A Kamikaze Approach for Capturing Hg<sup>2+</sup> Ions through the Formation of a One-Dimensional Metal–Organometallic Polymer
作者:Sk. Atiur Rahaman、Biswajit Roy、Soumik Mandal、Subhajit Bandyopadhyay
DOI:10.1021/acs.inorgchem.5b02104
日期:2016.2.1
Efficient uptake of Hg2+ ions in mercury-resistant bacteria is attributed to the presence of cysteine thiolates in the Mer proteins. In this work, a pyridine-appended pyridine-fused imidazolyl-2-thione scaffold was used as a mimic for the cysteinyl residues for efficient binding of the Hg2+ ions. In the presence of Hg2+ ions, an aryl C–H bond of the ligand is activated. The sulfur and nitrogen donors on the
耐汞细菌中Hg 2+离子的有效吸收归因于Mer蛋白中硫代半胱氨酸的存在。在这项工作中,使用吡啶附加的吡啶融合的咪唑基-2-硫酮骨架作为半胱氨酸残基的模拟物,以有效结合Hg 2+离子。在存在Hg 2+离子的情况下,配体的芳基CH键被激活。配体另一端的硫和氮供体与第二个Hg 2+离子配位。在乙酸根离子存在的情况下,该基序形成一维聚合物晶体网络,其特征为单晶X射线衍射研究。这种聚合物结构的形成导致Hg 2+的有效去除(〜99%) 通过一种未开发的“ kamikaze”方法从水溶液中分离离子,该方法涉及使用小分子配体作为捕获离子的牺牲剂。