A spectroscopic study on the coordination and solution structures of the interaction systems between biperoxidovanadate complexes and the pyrazolylpyridine-like ligands
作者:Xian-Yong Yu、Lin Deng、Baishu Zheng、Bi-Rong Zeng、Pinggui Yi、Xin Xu
DOI:10.1039/c3dt51986d
日期:——
In order to understand the substitution effects of pyrazolylpyridine (pzpy) on the coordination reaction equilibria, the interactions between a series of pzpy-like ligands and biperoxidovanadate ([OV(O2)2(D2O)]−/[OV(O2)2(HOD)]−, abbrv. bpV) have been explored using a combination of multinuclear (1H, 13C, and 51V) magnetic resonance, heteronuclear single quantum coherence (HSQC), and variable temperature
为了理解吡唑基吡啶(pzpy)对配位反应平衡的取代作用,一系列pzpy样配体与双过氧钒酸盐([OV(O 2)2(D 2 O)] - / [OV(O 2)2(HOD)] -,abbbp。bpV)已在0.15中使用多核(1 H,13 C和51 V)磁共振,异核单量子相干(HSQC)和可变温度NMR的组合进行了研究摩尔L -1 NaCl D 2模拟生理条件的O溶液。首次报道了直接NMR数据和平衡常数。由于一些竞争性配位相互作用,形成了一系列新的七配位过氧钒酸盐[OV(O 2)2 L] -(L = pzpy样螯合配体)。根据bpV和pzpy样配体之间产物的平衡常数,发现配体的相对亲和力为pzpy> 2-Ester-pzpy≈2-Me-pzpy≈2-Amide-pzpy> 2-Et- pzpy。在bpV和pzpy之间的相互作用系统中,存在一对异构体(异构体A和BNH 4 [OV(O 2)2(pzpy)]·6H