SUBPICOSECOND VIBRATIONAL-RELAXATION OF SKELETAL MODES IN POLYATOMIC-MOLECULES

被引：40

作者：

HUBNER, HJ ^{[1
]}

WORNER, M ^{[1
]}

KAISER, W ^{[1
]}

SEILMEIER, A ^{[1
]}

机构：

[1] UNIV BAYREUTH,INST PHYSIOL,W-8580 BAYREUTH,GERMANY

来源：

CHEMICAL PHYSICS LETTERS | 1991年 / 182卷 / 3-4期

关键词：

D O I：

10.1016/0009-2614(91)80221-I

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：

Vibrational modes in the electronic ground state between 1300 and 1800 cm-1 are resonantly excited by tunable, ultrashort infrared pulses and the change of the population is monitored by a second (visible) pulse promoting the vibrationally excited molecules to a fluorescing electronic state. The fluorescence signal gives information on the lifetime of the individual vibrations. Data are presented for a solution of coumarin 6 in C2Cl4, where population lifetimes of several tenths of a picosecond for skeletal modes and of 2 ps for the C = O stretching mode are observed. The intermolecular transfer of vibrational excess energy to the solvent occurs with a time constant of 7 ps.

引用

页码：315 / 320

页数：6

共 18 条

[1]

BAKKER HJ, 1990, ULTRAFAST PHENOMEN 7, V53, P462

[2]

BOUWMAN WG, UNPUB

[3] GENERATION OF TUNABLE PICOSECOND PULSES IN THE MEDIUM INFRARED BY DOWN-CONVERSION IN AGGAS2 [J].