skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ultrafast electron localization dynamics following photo-induced charge transfer

Abstract

Molecular dynamics occurring in the earliest stages following photo-induced charge transfer were investigated. Femtosecond time-resolved absorption anisotropy measurements on [Ru(bpy) 3 ] 21, where bpy is2,29-bipyridine, reveal a time dependence in nitrile solutions attributed to initial delocalization of the excited state over all three ligands followed by charge localization onto a single ligand. The localization process is proposed to be coupled to nondiffusive solvation dynamics. In contrast, measurements sampling population dynamics show spectral evolution associated with wave packet motion on the excited state surface that is independent of solvent. The results therefore reveal two important contributions to the evolution of charge transfer states in condensed phase, one that is strongly coupled to the surrounding environment and another that follows a potential internal to the molecule.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab., CA (US)
Sponsoring Org.:
USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (US)
OSTI Identifier:
783516
Report Number(s):
LBNL-47916
Journal ID: ISSN 0193-4511; SCEHDK; R&D Project: 505801; TRN: AH200128%%67
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Science
Additional Journal Information:
Journal Volume: 289; Journal Issue: 5481; Other Information: Journal Publication Date: Aug. 11, 2000; PBD: 1 Jun 2000; Journal ID: ISSN 0193-4511
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ANISOTROPY; EXCITED STATES; SAMPLING; SOLVATION; TIME DEPENDENCE; WAVE PACKETS; PHOTONS; RUTHENIUM COMPOUNDS; BIPYRIDINES; ELECTRON TRANSFER

Citation Formats

Yeh, Alvin T., Shank, Charles V., and McCusker, James K. Ultrafast electron localization dynamics following photo-induced charge transfer. United States: N. p., 2000. Web. doi:10.1126/science.289.5481.935.
Yeh, Alvin T., Shank, Charles V., & McCusker, James K. Ultrafast electron localization dynamics following photo-induced charge transfer. United States. doi:10.1126/science.289.5481.935.
Yeh, Alvin T., Shank, Charles V., and McCusker, James K. Thu . "Ultrafast electron localization dynamics following photo-induced charge transfer". United States. doi:10.1126/science.289.5481.935.
@article{osti_783516,
title = {Ultrafast electron localization dynamics following photo-induced charge transfer},
author = {Yeh, Alvin T. and Shank, Charles V. and McCusker, James K.},
abstractNote = {Molecular dynamics occurring in the earliest stages following photo-induced charge transfer were investigated. Femtosecond time-resolved absorption anisotropy measurements on [Ru(bpy) 3 ] 21, where bpy is2,29-bipyridine, reveal a time dependence in nitrile solutions attributed to initial delocalization of the excited state over all three ligands followed by charge localization onto a single ligand. The localization process is proposed to be coupled to nondiffusive solvation dynamics. In contrast, measurements sampling population dynamics show spectral evolution associated with wave packet motion on the excited state surface that is independent of solvent. The results therefore reveal two important contributions to the evolution of charge transfer states in condensed phase, one that is strongly coupled to the surrounding environment and another that follows a potential internal to the molecule.},
doi = {10.1126/science.289.5481.935},
journal = {Science},
issn = {0193-4511},
number = 5481,
volume = 289,
place = {United States},
year = {2000},
month = {6}
}