带羧基支链的四氮杂环铈配合物催化磷酸酯水解的研究  

Phosphodiester Hydrolysis Catalysed by a Cerium Complex of Nitrogen Large Ring with Carboxyl Branch

作　　者：蔡述兰[1] 冯发美[1] 何锡阳[1] 张秀兰[1] 谢家庆[1] 任德虎[1] 

机构地区：[1]四川理工学院化学与制药工程学院,四川自贡643000

出　　处：《中国稀土学报》2012年第6期661-665,共5页Journal of the Chinese Society of Rare Earths

基　　金：绿色催化四川省高校重点实验室项目(2011LYJ1104);四川理工学院大学生创新基金项目(cx20121303)资助

摘　　要：合成和表征了一种大环配体5,5,7,12,12,14-六甲基-1,4,8,11-四氮杂环十四烷-N/-乙酸(L),研究了金属铈离子和配体组成的体系催化对硝基苯酚磷酸二酯(BNPP)水解的动力学。结果表明:该体系在催化对硝基苯酚磷酸二酯(BNPP)水解方面表现出高的催化活性和稳定性,以及好的水溶性。通过对特征光谱和化学计算的分析表明,催化活性物种是金属铈和配体组成的配合物。基于光谱分析的结果,提出了BNPP催化水解的机理及得到研究结果的证明。A macrocyclic compound 5,5,7,12,12, 14-hexamethyl-1,4 , 8, 11-tetraazacyclotetradecane- N/-acetic acid （L） was synthesized and character- ized. The kinetics of hydrolysis of bis （p-nitrophenyl） phosphate （BNPP） in the catalytic system containing macrocyclic ligand and Ce（III） was investigated. This catalytic system showed high catalytic activity in the hydrolysis of his （p-nitrophenyl） phosphate （BNPP） and better water-solubility and stability than other sim- ilar systems. The stoichiometry and spectral analysis showed that the real active species was the macrocyclic complex of Ce （III）. Based on the analytical results of the specific absorption spectra, an intramolecular nu- cleophilic substitution mechanism for the catalytic hy- drolysis of BNPP was proposed, the validity of the mechanism was confirmed by the results of this study.

关 键 词：大环铈配合物 支链 催化 水解 稀土 

分 类 号：O643.3[理学—物理化学]