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Title: Ring distortions and nano-architecture formed by purpose designed phthalocyanines
Author: Isare, Benjamin Albert Louis.
ISNI:       0000 0001 3587 2034
Awarding Body: University of East Anglia
Current Institution: University of East Anglia
Date of Award: 2004
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Phthalocyanines are a class of compounds intensively studied because of their intense blue/green colour. The discovery, the synthesis and some of their applications are described in Chapter 1. A number of crystal structures have been published in the past. In chapter 2, a comparison study discusses the effect of the substituents (linear such as n-hexyl or branched such as iso-pentyl) and the central ion (zinc, nickel, lead and free base) on molecular structure and packing. Crystal structures have been obtained and a UV-Vis study in solution and in the solid state as well as Non Linear Optical measurements in solution and in the solid state have been carried out. Phthalocyanine arrays containing well-defined scaffolds and support architectures are currently being investigated for NLO, molecular-electronics and sensor-device applications. In two different approaches, the synthesis of oligomeric and macromolecular arrays from a single mono-functionalised phthalocyanine has been investigated. In the first the synthesis was attempted of a well-defined structure of oligomeric polyisocyanide Pc that should arise from the synthesis of a peripheral isocyanide-dipeptide substituent which, when polymerised, should afford a rigid, helical polymeric backbone for the phthalocyanine array. In the second the synthesis was attempted of a hexameric macromolecular species affording a defined macromolecular system designed to exhibit properties mediated by both inter- and intramolecular phthalocyanine interactions. The results are presented together in Chapter 3. Chapter 4 reports the discovery that spin coated films of 1,4,8,11,15,18,22,25- octakis(hexyl)phthalocyaninato lead (Il) can be used as a medium for the source of Pb2 for the formation of PbS nanoparticles when exposed to H2S gas. It has been demonstrated that the formation of CdS nanoparticles can be carried out following the same procedure. The synthesis and characterisation of CdS and PbS nanoparticles is discussed.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available