基于吡咯席夫碱的比色化学传感器用于多种金属离子的多信号检测。
Colorimetric chemosensor for multi-signaling detection of metal ions using pyrrole based Schiff bases.
机构信息
Organic and Polymer Synthesis Laboratory, Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India.
Organic and Polymer Synthesis Laboratory, Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Mar 25;122:428-35. doi: 10.1016/j.saa.2013.11.083. Epub 2013 Nov 21.
Pyrrole based Schiff bases act as a highly sensitive probe for metal ions in aqueous medium. Both receptors R1 and R2 are sensitive towards Fe(3+), Cu(2+), Hg(2+) and Cr(3+) among the other metal ions. The sensing ability of the receptors are investigated via colorimetric, optical and emission spectroscopic studies. The binding stoichiometries of R1 and R2 with metal ions have been determined as 2:1 by using Job's plot. The colorimetric receptors exhibited high sensitivity with a low detection limit of μM levels. In the presence of metal ions both receptors shows fluorescence quenching. This might be due to the photo induced electron transfer mechanism. The quenching constant was further determined using Stern-Volmer plot.
基于吡咯的席夫碱在水相中作为金属离子的高灵敏度探针。两个受体 R1 和 R2 对 Fe(3+)、Cu(2+)、Hg(2+)和 Cr(3+)等金属离子均具有敏感性。通过比色、光学和发射光谱研究来研究受体的传感能力。通过使用 Job 图确定了受体与金属离子的结合计量比为 2:1。比色受体具有高灵敏度和低检测限，可达 μM 级。在金属离子存在下，两个受体都表现出荧光猝灭。这可能是由于光诱导电子转移机制。通过 Stern-Volmer 图进一步确定了猝灭常数。
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