Photoionization dynamics of an aqueous iodide solution: the temperature dependence

被引：52

作者：

Iglev, H

Trifonov, A

Thaller, A

Buchvarov, I

Fiebig, T

Laubereau, A

机构：

[1] Tech Univ Munich, Dept Phys E11, D-85748 Garching, Germany

[2] Boston Coll, Eugene F Merkert Chem Ctr, Chestnut Hill, MA 02467 USA

[3] Univ Sofia, Fac Phys, Dept Quantum Elect, Sofia 1164, Bulgaria

来源：

CHEMICAL PHYSICS LETTERS | 2005年 / 403卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2005.01.014

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 report on the electron photodetachment dynamics after excitation at 242 nm of the lowest charge transfer state of aqueous I(-)at solution temperatures of 25, 50 and 75degreesC. A first intermediate is observed that builds up with a time constant of 220-180 fs in the investigated temperature interval and is assigned to an iodine:electron pair in a transient solvent configuration. Subsequent solvent reorganization leads to a quasi-equilibrated hydrated atom:electron pair (I:e(-))(hyd) that builds up with a time constant of 700-540 fs at 25-75degreesC. The following relaxation seems to be governed by partially diffusion-controlled recombination of the electron in the presence of an attraction potential well with depth of about 850 cm(-1). (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：198 / 204

页数：7

共 33 条

[1] Ultrafast electron trapping in an aqueous NaCl-solution [J].