Optical control of electrons during electron transfer

Citation
Ib. Martini et al., Optical control of electrons during electron transfer, SCIENCE, 293(5529), 2001, pp. 462-465
Citations number
22
Categorie Soggetti
Multidisciplinary,Multidisciplinary,Multidisciplinary
Journal title
SCIENCE
ISSN journal
00368075 → ACNP
Volume
293
Issue
5529
Year of publication
2001
Pages
462 - 465
Database
ISI
SICI code
0036-8075(20010720)293:5529<462:OCOEDE>2.0.ZU;2-X
Abstract
The dynamics of electron transfer reactions in solution can be controlled w ith the use of a sequence of femtosecond laser pulses. In the charge transf er to solvent (CTTS) reaction of sodide (Na-) in tetrahydrofuran, an initia l Light pulse Launched the CTTS reaction, ejecting an electron into either an immediate or a solvent-separated Na-o:solvated electron contact pair. A second pulse was used to excite the electrons in the contact pairs, and a t hird pulse monitored the amount of Na- produced through the back electron t ransfer. Excitation of the electrons in immediate contact pairs shut off th e back electron transfer, whereas excitation of the electrons in solvent-se parated pairs both enhanced and hindered the back electron transfer.