Vibrational relaxation following ultrafast internal conversion: comparing IR and Raman probing

被引：79

作者：

Schrader, T ^{[1
]}

Sieg, A ^{[1
]}

Koller, F ^{[1
]}

Schreier, W ^{[1
]}

An, Q ^{[1
]}

Zinth, W ^{[1
]}

Gilch, P ^{[1
]}

机构：

[1] Univ Munich, Dept Phys, D-80538 Munich, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 392卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2004.05.090

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 [物理化学]; 081704 [应用化学];

摘要：

Femtosecond IR and Raman techniques are compared with respect to their abilities to monitor vibrational relaxation following ultrafast internal conversion. The study was performed on para-nitroaniline which undergoes sub-picosecond internal conversion to the ground state populating a variety of vibrational modes. The NO, stretch vibration at 1315 cm(-1) responds to the excitation by a strong red shift, visible in transient IR and Raman experiments. It is due to the off-diagonal anharmonic coupling with other modes. The population of the NO2 stretch mode itself can only be observed in the (anti-Stokes) Raman spectrum, whereas IR spectroscopy is superior in detecting the coupling induced shift. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：358 / 364

页数：7

共 28 条

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