PROBING BACTERIORHODOPSIN PHOTOCHEMISTRY WITH NONLINEAR OPTICS - COMPARING THE 2ND-HARMONIC GENERATION OF BR AND THE PHOTOCHEMICALLY INDUCED INTERMEDIATE-K

被引：12

作者：

BOUEVITCH, O

LEWIS, A

SHEVES, M

机构：

[1] HEBREW UNIV JERUSALEM, DIV APPL PHYS, IL-91904 JERUSALEM, ISRAEL

[2] WEIZMANN INST SCI, DEPT ORGAN CHEM, IL-76100 REHOVOT, ISRAEL

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 26期

关键词：

D O I：

10.1021/j100026a032

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 nonlinear optical properties of the bacteriorhodopsin chromophore in the bR568 and K states are investigated by second harmonic generation. The comparison of amplitudes and phases of the second-order nonlinear optical polarizabilities of the retinal chromophore in the two states has revealed a noticeable increase of the induced dipole of the retinal as a result of the bR568 --> K transition. The results have been explained in terms of recent theoretical understandings of the nonlinear optical properties of polyenes. Within the context of these understandings we have discussed the molecular origins of the light-induced color changes and the possible mechanism of photon energy storage observed in this protein.

引用

页码：10648 / 10657

页数：10

共 54 条

[1] C-13 NMR-STUDIES OF MODEL COMPOUNDS FOR BACTERIORHODOPSIN - FACTORS AFFECTING THE RETINAL CHROMOPHORE CHEMICAL-SHIFTS AND ABSORPTION MAXIMUM [J].