FEMTOSECOND IMPULSIVE EXCITATION OF NONSTATIONARY VIBRATIONAL-STATES IN BACTERIORHODOPSIN

被引：133

作者：

DEXHEIMER, SL

WANG, Q

PETEANU, LA

POLLARD, WT

MATHIES, RA

SHANK, CV

机构：

[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720

[2] UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 188卷 / 1-2期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

D O I：

10.1016/0009-2614(92)85089-S

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：

Optical pulses of 12 fs duration are used to excite and probe nonstationary states in the photochemically active protein bacteriorhodopsin. Time-resolved differential transmittance measurements at 568, 620, and 656 nm reveal oscillations from coherent vibrational motion of the retinal chromophore as well as time-dependent changes reflecting its excited state dynamics and subsequent photochemistry. The oscillatory response is dominated by the nonstationary excitation of the ground state reactant, consistent with a resonant impulsive Raman process. Calculations based on this mechanism show good agreement with the results.

引用

页码：61 / 66

页数：6

共 19 条

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