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Study of Anisotropic Interfacial Electron Transfer Across a Semiconductor/Solution Interface by Time‐Resolved EPR Spectroscopy
Author(s) -
Akiyama Kimio,
Hashimoto Shinji,
Tojo Sachiko,
Ikoma Tadaaki,
TeroKubota Shozo,
Majima Tetsuro
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200461681
Subject(s) - electron paramagnetic resonance , semiconductor , spectroscopy , excited state , electron transfer , spectral line , materials science , anisotropy , electron , range (aeronautics) , chemistry , molecular physics , photochemistry , atomic physics , optoelectronics , optics , nuclear magnetic resonance , physics , quantum mechanics , astronomy , composite material
Xanthene dyes absorbed onto colloidal TiO 2 exhibit spin‐polarized EPR spectra when excited with pulses of visible light at low temperatures (see schematic representation). Analysis of the spectra enables the range of distances between the electron and the dye radical cation as well as their relative orientations to be determined. Furthermore, an orientational selectivity in electron transfer across the semiconductor nanoparticle is observed.