Comparing photoinduced vibrational coherences in bacteriorhodopsin and in native and locked retinal protonated Schiff bases

被引：39

作者：

Hou, BX

Friedman, N

Ottolenghi, M

Sheves, M

Ruhman, S ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Dept Phys Chem, IL-91904 Jerusalem, Israel

[2] Hebrew Univ Jerusalem, Farkas Ctr Light Induced Proc, IL-91904 Jerusalem, Israel

[3] Weizmann Inst Sci, Dept Organ Chem, IL-76100 Rehovot, Israel

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 381卷 / 5-6期

基金：

以色列科学基金会;

关键词：

D O I：

10.1016/j.cplett.2003.10.038

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：

Low frequency excited state vibrational coherences induced by impulsive photoexcitation in bacteriorhodopsin are detected via femtosecond pump-probe spectroscopy, and compared with similar data in retinal protonated Schiff bases of native and locked retinals. At delays above similar to100 fs a single vibration below 200 fs dominates the detected spectral modulations. Its frequency of similar to120 in retinal protonated Schiff base is virtually unchanged by locking the C-13=C-14 bond in the trans or cis configurations, but is increased to 170 cm(-1) within the protein environment. The implications of this result on the part played by the protein in directing the reactivity of the retinal within bacteriorhodopsin is discussed. (C) 2003 Published by Elsevier B.V.

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收藏

页码：549 / 555

页数：7

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