一种新催化体系的构建及其催化活性研究  

Construction and catalytic activity of a new catalytic system

作　　者：王敏[1] 蒋炳英[1] 尚宏利[1] 桑雪梅[1] 谢家庆[1] 

机构地区：[1]重庆理工大学化学化工学院,重庆400054

出　　处：《化学工程》2013年第4期57-61,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21173274)

摘　　要：用一种配体(5,5,7,12,12,14-六甲基-1,4,8,11-四氮杂环十四烷-N'-乙酸)和镧离子(Ⅲ)构建了一种新的催化体系,并用于催化对硝基苯酚磷酸二酯(BNPP)水解裂解。利用紫外-可见分光光度法研究了BNPP的催化水解的动力学。实验结果表明:这种新催化体系与其他相似的镧离子体系相比表现出更高的活性、水溶性和稳定性,在这一体系作用下,BNPP催化水解的速率比其自水解的速率提高了107倍左右。光谱分析表明,催化体系的活性物种是由镧离子和配体构成的大环配合物。A new catalytic system containing a ligand （ 5,5,7,12, 12, 14-hexamethyl-1,4,8,11- tetraazacyclo- tetradecane-N＇-acetic acid） and lanthanum （ Ⅲ ） was constructed and used as the catalyst of the hydrolysis of bis （4-nitrophenyl） phosphate ester （BNPP）. The kinetics of BNPP catalytic hydrolysis was investigated by UV-VIS method. The results indicate that this catalytic system shows greater catalytic activity, better water-solubility and stability than other similar lanthanum （Ⅲ） systems. The catalytic rate of the BNPP hydrolysis is about 10^7-fold faster than that of its spontaneous hydrolysis under the same conditions. The spectral analysis shows that the real active species is the macrocyclic complex of La（Ⅲ） in BNPP catalytic hydrolysis.

关 键 词：新催化体系 构建 催化活性 BNPP水解 

分 类 号：O643.32[理学—物理化学]