Liu Jingjuan, Ji Guanfeng, Xiao Jiannan, Liu Zhiliang
College of Chemistry and Chemical Engineering, Inner Mongolia University , Hohhot 010020, People's Republic of China.
Inorg Chem. 2017 Apr 3;56(7):4197-4205. doi: 10.1021/acs.inorgchem.7b00157. Epub 2017 Mar 20.
A unique metal-organic complex (MOC) with formula [Eu(tpbpc)·CO·4HO]·DMF·solvent (Htpbpc = 4'-[4,2';6',4″]-terpyridin-4'-yl-biphenyl-4-carboxylic acid) has been successfully constructed under solvothermal conditions. The Eu complex, as proved by structural analysis, exhibits a fascinating 1D linear-type chain structure which is further extended to a 3D H-bonded supramolecular framework. The luminescent investigations confirm that the emission behavior of the Eu complex possesses excellent water stability and pH stability, and it is the first example of a MOC-based fluorescent probe with high selectivity, high sensitivity, and low detection limit, targeting Cr(III) and Cr(VI) (CrO/CrO) ions in aqueous solution. Importantly, the luminescence can be fast and simple, regenerated in detecting CrO and CrO ions. Furthermore, the simple fluorescent-based test paper was successfully prepared and provided a reliable and visual detection of Cr, CrO, and CrO ions in daily applications.
一种化学式为[Eu(tpbpc)·CO·4H₂O]·DMF·溶剂（Htpbpc = 4'-[4,2';6',4″]-三联吡啶-4'-基-联苯-4-羧酸）的独特金属有机配合物（MOC）已在溶剂热条件下成功构建。经结构分析证明，铕配合物呈现出迷人的一维线性链状结构，该结构进一步扩展为三维氢键超分子框架。发光研究证实，铕配合物的发射行为具有出色的水稳定性和pH稳定性，并且它是首个基于MOC的荧光探针实例，对水溶液中的Cr(III)和Cr(VI)（Cr₂O₇²⁻/CrO₄²⁻）离子具有高选择性、高灵敏度和低检测限。重要的是，在检测Cr₂O₇²⁻和CrO₄²⁻离子时，发光能够快速且简单地再生。此外，成功制备了基于简单荧光的测试纸，并在日常应用中对Cr³⁺、Cr₂O₇²⁻和CrO₄²⁻离子提供了可靠且直观的检测。
