2-PHOTON-INDUCED ANISOTROPIC TRANSIENT ABSORPTION IN BACTERIORHODOPSIN

被引：12

作者：

WAN, CZ

SONG, Q

JOHNSON, CK

机构：

[1] Department of Chemistry, University of Kansas, Lawrence

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 210卷 / 1-3期

关键词：

D O I：

10.1016/0009-2614(93)89106-R

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：

Two-photon excitation (TPE) of the photocycle of bacteriorhodopsin (BR) with 1064 nm pulses was observed, and the subsequent transient absorption and linear dichroism changes measured at 568 nm. An anisotropy of 0.55 was induced in the ground-state transition of BR. A theoretical formalism is described to treat the isotropic and anisotropic component of the two-photon absorptivity measured by a secondary transition dipole that is induced by TPE and probed by polarized fluorescence or transient-absorption methods. The two-photon tensor for BR is found to contain components that are not parallel to the one-photon transition dipole.

引用

收藏

页码：94 / 100

页数：7

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