Singlet excited state dynamics of uracil and thymine derivatives: A femtosecond fluorescence upconversion study in acetonitrile

被引：89

作者：

Gustavsson, Thomas ^{[1
]}

Sarkar, Nilmoni

Lazzarotto, Elodie

Markovitsi, Dimitra

Improta, Roberto

机构：

[1] CEA Saclay, CNRS, Lab Francis Perrin, DSM,DRECAM,SPAM,URA 2453, F-91191 Gif Sur Yvette, France

[2] Univ Naples Federico II, Dipartimento Chim, I-80126 Naples, Italy

[3] CNR, Ist Biostrutture & Bioimmagini, I-80134 Naples, Italy

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 429卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2006.08.058

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：

The excited state properties of uracil, thymine and four analogous uracil compounds have been studied in acetonitrile by steady-state and time-resolved spectroscopy. The excited state lifetimes were measured using femtosecond UV fluorescence upconversion. The excited state lifetimes of uracil and its 1- and 3-methyl substituted derivatives are well described by one ultrafast (<= 100 fs) component. Five substituted compounds show a more complex behavior, exhibiting longer excited state lifetimes and bi-exponential fluorescence decays. These longer decays are substantially faster in acetonitrile than in aqueous solution showing that the excited state deactivation mechanism is in part governed by the solvent. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：551 / 557

页数：7

共 35 条

[1] Singlet excited-state dynamics of 5-fluorocytosine and cytosine: An experimental and computational study [J].