Results 71 to 80 of about 7,031 (227)

Simplified Kinetics and Colour Formation in Sucrose Solutions Based on A-Dicarbonyl Compounds [PDF]

open access: yes, 2007
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence
Fiedler, Thorsten   +3 more
core   +1 more source

New opportunities for the synthesis of quinoxaline derivatives

open access: yesChimica Techno Acta, 2019
Convenient methods for the synthesis of quinoxaline derivatives with the use of nucleophilic aromatic substitution of hydrogen in heteroaromatic part of molecule in conditions of the acid catalysis were elaborated.
Olga S. Koptyaeva   +4 more
doaj   +1 more source

Flexible white thermally activated delayed fluorescence polymer with alkyl spacer and side‐chain encapsulation for efficient solution‐processed white organic light‐emitting diodes

open access: yesFlexMat, EarlyView.
A “gemstone‐necklace” FASCE strategy synthesizes single‐component white polymers (PTF‐Qx) by alternating rigid TADF units with flexible alkyl chains. The non‐doped rigid device achieves a high EQE of 15.66% with stable white emission (CIE: 0.36, 0.46).
Wenhao Zhang   +7 more
wiley   +1 more source

Synthesis, cytotoxicity and antiviral evaluation of new series of imidazo[4,5-g]quinoline and pyrido[2,3-g]quinoxalinone derivatives [PDF]

open access: yes, 2015
Linear aromatic N-tricyclic compounds with promising antiviral activity and minimal cytotoxicity were prepared and analyzed in the last years. Specifically, the pyrido[2,3-g]quinoxalinone nucleus was found endowed with high potency against several ...
Briguglio, Irene   +14 more
core   +1 more source

High‐Efficiency and Long‐Lifetime Narrowband Green MR‐TADF OLEDs Enabled by Distinct Molecular Design Strategies

open access: yesJournal of the Society for Information Display, EarlyView.
Two complementary molecular design strategies are proposed to independently enhance operational stability and device efficiency in MR‐TADF OLEDs. Strengthening the cationic bond dissociation energy (BDEf+) improves intrinsic molecular robustness and prolongs device lifetime, although a PSF‐based efficiency‐oriented design with high molar absorption ...
Hai Truyen Dang   +4 more
wiley   +1 more source

2,3-Bis(4-bromophenyl)quinoxaline [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2007
The title compound, C(20)H(12)Br(2)N(2), was prepared by the reaction of 1-(3-bromo-phen-yl)-2-(4-bromo-phen-yl)ethane-1,2-dione with o-phenyl-enediamine in refluxing ethanol. In the mol-ecule, all bond lengths and angles are within normal ranges. The dihedral angle between the two benzene rings is 34.89 (1)°.
Fang-Fang Jian   +3 more
openaire   +3 more sources

Computer-guided design of novel nitrogen-based heterocyclic sphingosine-1-phosphate (S1P) activators as osteoanabolic agents

open access: yesEXCLI Journal : Experimental and Clinical Sciences
Osteoanabolic agents, or drugs that promote bone formation, have gained considerable attention for osteoporosis management due to their curative and preventive potentials.
Rattanawan Tangporncharoen   +5 more
doaj   +1 more source

Dimethyl‐, Diethyl‐, and Propylene Carbonates: An Emerging Class of Green Solvents for Organic Synthesis

open access: yesThe Chemical Record, EarlyView.
This review highlights recent advances in the use of organic carbonates, dimethyl carbonate (DMC), diethyl carbonate (DEC), and propylene carbonate (PC), as solvents in organic synthesis. Based on over seventy studies from the past 6 years, it shows their application in different organic reaction types, emphasizing their role in safer and more ...
Gabriela T. Quadros   +5 more
wiley   +1 more source

the very different redox behaviour of isoelectronic complexes with [PtCl2] and [AuCl2]+ [PDF]

open access: yes, 2011
The new, potentially ambidentate heterocyclic ligand 2,3-bis(1-methylimidazol-2-yl)quinoxaline (bmiq) was obtained from 2,3-bis(1-methylimidazol-2-yl)glyoxal and 1,2-diaminobenzene.
Bulak, Ece   +6 more
core   +1 more source

Large-Scale Solvent-Free Chlorination of Hydroxy-Pyrimidines, -Pyridines, -Pyrazines and -Amides Using Equimolar POCl3

open access: yesMolecules, 2012
Chlorination with equimolar POCl3 can be efficiently achieved not only for hydroxypyrimidines, but also for many other substrates such as 2-hydroxy-pyridines, -quinoxalines, or even -amides.
Zhihua Sun   +6 more
doaj   +1 more source

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