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Title: Probing the nano-structure of ionic liquids using the nuclear overhauser effect
Author: Puttick, Simon
ISNI:       0000 0004 2746 9335
Awarding Body: University of Leeds
Current Institution: University of Leeds
Date of Award: 2012
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A methodology utilising the distance dependence of the rotating frame Overhauser effect (ROE) has been developed to investigate the existence of nano-structured domains in ionic liquids. A partition coefficient termed the domain preference integral ratio (DPIR) has been created to offer a simple perspective by which the preferential solubility of probe molecules in ionic liquids can be assessed. A model system, consisting of the first five oligomers of methyl methacrylate (MMA) has been designed to investigate the source of an 'ionic liquid effect' observed in the free radical polymerisation (FRP) of MMA conducted in ionic liquids. Investigation by rotating frame Overhauser effect spectroscopy (ROESY) and calculation of the DPIR has been used to probe the solvation environment of the model system. Furthermore, calculation of the DPIR for the reversible addition fragmentation chain transfer (RAFT) control agent cyanobenzoyl dithiobenzoate (CB DB) has led to a series of predictions of the outcome of the RAFT controlled FRP of MMA in ionic liquids. The reaction kinetics of the RAFT controlled reactions have been monitored to investigate the success of the methodology to predict the outcome of a reaction based upon the observed solvation environment of one of the reactant molecules.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available