UV/Vis and CD Spectral Studies of the Interaction between Pinacyanol Chloride and Alginates, g-Cyclodextrin, and Aerosol-OT

by Al-Khouri, Sa'ib

Abstract (Summary)
A quantitative study of the aggregation behaviour of the cationic cyanine dye pinacyanol chloride in aqueous solution and in the presence of various organic matrices (anionic alginates, anionic Aerosol-OT and g-cyclodextrin) is presented based on UV/Visible absorption and Circular Dichroism (CD) spectroscopy. The spectral data have been analysed using derivative spectra and a program (PeakFit) to model the mixtures of different absorbing species with strongly overlapping absorption bands. The structures of the aggregates have been analysed and discussed in terms of qualitative (H- vs. J-type aggregation) and quantitative arguments based on a program (OSCI) for the calculation of oscillator and rotatory strengths assuming an exciton-like delocalisation of molecular excitations through the entire aggregate. Models for the various complexes of the dye in the presence of various organic matrices have been proposed
Bibliographical Information:

Advisor:Prof. Dr. Volker Buß; Prof. Dr. Dietrich Döpp

School:Universität Duisburg-Essen, Standort Essen

School Location:Germany

Source Type:Master's Thesis

Keywords:chemie universitaet duisburg essen


Date of Publication:05/07/2003

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