdP2O7 as a new, efficient and reusable heterogeneous catalyst

BMC Chemistry, 2020
In the present study, we report the synthesis of various quinoxaline derivatives from direct condensation of substituted aromatic 1,2-diamine with 1,2-dicarbonyl catalyzed by nanostructured pyrophosphate Na2PdP2O7 as a new highly efficient ...
Karim Dânoun, Younes Essamlali, Othmane Amadine, Hassan Mahi, Mohamed Zahouily   +4 more
doaj   +1 more source

Synthesis of quinoxaline 1,4-di-N-oxide derivatives on solid support using room temperature and microwave-assisted solvent-free procedures [PDF]

, 2011
We describe the synthesis of 12 new ethyl and methyl quinoxaline-7-carboxylate 1,4-di-N-oxide derivatives on solid supports with room temperature and microwave-assisted solvent-free procedures.
Bocanegra-Garcia, V. (Virgilio), Gomez-Caro, L.C. (Lilia C.), Monge, A. (Antonio), Rivera, G. (Gildardo), Sanchez-Sanchez, M. (Mario)   +4 more
core   +1 more source

Enhanced Energy Transfer from a Metal–Organic Framework to a Highly Confined Organic Phosphorescent Dye

Advanced Science, EarlyView.
A phosphorescent dye was designed to fit in a hand‐to‐glove fashion into the 1D‐pore channels of MIL‐68(In). We synthesized MIL‐68(In) as powder and thin films, loaded the dye into the pores with controlled packing, and found that the phosphorescence and quantum yield are enhanced.
Bahram Hosseini Monjezi, Thomas Kasper, Gloria Hong, Changfeng Si, Robert Oestreich, Oliver Weingart, Peter G. Weidler, Christof Wöll, Eli Zysman‐Colman, Christoph Janiak, Stefan Bräse, Klaus Müller‐Buschbaum, Alexander Knebel   +12 more
wiley   +1 more source

Interaction of GABA and Excitatory Amino Acids in the Basolateral Amygdala: Role in Cardiovascular Regulation [PDF]

, 1997
Activation of the amygdala in rats produces cardiovascular changes that include increases in heart rate and arterial pressure as well as behavioral changes characteristic of emotional arousal.
Cook, Jennifer C., Gregg, Adam E., Sanders, Brian J., Soltis, Robert P.   +3 more
core   +2 more sources

Substrate‐Affinitive P‐Type Azapolycyclic Photosensitizer for Chemoselective Nitrilization Under Mild Conditions

Advanced Science, EarlyView.
We developed a series of quinoxalinoquinoxaline (QQ) photosensitizers featuring high and tunable excited‐state reduction potentials (E(PC•+/PC*) = –1.76 to –2.05 V vs. SCE). Their hydrogen‐bonding interaction with carbonyl substrates enables selective single‐electron transfer events for selective nitrilization of 1° amides, offering a tunable ...
Seongwoo Bae, Dongwook Kim, Jinwoo Kim
wiley   +1 more source

Polyoxa- and Polyazamacrocycles Incorporating 6,7-Diaminoquinoxaline Moiety: Synthesis and Application as Tunable Optical pH-Indicators in Aqueous Solution

Molecules, 2023
Synthetic approach to fluorescent polyaza- and polyoxadiazamacrocycles comprising a structural fragment of 6,7-diamino-2,3-diphenylquinoxaline has been elaborated using Pd-catalyzed amination providing target compounds in yields up to 77%.
Igor A. Kurashov, Alisa D. Kharlamova, Anton S. Abel, Alexei D. Averin, Irina P. Beletskaya   +4 more
doaj   +1 more source

Ion exchange membranes based upon crosslinked sulfonated polyethersulfone for electrochemical applications [PDF]

, 2013
Synthesis and characterization of new ion exchange membranes made from chlorosulfonated polyethersul- fone (SO2Cl-PES) crosslinked by polyaminated crosslinking reagents have been performed.
FAUVARQUE, J.F, MABROUK, Walid, MATOUSSI, F., OGIER, Lionel, SOLLOGOUB, Cyrille, VIDAL, Serge   +5 more
core   +6 more sources