EXCITON DYNAMICS IN THE LIGHT-HARVESTING COMPLEXES OF RHODOBACTER-SPHAEROIDES

被引：62

作者：

PULLERITS, T ^{[1
]}

CHACHISVILIS, M ^{[1
]}

JONES, MR ^{[1
]}

HUNTER, CN ^{[1
]}

SUNDSTROM, V ^{[1
]}

机构：

[1] UNIV SHEFFIELD,KREBS INST BIOMOLEC RES,SHEFFIELD S10 2UH,ENGLAND

来源：

CHEMICAL PHYSICS LETTERS | 1994年 / 224卷 / 3-4期

关键词：

D O I：

10.1016/0009-2614(94)00561-3

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：

We have used almost-equal-to 40 fs pulses from a Ti: Sa laser to investigate the ultrafast energy transfer and relaxation dynamics in the LH1 and LH2 light-harvesting pigment-proteins of photosynthetic purple bacteria. Our results reveal a new feature, not earlier observed in light-harvesting pigments, ultrafast relaxation characterized by a time constant of approximately 20 fs, which we interpret as interexciton state relaxation. The experimental results are compared with computer simulations of transient excited state absorption from the excited states of an excitonic aggregate.

引用

页码：355 / 365

页数：11

共 35 条

[1]

AGRANOVICH VM, 1982, ELECTRONIC EXCITATIO

[2] DEPENDENCE OF THE COHERENCE SPIKE ON THE MATERIAL DEPHASING TIME IN PUMP PROBE EXPERIMENTS [J].

BALK, MW ;

FLEMING, GR .

JOURNAL OF CHEMICAL PHYSICS, 1985, 83 (09) :4300-4307

[3] ENERGY-TRANSFER AND EXCITON-STATE RELAXATION PROCESSES IN ALLOPHYCOCYANIN [J].

BECK, WF ;

SAUER, K .

JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (11) :4658-4666

[4] FEMTOSECOND PHOTON-ECHOES FROM MOLECULES IN SOLUTION [J].

BECKER, PC ;

FRAGNITO, HL ;

BIGOT, JY ;

CRUZ, CHB ;

FORK, RL ;

SHANK, CV .

PHYSICAL REVIEW LETTERS, 1989, 63 (05) :505-507

[5] STRUCTURAL CHARACTERIZATION OF THE B800-850 AND B875 LIGHT-HARVESTING ANTENNA COMPLEXES FROM RHODOBACTER-SPHAEROIDES BY ELECTRON-MICROSCOPY [J].

BOONSTRA, AF ;

VISSCHERS, RW ;

CALKOEN, F ;

VANGRONDELLE, R ;

VANBRUGGEN, EFJ ;

BOEKEMA, EJ .

BIOCHIMICA ET BIOPHYSICA ACTA, 1993, 1142 (1-2) :181-188

[6] VIBRATIONAL DYNAMICS IN THE LIGHT-HARVESTING COMPLEXES OF THE PHOTOSYNTHETIC BACTERIUM RHODOBACTER-SPHAEROIDES [J].

CHACHISVILIS, M ;

PULLERITS, T ;

JONES, MR ;

HUNTER, CN ;

SUNDSTROM, V .

CHEMICAL PHYSICS LETTERS, 1994, 224 (3-4) :345-351

[7]

Davydov A. S, 1971, THEORY MOL EXCITONS

[8] LINE WIDTHS OF 3800 A SINGLET TRANSITIONS IN CRYSTALLINE ANTHRACENE [J].

DISSADO, LA .

CHEMICAL PHYSICS, 1975, 8 (03) :289-303

[9] *ZWISCHENMOLEKULARE ENERGIEWANDERUNG UND FLUORESZENZ [J].

FORSTER, T .

ANNALEN DER PHYSIK, 1948, 2 (1-2) :55-75

[10] PICOSECOND DYNAMICS OF DIRECTED EXCITATION TRANSFER IN SPECTRALLY HETEROGENEOUS LIGHT-HARVESTING ANTENNA OF PURPLE BACTERIA [J].

FREIBERG, A ;

GODIK, VI ;

PULLERITS, T ;

TIMPMAN, K .

BIOCHIMICA ET BIOPHYSICA ACTA, 1989, 973 (01) :93-104

← 1 2 3 4 →