Facile, divergent route to bis-Zn(II)dipicolylamine type chemosensors for pyrophosphate
摘要:
A new, two-step synthesis has been developed for a series of bis-DPA-type ligands whose dinuclear Zn(II) complexes function as fluorescent anion sensors. The Zn(II) complexes exhibit good selectivity for PPi over other anions in aqueous medium (pH 7.5) and may be used to monitor the extent of enzyme-catalysed reactions, in which PPi is produced or consumed. (C) 2012 Elsevier Ltd. All rights reserved.
Effect of bridging anions on the structure and stability of phenoxide bridged zinc dipicolylamine coordination complexes
作者:Edward J. O'Neil、Hua Jiang、Bradley D. Smith
DOI:10.1080/10610278.2013.776170
日期:2013.6.1
Zn2+ coordinationcomplexes studied by spectroscopic methods. X-ray crystal diffraction analysis of a dinuclear zinc complex with two bridging acetate anions showed a ternary structure with highly charged interior and lipophilic exterior, which helps explain why this class of water-soluble complexes can effectively diffuse through cell membranes. The stability of the dinuclear zinc complexes in aqueous
制备了一系列在邻位具有 2,2'-二吡啶甲胺取代基的四种相关苯酚衍生物,并通过光谱方法研究了它们的 Zn2+ 配位配合物。具有两个桥接乙酸根阴离子的双核锌配合物的 X 射线晶体衍射分析显示出内部带高电荷和亲脂外部的三元结构,这有助于解释为什么这类水溶性配合物可以有效地通过细胞膜扩散。发现双核锌配合物在水溶液中的稳定性强烈依赖于阴离子;也就是说,桥接氧阴离子,如乙酸盐和焦磷酸盐,将两个 Zn2+ 阳离子锁定到周围的配体上,大大增强了配体/锌的亲和力。总体,