Excited-state processes in protochlorophyllide a a femtosecond time-resolved absorption study

被引：30

作者：

Dietzek, B

Maksimenka, R

Siebert, T

Birckner, E

Kiefer, W

Popp, J

Hermann, G

Schmitt, M

机构：

[1] Univ Jena, Inst Chem Phys, D-07743 Jena, Germany

[2] Univ Wurzburg, Inst Chem Phys, D-97074 Wurzburg, Germany

[3] Univ Jena, Inst Biophys & Biochem, D-07743 Jena, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 397卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2004.08.075

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 excited-state dynamics of protochlorophyllide a, a porphyrine like compound and precursor of the chlorophyll biosynthesis, was studied by femtosecond absorption spectroscopy. Three kinetic components with time constants of 4, 27 and 200 ps are found to be involved in the excited-state decay. According to similar kinetic processes observed in the ultrafast dynamics of prophyrins, the 4-ps component is attributed to vibrational relaxation leading to thermal equilibrium in the lowest excited singlet state. The 27-and 200-ps processes are suggested to correspond with the decay via a second decay channel into the electronic ground state. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：110 / 115

页数：6

共 20 条

[1] Ultrafast dynamics of Porphyrins in the condensed phase: I. Free base tetraphenylporphyrin [J].