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

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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
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Dokumententyp:
Wissenschaftliche Abschlussarbeiten » Dissertation
Fakultät / Institut:
Fakultät für Chemie
Dewey Dezimal-Klassifikation:
500 Naturwissenschaften und Mathematik » 540 Chemie » 540 Chemie und zugeordnete Wissenschaften
Stichwörter:
aggregation, g-cyclodextrin, aerosol-OT, circular dichroism, alginates, Pinacyanol chloride, PeakFit, OSCI
Beitragende:
Prof. Dr. rer. nat. em. Buß, Volker [Betreuer(in), Doktorvater]
Prof. Dr. Döpp, Dietrich [Gutachter(in), Rezensent(in)]
Sprache:
Deutsch
Kollektion / Status:
Dissertationen / Dokument veröffentlicht
Datum der Promotion:
10.04.2003
Dokument erstellt am:
10.04.2003
Dateien geändert am:
01.08.2013
Medientyp:
Text