Site-specific excited-state solute-solvent interactions probed by femtosecond vibrational spectroscopy

被引：147

作者：

Chudoba, C ^{[1
]}

Nibbering, ETJ ^{[1
]}

Elsaesser, T ^{[1
]}

机构：

[1] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.81.3010

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Solute-solvent interactions in liquids are studied by femtosecond vibrational spectroscopy. Upon electronic excitation, the C=O stretching band of an organic probe molecule, a coumarin dye, dissolved in CHCl3 shows a strong blueshift on a 200 fs time scale. This demonstrates for the first time the cleavage of a site-specific intermolecular hydrogen bond with a polar solvent. After this fast process, the picosecond reorganization of the solvent due to dielectric relaxation is directly monitored via changes of the C=O vibrational frequency.

引用

页码：3010 / 3013

页数：4

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