一种基于含冠醚稠合二硫醇盐配体的铂（II）配合物的新型光学/电化学钠离子传感器。

A new optical/electrochemical Na+ sensor based on platinum(II) complexes containing crown ether annelated dithiolate ligands.

作者信息

Ji Yong, Zhang Rui, Du Xiao-Bo, Zuo Jing-Lin, You Xiao-Zeng

机构信息

Coordination Chemistry Institute and the State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, 210093, P. R. China.

出版信息

Dalton Trans. 2008 May 21(19):2578-82. doi: 10.1039/b719997j. Epub 2008 Mar 25.

DOI:10.1039/b719997j

PMID:18443700

Abstract

Two new platinum(II) complexes containing both 4,4'-di-tert-butyl-2,2'-bipyridine (dbbpy) and crown ether annelated dithiolate ligands, [Pt(dbbpy)(3O-C2S4)] (, 3O-C2S4(2-)=1,4,7-trioxa-10,13-dithiacyclopentadec-11-ene-11,12-dithiolate) and [Pt(dbbpy)(4O-C2S4)] (, 4O-C2S(4)2-=1,4,7,10-tetraoxa-13,16-dithiacyclooctadec-14-ene-14,15-dithiolate), have been prepared and characterized. These two complexes show intense electronic absorption bands in the UV-vis region due to the intramolecular mixed metal/ligand-to-ligand charge transfer transition, and they display solvatochromic behavior. The redox properties of these compounds have been investigated by cyclic voltammetry and complex shows a significant response for Na+ ions with a large positive shift of ca. 125 mV. Moreover, complex is very sensitive in detecting Na+ cations with an obvious change in color which can be conveniently observed with the naked eye.

摘要

两种新型的铂（II）配合物已被制备并表征，它们同时含有4,4'-二叔丁基-2,2'-联吡啶（dbbpy）和冠醚稠合二硫醇盐配体，分别为[Pt(dbbpy)(3O-C2S4)]（3O-C2S4(2-)=1,4,7-三氧杂-10,13-二硫杂环十五-11-烯-11,12-二硫醇盐）和[Pt(dbbpy)(4O-C2S4)]（4O-C2S(4)2-=1,4,7,10-四氧杂-13,16-二硫杂环十八-14-烯-14,15-二硫醇盐）。由于分子内混合金属/配体到配体的电荷转移跃迁，这两种配合物在紫外可见区域显示出强烈的电子吸收带，并且表现出溶剂化变色行为。通过循环伏安法研究了这些化合物的氧化还原性质，配合物对Na+离子有显著响应，正向位移约125 mV。此外，配合物在检测Na+阳离子时非常灵敏，颜色有明显变化，肉眼可方便地观察到。