Ultrafast decay dynamics of photoexcited Cu(II)(TMpy-P4) in water solvent

被引：18

作者：

Jeoung, SC

Takeuchi, S

Tahara, T ^{[1
]}

Kim, D

机构：

[1] Inst Mol Sci, Okazaki, Aichi 4448585, Japan

[2] Korea Res Inst Stand & Sci, Natl Creat Res Initiat Ctr Ultrafast Opt Characte, Taejon 305600, South Korea

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 309卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(99)00700-9

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 [物理化学]; 081704 [应用化学];

摘要：

Femtosecond time-resolved absorption spectroscopy was employed to investigate the relaxation dynamics of photoexcited copper(II) tetrakis (4-N-methylpyridyl)porphyrin (Cu(II)(TMpy-pd)) in neat water. The transient absorption spectra and their temporal profiles show a strong pump-power dependence reflecting multiphoton ionization of water, which probably caused the discrepancies in the previous reports. Time-resolved transient absorption spectra were recorded under low pump-power condition to avoid the multiphoton effect. It was confirmed that the relaxation process finishes within 100 ps, exhibiting the double exponential recovery of Cu(II)(TMpy-P4) ground state. The relevant mechanism for the relaxation dynamics of photoexcited Cu(II)(TMpy-P4) in water was proposed. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：369 / 376

页数：8

共 25 条

[1]

ANTIPAS A, 1978, J AM CHEM SOC, V70, P1720

[2]

Dynamics of excited solvated electrons in aqueous solution monitored with femtosecond-time and polarization resolution [J].