EVIDENCE FOR INTERMOLECULAR HYDROGEN-BOND REARRANGEMENT IN THE ELECTRON-TRANSFER DYNAMICS OF BETAINE-30 IN N-BUTANOL

被引：27

作者：

REID, PJ ^{[1
]}

ALEX, S ^{[1
]}

JARZEBA, W ^{[1
]}

SCHLIEF, RE ^{[1
]}

JOHNSON, AE ^{[1
]}

BARBARA, PF ^{[1
]}

机构：

[1] UNIV MINNESOTA,DEPT CHEM,MINNEAPOLIS,MN 55455

来源：

CHEMICAL PHYSICS LETTERS | 1994年 / 229卷 / 1-2期

关键词：

D O I：

10.1016/0009-2614(94)01017-X

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：

The electron transfer and ground-state solvation dynamics of betaine-30 (B-30) in n-butanol at low temperatures are investigated by femtosecond pump-probe spectroscopy. Two separate components of the solvent response to solute excitation are observed. At higher temperatures (292-273 K), spectral evolution corresponding to diffusional solvation is evident. However, low-temperature studies (273-193 K) show the presence of a second process characterized by a approximate to 100 ps decay time and weak temperature dependence demonstrating that specific intermolecular hydrogen-bond dynamics are involved in the solvation of B-30 in protic solvents.

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页码：93 / 100

页数：8

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