Kinetic Study of the Hydrolysis of BNPP by the Cerium(III) Complex |
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| Authors: | Chun Huang Shulan Cai Like Zou Jianshen Feng Jiaqing Xie |
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| Affiliation: | 1. College of Materials and Chemical Engineering, Sichuan University of Science &2. Engineering , Zigong , P. R. China;3. Institute of Functional Materials, Sichuan University of Science &4. Engineering , Zigong , P. R. China;5. University Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education , Zigong , Sichuan , P. R. China |
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| Abstract: | ![]()
5,5,7,12,12,14-Hexamethyl-1,4,8,11-tetraazacyclotetradecane (L) was synthesized and characterized. The kinetics of hydrolysis of bis(p-nitrophenyl)phosphate (BNPP) in the catalytic system containing macrocyclic ligand and cerium(III) was investigated. This catalytic system show high catalytic activity and better reproducibility and stability than other similar systems in the range of pH of around 5.6–7.2. The stoichiometry and spectral analysis showed that the real active species is the macrocyclic complex of cerium(III). Based on the analytical results of the specific absorption spectra, an intramolecular nucleophilic substitution mechanism for the catalytic hydrolysis of BNPP is proposed, a correlative kinetic mathematical model is established, and the corresponding thermodynamic and kinetic constants are calculated. |
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| Keywords: | Cerium(III) hydrolysis kinetics macrocyclic ligand phosphate ester |
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