Optical studies on composite Langmuir-Blodgett films containing ytterbium bis-phthalocyanine

RAY, A. K., NABOK, A. V., HASSAN, A. K., SILVER, J., MARSH, P. and RICHARDSON, T. (1999). Optical studies on composite Langmuir-Blodgett films containing ytterbium bis-phthalocyanine. Philosophical Magazine B-Physics of Condensed Matter Statistical Mechanics Electronic Optical and Magnetic Properties, 79 (7), 1005-1019.

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Abstract

Langmuir films of pure ytterbium bis-phthalocyanine (YbPc2) molecules and its mixtures with calix[4]resorcinarene (C[4]RA) molecules were studied by UVvis absorption spectra and surface pressure-area (Pi-A) isotherm measurements. Langmuir-Blodgett (LB) films of both pure YbPc2 and YbPc2-C[4]RA mixtures were produced and characterized with UV-vis spectra and surface plasmon resonance (SPR). In the case of LB films of pure YbPc2 molecules, values of 1.68 x 10(7) m(-1) and 1.76% were found for the absorption coefficient at spectral maxima and the reflectance loss. Mixed YbPc2-C[4]RA films give smaller values depending on the mixing ratio. SPR measurements, made in two media with different refractive indices, yielded accurate values of thickness of 2.06 +/- 0.06 nm and refractive index of 1.70 +/- 0.02 for LB films of pure YbPc2 molecules. Electrochromic effects, driven by electrochemical oxidation/reduction of the Yb central atom, were registered in LB films of pure YbPc2 molecules by both UV-vis absorption spectra and SPR measurements.

Item Type:	Article
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Electronic Materials and Sensors Research Group
Identification Number:	https://doi.org/10.1080/13642819908214856
Page Range:	1005-1019
Depositing User:	Helen Garner
Date Deposited:	20 May 2010 15:43
Last Modified:	18 Mar 2021 21:15
URI:	https://shura.shu.ac.uk/id/eprint/2000

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