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Title: Field desorption mass spectrometry applied to polymers and compounds relevant to their synthesis
Author: Taylor, M. J.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1995
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Early chapters contain (i) a comprehensive survey of the techniques conception, development and reported applications of relevance, (ii) classical and the most recent theoretical treatment of the complex behaviour manifest in the FD mass spectrum, and (iii) a thorough description of the sophisticated instrumentation and experimental procedures which were used in these studies and facilitated a renaissance in the utility of FDMS. The versatility and utility of FDMS was rigorously tested, using an intimidating array of often novel compound classes covering a wide range of molecular weights and chemical functionality. Compounds studied included; organophosphazenes, alkyphenol-formaldehyde resins, liquid crystal monomers, phthalocyanines, various aliphatic and aromatic polymers and polymer additives. Comparisons have been made throughout the studies with other ionisation techniques to establish the most appropriate ionisation method for successful structural characterisation. The ability of FDMS to yield abundant molecular weight information has been explored in depth and the concomitant advantages and disadvantages of this behaviour have been assessed in context. Where necessary complementary spectroscopic and mass spectrometric information was obtained, used to assist in structural characterisation and demonstrated the benefits of adopting a multi-technique approach. The influence of compound class upon the inherent technical features of the technique, which include: ionisation efficiency; reproducibility; ionisation mechanisms; fragmentation; sample preparation; and experimental adaptations are presented and extended to tandem mass spectrometry. Collision-induced dissociation (CID) offered the means to obtain structural detail generally precluded by the low internal energy of the so-called field desorbed ions. These investigations have established that from being considered a somewhat esoteric analytical method, FDMS is a sophisticated yet routine analytical tool when used with the power of the modern mass spectrometer. Its utility is not confined to the mass spectrometric fraternity but extends to a much wider industrial community including a variety of research chemists and affiliated spectroscopic groups.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available