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
| Identifer | oai:union.ndltd.org:DUETT/oai:DUETT:duett-05062003-112253 |
| Date | 07 May 2003 |
| Creators | Al-Khouri, Sa'ib |
| Contributors | Prof. Dr. Volker Buß, Prof. Dr. Dietrich Döpp |
| Publisher | Gerhard-Mercator-Universitaet Duisburg |
| Source Sets | Dissertations and other Documents of the Gerhard-Mercator-University Duisburg |
| Language | German |
| Detected Language | English |
| Type | text |
| Format | text/html, application/pdf |
| Source | http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-05062003-112253/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. Hiermit erteile ich der Universitaet Duisburg das nicht-ausschliessliche Recht unter den unten angegebenen Bedingungen, meine Dissertation, Staatsexamens- oder Diplomarbeit, meinen Forschungs- oder Projektbericht zu veroeffentlichen und zu archivieren. Ich behalte das Urheberrecht und das Recht das Dokument zu veroeffentlichen und in anderen Arbeiten weiterzuverwenden. |
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