DIRECT OBSERVATION OF ULTRAFAST ENERGY-TRANSFER IN PSI CORE ANTENNA

被引：78

作者：

DU, M

XIE, XL

JIA, YW

METS, L

FLEMING, GR

机构：

[1] PACIFIC NW LAB, RES CTR, RICHLAND, WA 99352 USA

[2] UNIV CHICAGO, JAMES FRANCK INST, CHICAGO, IL 60637 USA

[3] UNIV CHICAGO, DEPT MOLEC GENET & CELL BIOL, CHICAGO, IL 60637 USA

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 201卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(93)85113-3

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：

A femtosecond fluorescence upconversion apparatus was used to measure the fluorescence decay in the PSI core antenna of a PSI-only mutant of Chlamydomonas reinhardtii. The fluorescence depolarization measurements reveal a fast depolarization with a time constant in the range of 150-300 fs irrespective of the excitation and/or detection wavelengths. We associate this time with the energy transfer timescale. The isotropic fluorescence decay shows a decay component of almost-equal-to 5 ps and is suggested to result from spectral equilibration within the antenna.

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页码：535 / 542

页数：8

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