TY - JOUR
T1 - Metallomicellar catalysis
T2 - Hydrolysis of phosphodiester with Cu(II) and Zn(II) complexes in micellar solution
AU - Du, Juan
AU - Chen, Minzhu
AU - Wu, Yurong
AU - Zeng, Xiancheng
AU - Liu, Yingjin
AU - Shunzo, Yamamoto
AU - Yoshimi, Sueishi
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (grant no. 20173038).
PY - 2003/9
Y1 - 2003/9
N2 - The effects of two metal complexes of 2,2′-dipyridylamine (bpya) ligand, [(bpya)Cu]Cl2 and [(bpya)Zn]Cl2, in promoting the hydrolysis of bis(4-nitrophenyl) phosphate (BNPP) have been kinetically investigated in Brij35 micellar solution and at 298 K, pH ranging from 6.41 to 8.6. In neutral micellar solution at 298 K, pH 7.02, the rate constants for the catalytic hydrolysis of BNPP by [(bpya Cu]Cl2 and [(bpya)Zn]Cl2 are 1.2 × 106 times and 1.5 × 105 times higher than those for the spontaneous hydrolysis, respectively. Kinetic studies show that the active species in the catalytic hydrolysis of BNPP is the aquo-hydroxy form, and the relative kinetic and thermodynamic parameters indicate that the mechanism of the reaction involves intramolecular nucleophilic attack on the metal center-bound diester.
AB - The effects of two metal complexes of 2,2′-dipyridylamine (bpya) ligand, [(bpya)Cu]Cl2 and [(bpya)Zn]Cl2, in promoting the hydrolysis of bis(4-nitrophenyl) phosphate (BNPP) have been kinetically investigated in Brij35 micellar solution and at 298 K, pH ranging from 6.41 to 8.6. In neutral micellar solution at 298 K, pH 7.02, the rate constants for the catalytic hydrolysis of BNPP by [(bpya Cu]Cl2 and [(bpya)Zn]Cl2 are 1.2 × 106 times and 1.5 × 105 times higher than those for the spontaneous hydrolysis, respectively. Kinetic studies show that the active species in the catalytic hydrolysis of BNPP is the aquo-hydroxy form, and the relative kinetic and thermodynamic parameters indicate that the mechanism of the reaction involves intramolecular nucleophilic attack on the metal center-bound diester.
KW - Brij35 micellar solution
KW - Hydrolysis of bis(4-nitrophenyl) phosphate
KW - Intramolecule nucleophilic attack
KW - Metal complexes
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U2 - 10.1081/DIS-120023813
DO - 10.1081/DIS-120023813
M3 - Article
AN - SCOPUS:0142137744
SN - 0193-2691
VL - 24
SP - 683
EP - 689
JO - Journal of Dispersion Science and Technology
JF - Journal of Dispersion Science and Technology
IS - 5
ER -