Ultrafast quenching of the excited S2 state of benzopyranthione by acetonitrile

被引：26

作者：

Burdzinski, G

Maciejewski, A

Buntinx, G

Poizat, O

Lefumeux, C

机构：

[1] Adam Mickiewicz Univ Poznan, Fac Phys, Quantum Elect Lab, PL-61614 Poznan, Poland

[2] Adam Mickiewicz Univ Poznan, Fac Chem, Photochem Lab, PL-60780 Poznan, Poland

[3] Adam Mickiewicz Univ Poznan, Ctr Ultrafast Laser Spect, Poznan, Poland

[4] Univ Lille 1, Ctr Etude & Rech Lasers & Applicat, CNRS, LASIR, F-59655 Villeneuve Dascq, France

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 384卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2003.12.029

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：

Femtosecond and nanosecond transient absorption and picosecond time-correlated single photon counting techniques have been used to study the mechanism and dynamics of the efficient quenching of an aromatic thioketone, 4H-1-benzopyrane-4-thione (BPT) in the S-2 state, by acetonitrile. The results suggest the involvement of two aborted processes in the quenching mechanism: exciplex formation and hydrogen abstraction. The occurrence of the latter process is supported by the observation of a clear isotope effect on going from acetonitrile to deuterated acetonitrile. (C) 2003 Elsevier B.V. All rights reserved.

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页码：332 / 338

页数：7

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