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Zhang J, Tang Y, Li JZ. Kinetic studies of manganese(III) and cobalt(II) Schiff base complexes as synthetic hydrolases for p-nitrophenyl picolinate in CTAB surfactant micellar solution. PROGRESS IN REACTION KINETICS AND MECHANISM 2013. [DOI: 10.3184/146867813x13632857557699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Four symmetrical bis-Schiff bases with either benzo-10-aza-crown ether or morpholino pendants and their Mn(III) and Co(II) complexes have been employed as models for hydrolase enzymes by studying the kinetics of their hydrolysis reactions with p-nitrophenyl picolinate (PNPP) in buffered CTAB micellar solution. A kinetic model of PNPP cleavage catalysed by these complexes is proposed. The effects of complex structures and reaction temperature on the rate of PNPP hydrolysis have been examined. All four complexes exhibit higher catalytic activity in the buffered CTAB micellar solution and the rate increases with pH of the buffer at 25 °C. The complexes containing two crown ether group exhibit higher catalytic activities than their crown-free analogues, and the catalytic activity of the phenyl-bridged Schiff base complex is larger than that of the ethyl-bridged Schiff base complex for the same substituents and metal. The catalytic activity of the manganese(III) complex exceeds that of the cobalt(II) complex in catalysing hydrolysis of PNPP under the same ligand.
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Affiliation(s)
- Jin Zhang
- College of Materials and Chemical Engineering, Chongqing University of Arts and Science, Yongchuan, Chongqing, 402160, P. R. China
| | - Ying Tang
- College of Materials and Chemical Engineering, Chongqing University of Arts and Science, Yongchuan, Chongqing, 402160, P. R. China
| | - Jian-Zhang Li
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, School of Chemistry and Pharmaceutical Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, 643000, P. R. China
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Li JZ, Wang T, Hu W, Zhang J, Qin SY. Studies on p-Nitrophenyl Picolinate Cleavage by Unsymmetrical Bis-Schiff Base Manganese(III) and Cobalt(II) Complexes in CTAB Surfactant Micellar Solution. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2012.681983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Li JZ, Feng FM, Zhang J, Qin SY. Hydrolysis Kinetics ofp-Nitrophenyl Picolinate Catalyzed by Mono-Schiff Base Complexes with Aza-Crown Ether or Morpholino Pendants in CTAB Surfactant Micellar Solution. J DISPER SCI TECHNOL 2010. [DOI: 10.1080/01932690903543337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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