Isotopomer-selective overtone spectroscopy by ionization detected IR+UV double resonance of jet-cooled aniline

被引：39

作者：

Fehrensen, B ^{[1
]}

Hippler, M ^{[1
]}

Quack, M ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Phys Chem Lab, CH-8092 Zurich, Switzerland

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 298卷 / 4-6期

关键词：

D O I：

10.1016/S0009-2614(98)01216-0

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：

We report the analysis of the NH-stretching overtone absorption of gas-phase aniline C(6)H(5)NH(2) and C(6)H(5)NHD between 6500 and 7100 cm(-1). Spectra of jet-cooled aniline are obtained by a new IR + UV double resonance scheme, where vibrationally excited aniline is ionised by resonantly enhanced two-photon ionisation via hot-hands of the S(1) <-- S(0) transition. Ionisation detection in a time-of-flight mass spectrometer allows observing isotopomer-selective overtone spectra (ISOS), for example of C(6)H(5)NHD, which occurs in a mixture with C(6)H(5)NH(2) and C(6)H(5)ND(2). For C(6)H(5)NH(2), a strong Fermi resonance between the symmetric MI-stretching and the symmetric NH-bending vibration is identified, with a coupling matrix element W approximate to 47 cm(-1). Fire also discuss the interplay of stereomutation on the femtosecond timescale and excitation of high-frequency stretching modes. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：320 / 328

页数：9

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