New La(III) Complex Immobilized on 3-Aminopropyl-Functionalized Silica as an Efficient and Reusable Catalyst for Hydrolysis of Phosphate Ester Bonds
作者:Alfredo A. Muxel、Ademir Neves、Maryene A. Camargo、Adailton J. Bortoluzzi、Bruno Szpoganicz、Eduardo E. Castellano、Nathalia Castilho、Tiago Bortolotto、Hernán Terenzi
DOI:10.1021/ic402705r
日期:2014.3.17
is the synthesis, structure, and monoesterase and diesterase activities of a new mononuclear [LaIII(L1)(NO3)2] (1) complex (H2L1 = 2-bis[(2-pyridylmethyl)-aminomethyl}-6-[N-(2-pyridylmethyl) aminomethyl)])-4-methyl-6-formylphenol) in the hydrolysis of 2,4-bis(dinitrophenyl)phosphate (2,4-BDNPP). When covalently linked to 3-aminopropyl-functionalized silica, 1 undergoes disproportionation to form a
本文描述了新的单核[La III(L 1)(NO 3)2 ](1)配合物(H 2 L 1 = 2-双[((2-吡啶基甲基))-氨基甲基} -6- [ N-(2-吡啶基甲基)氨基甲基)]-4-甲基-6-甲酰基苯酚)水解2,4-双(二硝基苯基)磷酸酯(2,4-BDNPP)。当共价连接到3-氨丙基官能化的二氧化硅上时,1发生歧化反应形成双核物种(APS-1),由于第二配位球效应增加了底物至复杂的缔合常数,因此与均相反应相比,其催化效率有所提高。可以将锚定的催化剂APS-1回收并重新用于后续的水解反应(五次),而活性只会略有下降。在存在DNA的情况下,我们建议1也可以转化为双核活性物质(如APS-1所观察到的),并且两者均显示出对DNA裂解的有效作用。