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Title: Tin(IV) porphyrins as building blocks for supramolecular chemistry
Author: Hawley, J. C.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 1998
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Chapter 1 provides an overview of the properties of metalloporphyrins and an insight into the potential for their use in molecular recognition. A more detailed summary of the chemistry of Sn(II) and Sn(IV) porphyrins is also presented. In Chapter 2 general methods for the preparation of Sn(IV) dihydroxo and dicarboxylate porphyrins, and the synthesis of the Sn(IV) porphyrin host molecules investigated in this study are described. Details of the spectroscopic characteristics of Sn(IV) porphyrins are included. 1H NMR spectroscopy experiments undertaken to gain a greater understanding of the Sn(IV) porphyrin carboxylate binding interaction are reported in Chapter 3. The results of this work and parallel correlations observed in 1H NMR spectroscopy and X-ray structure parameters of Sn(IV) dicarboxylate porphyrins are related to a proposed mechanism for the binding of carboxylates to Sn(IV) dihydroxo porphyrins, and a rationale of the equilibrium between carboxylic acids and Sn(IV) dihydroxo porphyrins. The exploration through 1H NMR spectroscopic experiments of the binding site and kinetic/thermodynamic preferences of carboxylates in coordinating Sn(IV) dihydroxo cyclic porphyrin oligomers is described in Chapter 4. Descriptions of the assignment of 2D NMR spectra of dicarboxylate complexes of Sn(IV) porphyrin oligomers and the consequent interpretation of the structure of such complexes are presented. Attempts to prepare a Sn(IV) porphyrin receptor molecule via the cyclisation of a linear porphyrin trimer under Glaser-Hay conditions and the difficulties thereby encountered are discussed in Chapter 5.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available