ChemInform Abstract: N-METHACRYLOYLOXYETHYL DERIVATIVES OF INDOLINE SPIROPYRANS CONTAINING ELECTRON-ACCEPTOR AND ELECTRON-DONOR SUBSTITUENTS

1978 ◽  
Vol 9 (31) ◽  
Author(s):  
S. I. BESHENKO ◽  
N. A. ZAICHENKO ◽  
V. V. BUZAEV ◽  
V. D. ERMAKOVA ◽  
M. I. CHERKASHIN
Keyword(s):  
Electron Donor ◽  
Electron Acceptor ◽  
Derivatives Of

Acyclic versus cyclic π-electron delocalization. How is the substituent effect related to π-electron delocalization?

2009 ◽  
Vol 74 (1) ◽  
pp. 115-129 ◽  
Author(s):  
Michał A. Dobrowolski ◽  
Jędrzej Kaniewski ◽  
Tadeusz M. Krygowski ◽  
Michał K. Cyrański
Keyword(s):  
Electron Donor ◽  
Electron Acceptor ◽  
Substituent Effect ◽  
Electron Donors ◽  
Electron Delocalization ◽  
Benzene Derivatives ◽  
Phenol Derivatives ◽  
Stabilization Energies ◽  
Derivatives Of ◽  
Substituted 1

Substituent effect stabilization energies were estimated for sets of 27 para-substituted phenol derivatives, meta- and para-homodisubstituted benzene derivatives, trans-substituted ethenes, 4-substituted 1-hydroxy-1,3-cyclohexadienes and 1,4-homodisubstituted 1,3-cyclohexadienes based on the optimizations at the B3LYP/6-311+G** DFT level of theory. The following substituents were taken into account: C≡CH, C(CN)3, CF3, CH2NH2, CH3, CH=CH2, CHO, Cl, CN, COCH3, COCl, CONH2, COOCH3, COOH, F, NH2, NHCH3, N(CH3)2, NHOH, NO, NO2, OCH3, OH, Ph, H, SH, SO2CN. For hydroxyethenes and phenol derivatives the electron-acceptor substituents stabilize the systems, whereas the electron-donors lead to their destabilization. Both electron-acceptor and electron-donor substituents destabilize homodisubstituted ethene and meta- and para-homodisubstituted benzene species. The strongest destabilization is observed for derivatives of ethene, a weaker one for derivatives of cyclohexadiene and the weakest for benzene derivatives.

Preponderant role of pentafluorophenyl moieties for tuning the electronic properties of extended benzodifuran-azomethine derivatives

2021 ◽  
Author(s):  
Chady Moussallem ◽  
Magali Allain ◽  
Frédéric Gohier ◽  
Pierre Frere
Keyword(s):  
Electronic Properties ◽  
Electron Donor ◽  
Electron Acceptor

From a central 3,7-bis(perfluorophenyl)-BDF unit, the extension performed with electron acceptor perfluorophenyl groups and/or electron donor N,N-dimethylamino groups via an imine link leads to symmetrical AAA and DAD or dissymmetrical...

Microbial Perchlorate Reduction in Groundwater with Different Electron Donors

2013 ◽  
Vol 295-298 ◽  
pp. 1402-1407
Author(s):  
Rui Wang ◽  
Ming Chen ◽  
Jia Wen Zhang ◽  
Fei Liu ◽  
Hong Han Chen
Keyword(s):  
Removal Efficiency ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Reduction Rate ◽  
Electron Donors ◽  
Monod Equation ◽  
Hydrogen Addition ◽  
Perchlorate Reduction ◽  
Perchlorate Removal

Effects of different electron donors (acetate and hydrogen), acetate and perchlorate concentrations on microbial perchlorate reduction in groundwater were studied. The results showed that acetate and hydrogen addition as an electron donor can significantly improve perchlorate removal efficiency while a longer period was observed for hydrogen (15 d) than for acetate (8 d). The optical ratio of electron donor (acetate)-to-electron acceptor (perchlorate) was approximately 1.65 mg COD mg perchlorate-1. The highest specific reduction rate of perchlorate was achieved at the acetate-to-perchlorate ratio of 3.80 mg COD mg perchlorate-1. The perchlorate reduction rates corresponded well to the theoretical values calculated by the Monod equation and the parameters of Ks and Vm were determined to be 15.6 mg L-1 and 0.26 d-1, respectively.

scholarly journals Syntheses and reductions of C-dimesitylboryl-1,2-dicarba-closo-dodecaboranes

2015 ◽  
Vol 44 (21) ◽  
pp. 9766-9781 ◽  
Author(s):  
Jan Kahlert ◽  
Lena Böhling ◽  
Andreas Brockhinke ◽  
Hans-Georg Stammler ◽  
Beate Neumann ◽  
...  
Keyword(s):  
Electron Donor ◽  
Electron Acceptor

An investigation ofC-dimesitylboryl-ortho-carboranes, 1-(BMes2)-2-R-1,2-C2B10H10(1and2), reveals that the carborane is the electron-acceptor and the mesityl group is the electron-donor in these dyads.

D-A type fluorophores with efficient dual-state emission for bioimaging at ultralow concentration

2021 ◽  
Author(s):  
Fuqing Yu ◽  
Haonan Zhao ◽  
Yingzhong Li ◽  
Guomin Xia ◽  
Hongming Wang
Keyword(s):  
Electron Donor ◽  
Electron Acceptor ◽  
Ultralow Concentration

Herein we demonstrate the synthesis and investigation of organic D-A type fluorophores, named Np-TPA and Np-2TPA, comprising of twisted triphenylamine (TPA) as electron-donor and planar 1,8-naphthalenimide (Np) as electron-acceptor. These...

Syntheses of a Series of Electron Donor and Electron Acceptor Derivatives

1993 ◽  
Vol 23 (9) ◽  
pp. 1339-1349 ◽  
Author(s):  
Christoph Hoefler ◽  
Nadeem A. Kizilbash ◽  
Carl C. Wamser
Keyword(s):  
Electron Donor ◽  
Electron Acceptor
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