EVALUATION OF ANISOTROPIC PHOTORESPONSES IN ULTRATHIN ORGANIC FILMS BY A HIGHLY SENSITIVE POLARIZED OPTICAL WAVE-GUIDE METHOD

Authors
SASAKI K NAGAMURA T
Citation
K. Sasaki et T. Nagamura, EVALUATION OF ANISOTROPIC PHOTORESPONSES IN ULTRATHIN ORGANIC FILMS BY A HIGHLY SENSITIVE POLARIZED OPTICAL WAVE-GUIDE METHOD, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 294, 1997, pp. 145-148
Citations number
6
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
294
Year of publication
1997
Pages
145 - 148
Database
ISI
SICI code
1058-725X(1997)294:<145:EOAPIU>2.0.ZU;2-O
Abstract
Highly sensitive polarized absorption measurement by the optical waveg uide (OWG) detection system was made to analyze the orientation of pho togenerated radicals in Langmuir-Blodgett (LB) films. The extinction c oefficient changes upon photoexcitation of specific ion-pair charge-tr ansfer complexes between two kinds of amphiphilic 4,4'-bipyridinium an d tetrakis[3,5-bis(trifluoromethyl)phenyl]borate were estimated by thi s system. Amphiphilic 4,4'-bipyridinium ions in LB films deposited dir ectly on an OWG showed different anisotropy from those deposited on an OWG covered with three monolayers of cadmium arachidate. The structur e of substituents also affected the orientation.