Heterodinuclear Zn(II)−Fe(III) and Homodinuclear M(II)−M(II) [M = Zn and Ni] complexes of a Bicompartmental [N 6 O] ligand as synthetic mimics of the hydrolase family of enzymes
作者:Chandni Pathak、Dharmendra Kumar、Manoj Kumar Gangwar、Darshan Mhatre、Thierry Roisnel、Prasenjit Ghosh
DOI:10.1016/j.jinorgbio.2018.04.018
日期:2018.8
spectrophotometric titration and the mass spectrometry studies, a monoaquated and dihydroxo species 2C, 3C and 4C has been identified as the catalytically active species responsible for the phosphodiester hydrolysis of the bis(2,4 - dinitrophenyl)phosphate (2,4 - BDNPP) substrate in the pH range 5.5-10.5. The kinetic studies further revealed that the homodinuclear [Ni(II)-Ni(II)] complexes (4) (kcat = 1.26 × 10-2 s-1)
含桥联苯氧基的双室配体的异核混合价[Zn(II)-Fe(III)]和同核[Zn(II)-Zn(II)]和[Ni(II)-Ni(II)]配合物作为N-供体的O-供体和四个吡啶基部分和两个胺基部分具有类似于酶水解酶家族的磷酸酯水解活性。异双核[Zn(II)-Fe(III)](2)络合物是通过将Fe(NO3)3∙9H2O和Zn(OAc)2∙2H2O依次添加到配体2,6‑bis [双(2-吡啶基甲基)氨基]甲基} -4-叔丁基苯酚(HL)(1),中等产率的[Zn(II)-Zn(II)](3)和[Ni(II) )-Ni(II)](4)的络合物是通过配体(1)分别与Zn(OAc)2∙2H2O和Ni(OAc)2∙2H2O直接反应而获得的,中等至中等收率(43-63) %)。根据分光光度滴定法和质谱研究,单水和二羟基物质2C,3C和4C被确定为负责双(2,4-二硝基苯基)磷酸酯(2,4- BDNPP)底物的pH范围为5