作者:Hong-Chang Liang、Yonglian Zhang、Marcel M. Hetu
DOI:10.1016/j.inoche.2006.10.013
日期:2007.2
towards the substrate. The reactivities of 2 and 3 towards hydrolyzing BNPP are also compared with that of their Zn(II) analogues, showing that the Cu(II) complexes of the same ligand sets are more hydrolytically active than the corresponding Zn(II) complexes. Single crystal X-ray structures of 1, 2, and 3 are also reported, which show that complexes 2 and 3 form dimers with bridging alkoxide ligands
摘要 N3 供体吡啶基-胺配体、双-(2-吡啶-2-基-乙基)-胺 (L1) 和 2-[双-(2 -吡啶-2-基-乙基)-氨基]-乙醇(L2)和3-[双-(2-吡啶-2-基-乙基)-氨基]-丙-1-醇(L3),均含有醇吊坠,已被合成和结构表征。已经研究了 CuL1 (1)、CuL2 (2) 和 CuL3 (3) 促进双(对硝基苯基)磷酸酯 (BNPP) 水解的反应性,表明 3 的活性要高得多(观察到的二级速率常数) k = 6.1 × 10−1 M−1 s−1 at pH 8.4, 50 °C) 比 1 (k = 9.4 × 10−3 M−1 s−1 at pH 8.4, 50 °C) 或 3(观察秒序速率常数 k = 5.2 × 10−3 M−1 s−1 at pH 8.4, 50 °C) 以促进 BNPP 的水解。与 2 和 1 相比,3 的反应性高得多可以解释为 3 中的醇盐系链具有更高的柔韧性,这可能使