The development of FT-Raman techniques to quantify the hydrolysis of Cobalt (III) nitrophenylphosphate complexes using multivariate data analysis
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Authors
Tshabalala, Oupa Samuel
Issue Date
2007-03
Type
Dissertation
Language
en
Keywords
FT-Raman , Kinetic modelling , Partial least squares , Multivariate data analysis , Sucrose hydrolysis , P-nitrophenylphosphate , P-nitrophenol , Cobalt(III) complex , Organophosphate ester hydrolysis , Pseudo-first order rate constant and second order rate constant
Alternative Title
Abstract
The FT-Raman techniques were developed to quantify reactions that
follow on mixing aqueous solutions of bis-(1,3-diaminopropane)diaquacobalt(
III) ion ([Co(tn)2(0H)(H20)]2+) and p-nitrophenylphosphate
(PNPP).
For the development and validation of the kinetic modelling
technique, the well-studied inversion of sucrose was utilized. Rate
constants and concentrations could be estimated using calibration
solutions and modelling methods. It was found that the results
obtained are comparable to literature values. Hence this technique
could be further used for the [Co(tn)2(0H)(H20)]2+ assisted
hydrolysis of PNPP.
It was found that rate constants where the pH is maintained at 7.30
give results which differ from those where the pH is started at 7.30
and allowed to change during the reaction. The average rate
constant for 2:1 ([Co(tn)2(0H)(H20)]2+:PNPP reactions was found to
be approximately 3 x 104 times the unassisted PNPP hydrolysis rate.
Description
Citation
Tshabalala, Oupa Samuel (2007) The development of FT-Raman techniques to quantify the hydrolysis of Cobalt (III) nitrophenylphosphate complexes using multivariate data analysis, University of South Africa, Pretoria, <http://hdl.handle.net/10500/23202>