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Title: Synthetic, equilibrium, kinetic and mechanistic studies of the reactions between azo dye ligands and Ni²+
Author: Blount, Jay Adam
ISNI:       0000 0004 2668 2839
Awarding Body: University of Warwick
Current Institution: University of Warwick
Date of Award: 2008
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12 azo dye ligands LI-LI2 that are used in the inkjet printer industry have been synthesised and characterised. The dyes L5B and L3765 were supplied as gifts by the chemical company Avecia. All dyes were fully examined by IH NMR, 13e NMR, IR spectroscopy, electrospray mass spectroscopy, atomic absorption spectroscopy, UV-Visible spectroscopy and microanalyses. Melting points were also determined. pKa values have been determined by visible spectroscopy for the dyes PAN(Aldrich), L7, L3765, Ll, L5 and L5B. Stability constant measurements have been attempted for the Ni(II) complexes of PAN, LI and L5 using UV-Visible spectroscopy. Single wavelength stopped-flow kinetic studies of the reactions of Ni(II) with PAN(Aldrich), PADA(Aldrich), SUDAN I(Aldrich), L3765 and L7 were carried out. Multi wavelength stopped-flow kinetic studies of the reactions of Ni(II) with L 1, L 7, L5 and L5B were examined and rate constants for complex formation (kf ) were determined. Rates of dissociation of [Ni(PAN)2] using ligand exchange with either EDTA or 2,2' :6' ,2" -Terpyridine (Terpy) were investigated using UV -Visible spectroscopy. Relative stabilities of [Ni(II)(PAN)t, [Ni(II)(L 7)] and [Ni(II)(L3765)r have been determined. Dissociation of Ni(II) complexes of Ll, L5, L5B, L6, PAN, L7 and L3765 using excess Terpy have been studied using UV -Visible spectroscopy and relative stabilities have been compared.
Supervisor: Not available Sponsor: Engineering and Physical Sciences Research Council (EPSRC) ; Avecia
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QD Chemistry