Conformational effects on the photoinduced proton-transfer processes in 1-methyl-2-(3′-hydroxy-2′-pyridyl)benzimidazole

1999 ◽  
Vol 1 (2) ◽  
pp. 253-260 ◽  
Author(s):  
M Carmen Ríos Rodríguez ◽  
Flor Rodríguez-Prieto ◽  
Manuel Mosquera
Keyword(s):  
Proton Transfer ◽  
Transfer Processes ◽  
Conformational Effects ◽  
Photoinduced Proton Transfer

Effects of Crystal Packing on Photoinduced Proton-Transfer Processes of 2,4-Dinitrobenzylpyridine Derivatives

1997 ◽  
Vol 53 (2) ◽  
pp. 306-316 ◽  
Author(s):  
S. Khatib ◽  
M. Botoshansky ◽  
Y. Eichen
Keyword(s):  
Proton Transfer ◽  
Crystal Packing ◽  
Aromatic Rings ◽  
Proton Abstraction ◽  
Thermally Activated ◽  
Transfer Processes ◽  
Highly Sensitive ◽  
Photoinduced Proton Transfer ◽  
Photochemical Properties

Photoinduced and thermally activated proton-transfer processes taking place in crystals of 2-(2,4-dinitrobenzyl)pyridine and some of its derivatives are highly sensitive to molecular packing. Small differences in the way the molecules are packed in the crystal are found to dominate molecular properties in controlling the photoactivity of the different phototautomers, leading, for example, to photoactive or photoinert systems. Three compounds, 2-(2,4-dinitrobenzyl)-4-methylpyridine, 1-(2,4-dinitrophenyl)-l-(2-pyridine)ethane and 4′-(2,4-dinitrobenzyl)-4-methyl-2,2′-bipyridine, having different photochemical properties, were prepared and their crystal structures characterized by means of X-ray analysis. In the photoinert crystals the 2,4-dinitrophenyl group is π-stacked with other aromatic rings of neighboring molecules. This arrangement may open some deactivation channels to the excited state which are faster than the proton-transfer process, leading to photoinert crystals. The absence of π-stacking between the chromophore and other aromatic rings leads to photoactive systems. An O atom of the o-nitro group is the only basic atom that is systematically found to interact with the abstracted proton. It seems that this atom is responsible for the photoinduced proton abstraction of the benzylic H atom, while the role of the N atom of the pyridine ring in the proton-abstraction process is mainly inductive.

Long-lived photoinduced proton transfer processes

1995 ◽  
pp. 713 ◽  
Author(s):  
Yoav Eichen ◽  
Jean-Marie Lehn ◽  
Michael Scherl ◽  
Dietrich Haarer ◽  
Roger Casalegno ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Transfer Processes ◽  
Photoinduced Proton Transfer

Dual fluorescence of 2-(2'-pyridyl)benzimidazole in aqueous solution due to photoinduced proton-transfer processes

1990 ◽  
Vol 94 (23) ◽  
pp. 8536-8542 ◽  
Author(s):  
Flor. Rodriguez Prieto ◽  
Manuel. Mosquera ◽  
Mercedes. Novo
Keyword(s):  
Aqueous Solution ◽  
Proton Transfer ◽  
Dual Fluorescence ◽  
Transfer Processes ◽  
Photoinduced Proton Transfer

Femtosecond dynamics of intramolecular photoinduced proton transfer in N-substituted 2-(2-aminophenyl)-4H-3,1-benzoxazin-4-ones

2010 ◽  
Vol 44 (6) ◽  
pp. 482-491 ◽  
Author(s):  
M. N. Khimich ◽  
F. E. Gostev ◽  
I. V. Shelaev ◽  
O. M. Sarkisov ◽  
E. A. Birgen ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Femtosecond Dynamics ◽  
Photoinduced Proton Transfer

Damaging Intermolecular Energy and Proton Transfer Processes in Alpha-Particle-Irradiated Hydrogen-Bonded Systems

2018 ◽  
Vol 130 (52) ◽  
pp. 17269-17273 ◽  
Author(s):  
Shenyue Xu ◽  
Dalong Guo ◽  
Xinwen Ma ◽  
Xiaolong Zhu ◽  
Wentian Feng ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Alpha Particle ◽  
Transfer Processes ◽  
Intermolecular Energy ◽  
Hydrogen Bonded Systems ◽  
Hydrogen Bonded

Deuterium isotope effect in proton transfer processes in a viscous medium

1990 ◽  
Vol 168 (5) ◽  
pp. 410-416 ◽  
Author(s):  
Alok Samanta ◽  
Swapan K. Ghosh ◽  
H.K. Sadhukhan
Keyword(s):  
Proton Transfer ◽  
Isotope Effect ◽  
Viscous Medium ◽  
Deuterium Isotope Effect ◽  
Transfer Processes

Kinetics of proton transfer processes

1965 ◽  
Vol 39 ◽  
pp. 7 ◽  
Author(s):  
M. Eigen
Keyword(s):  
Proton Transfer ◽  
Transfer Processes ◽  
Kinetics Of
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