Ultrafast electron trapping in an aqueous NaCl-solution

被引：38

作者：

Assel, M ^{[1
]}

Laenen, R ^{[1
]}

Laubereau, A ^{[1
]}

机构：

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

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 289卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(98)00415-1

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 generation of solvated electrons in an aqueous solution of sodium chloride is studied by femtosecond pump-probe absorption spectroscopy in the VIS and NIR with polarization resolution. Our data give evidence that the photo detachment of electrons occurs via two photon absorption of intense 200 fs pump pulses at 310 nm to an excited charge-transfer-to-solvent (CTTS) state of the halide anion. The subsequent relaxation dynamics involves the population of the CTTS ground state with a time constant of 120 +/- 30 fs which is somewhat longer-lived (lifetime 670 +/- 80 fs), followed by the formation of a complex state (Cl:e(-)), from which the solvated electrons are ejected with a time constant of 7 +/- 1.5 ps and large quantum yield. (C) 1998 Elsevier Science B.V, All rights reserved.

引用

页码：267 / 274

页数：8

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