Dynamics of Carbocation Formation in the Photolysis of 1,2,2,3-Tetramethyl-1,2-Dihydroquinoline in Alcohols

被引：2

作者：

Lygo, O. N. ^{[1
]}

Shelaev, I. V. ^{[2
]}

Gostev, F. E. ^{[2
]}

Nekipelova, T. D. ^{[1
]}

Khodot, E. N. ^{[3
]}

Kuzmin, V. A. ^{[1
]}

Sarkisov, O. M. ^{[2
]}

机构：

[1] Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119334, Russia

[2] Russian Acad Sci, NN Semenov Chem Phys Inst, Moscow 119991, Russia

[3] Russian Acad Sci, Zelinsky Inst Organ Chem, Moscow 119991, Russia

来源：

HIGH ENERGY CHEMISTRY | 2012年 / 46卷 / 01期

关键词：

PROTON-TRANSFER; PHOTOINDUCED ADDITION; EXCITED MOLECULES; DOUBLE-BOND; 1,2-DIHYDROQUINOLINES; METHANOL; REACTIVITY; MECHANISM; SOLVENT; WATER;

D O I：

10.1134/S0018143912010146

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Dynamics of the formation of the carbocation in the ground state as a result of photoinduced proton transfer from a solvent to the excited state of 1,2,2,3-tetramethyl-1,2-dihydroquinoline (3MDHQ) in MeOH and 2,2,2-trifluoroethanol (TFE) was registered by pump-probe laser photolysis (lambda(pump) = 310 nm) with femtosecond time resolution. The lifetimes of the excited singlet state of 3MDHQ tau = 115 and 780 ps were determined in TFE and MeOH, respectively. The transient species with absorption spectrum corresponding to the spectrum of the carbocation from 3MDHQ (lambda(max) = 480 nm) is generated at time delays lower than 500 fs from the unrelaxed excited singlet state.

引用

页码：34 / 37

页数：4

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