Further optical studies on Langmuir-Blodgett films of octa-substituted metal-free phthalocyanines

NABOK, A. V., RAY, A. K., HASSAN, A. K., TRAVIS, J. R. and COOK, M. J. (1997). Further optical studies on Langmuir-Blodgett films of octa-substituted metal-free phthalocyanines. Supramolecular science, 4 (3-4), 407-411.

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Abstract

Ellipsometry and optical spectroscopy in the ultraviolet-visible (UV-vis.) and infra-red ranges were used to study the correlation between structure and optical properties of Langmuir-Blodgett (LB) films of octa-substituted metal-free phthalocyanines containing different alkyl chains. The thickness and refractive index of LB films and the orientation of phthalocyanine moieties in the monolayer were obtained from ellipsometric measurements and then data were compared with those from II/A isotherms of the floating layer. UV-vis. absorption spectra of LB films of the molecules show Davydov splitting of the Q band. Small changes in alkyl length lead to significant changes in the Q-band shape. The optical characteristics of monolayers are found to be different from those of multilayer films. (C) 1997 Elsevier Science Ltd. All rights reserved.

Item Type:	Article
Additional Information:	6th European Conference on Organised Films SEP 11-14, 1996, SHEFFIELD, ENGLAND
Research Institute, Centre or Group:	Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group
Identification Number:	10.1016/S0968-5677(97)00022-9
Depositing User:	Ann Betterton
Date Deposited:	01 Apr 2010 15:50
Last Modified:	13 Sep 2010 10:25
URI:	http://shura.shu.ac.uk/id/eprint/1426

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