Evidence for the phantom state in photoinduced cis-trans isomerization of stilbene

被引：90

作者：

Kovalenko, S. A. ^{[1
]}

Dobryakov, A. L. ^{[1
]}

Ioffe, I. ^{[1
]}

Ernsting, N. P. ^{[1
]}

机构：

[1] Humboldt Univ, Dept Chem, D-12489 Berlin, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2010年 / 493卷 / 4-6期

关键词：

TIME-RESOLVED ABSORPTION; EXCITED-STATE; DYNAMICS; FEMTOSECOND; PHOTOISOMERIZATION; ACETONITRILE; SPECTROSCOPY; IONIZATION; DEPENDENCE; CONVERSION;

D O I：

10.1016/j.cplett.2010.05.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Transient absorption spectra of cis-stilbene in solution, recorded in the range 275-690 nm with 80 fs instrument response, reveal two successive evolving bands. One at 630 nm decays on a subpicosecond scale; it corresponds to vertically-excited nearly planar S(1) state. The other, growing and decaying band at 340 nm, is shown to be consistent with theoretically predicted phantom state p* of perpendicular molecular geometry. The lifetime of p* is determined to be tau(p*) = 0.4 ps in acetonitrile and 0.3 ps in hexane. (C) 2010 Elsevier B. V. All rights reserved.

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页码：255 / 258

页数：4

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