VIBRATIONAL-RELAXATION OF BULK MODES PERTURBED BY ELECTRONIC-STATE OF DILUTE IMPURITIES

被引：4

作者：

CHANG, TC ^{[1
]}

CHOU, SH ^{[1
]}

LI, HW ^{[1
]}

LIN, SH ^{[1
]}

机构：

[1] ARIZONA STATE UNIV, DEPT CHEM & BIOCHEM, TEMPE, AZ 85287 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 1993年 / 99卷 / 04期

关键词：

D O I：

10.1063/1.465186

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 dephasing of the 1385 cm-1 vibron of host molecules (naphthalene) perturbed by electronically excited guest molecules (pentacene) was studied by the time-resolved coherent Stokes Raman spectroscopy (CSRS) in the temperature region of 6-26 K. The decay time was faster when the excitation frequency was tuned from the off-resonance to the resonance of the electronic transition of pentacene. For the resonance case, longer decay times were observed at higher temperatures (approximately 26 K) than at low temperatures (approximately 6 K). Two possible mechanisms were considered for the inverse temperature behavior. The shorter decay time in the impurity perturbed domains may be attributed to the increase of a coupling strength on the decay channel from 1385 cm-1 mode to 1365 cm-1 mode by stimulating phonon emission.

引用

页码：2781 / 2785

页数：5

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