Supramolecular chemistry of phthalocyanines.

• Other Authors: Leng, Xuebing.
• Format: Others
• Language: English; Chinese
• Published: 2007
• Subjects: Phthalocyanines; Supramolecular chemistry
• Online Access: http://library.cuhk.edu.hk/record=b6074206; http://repository.lib.cuhk.edu.hk/en/item/cuhk-343835

At the end of this thesis, selected 1H NMR spectra and crystallographic data are given as an Appendix. === Chapter 1 presents an overview of supramolecular chemistry and the general properties of phthalocyanines, focusing on the self-assembly of mixed porphyrin and phthalocyanine systems. === Chapter 2 describes the complexation of bis(pyridinolato) silicon(IV) phthalocyanines to several cobalt(II) porphyrins. As shown by absorption spectroscopy, both 1:1 and 1:2 molecular assemblies can be obtained depending on the relative amount of the two components and the position of the pyridyl ligand. The axially bound 1:1 phthalocyanine-porphyrin arrays have also been isolated and characterized spectroscopically. === Chapter 3 reports an extension of this work. Two novel phthalocyanines with 3 or 4 pyridyl axial substituents have been synthesized. These compounds bind to meso-tetraphenyl zinc porphyrin to form the corresponding tetrakis- and pentakis-mixed tetrapyrrole systems. === Chapter 4 discusses the preparation of several covalently-linked phthalocyanine-cyclodextrin conjugates. These compounds can form inclusion complexes with sulfonated porphyrin in water providing a new strategy to construct mixed phthalocyanine and porphyrin systems. === Chapter 5 reports the interactions of two octacarboxy phthalocyanines with beta-cyclodextrin. Through the formation of inclusion complexes, the latter serves as a disstacking agent reducing the aggregation tendency of these phthalocyanines. This supramolecular approach could be an effective way to generate hydrophilic and non-aggregated phthalocyanines, improving their photosensitising properties in aqueous media. === This thesis reports our investigation on the supramolecular chemistry of phthalocyanines. The first part of the thesis describes the self-assembly of mixed porphyrin and phthalocyanine systems through axial coordination. The second part complexes between phthalocyanines and reports the formation of some novel inclusion phthalocyanine-cyclodextrin conjugates and porphyrins, beta-cyclodextrin. === Leng, Xuebing. === "March 2007." === Adviser: Dennis K. P. Ng. === Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5946. === Thesis (Ph.D.)--Chinese University of Hong Kong, 2007. === Includes bibliographical references. === Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. === Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. === Abstract in English and Chinese. === School code: 1307.