Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China.
Key Laboratory of Nuclear Medicine, Ministry of Health & Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine , Wuxi 214063, P. R. China.
ACS Appl Mater Interfaces. 2017 May 3;9(17):15164-15175. doi: 10.1021/acsami.6b11797. Epub 2017 Apr 18.
A family of thiophene-based metal-organic frameworks (MOFs), [Zn(L)(BBI)·(HO)] (1) (BBI = 1,1'-(1,4-butanediyl)bis(imidazole)) and [Cd(L)(TPOM)]·xS (2) (TPOM = tetrakis(4-pyridyloxy-methylene) methane, S represents noncoordinated solvent molecules) was constructed by employing a new linear thiophene-functionalized dicarboxylic acid (benzo-(1,2;4,5)-bis(thiophene-2'-carboxylic acid, HL) to assemble with d ions in the presence of a flexible ancillary ligand under solvothermal conditions, which exhibit diverse structures. Most strikingly, both compounds 1 and 2 could be efficient luminescent sensory materials that are highly selective and sensitive to environmental contaminants, especially for Hg(II), Cu(II), Cr(VI), and salicylaldehyde, and yet remain unaffected by other molecules that may coexit. Furthermore, this is the first report on MOF-based sensors capable of recyclable detection of Hg(II), Cr(VI), and salicylaldehyde so far. The luminescent sensing mechanism was studied in detail as well. In addition, compound 2 is one of the rare examples of high-performance MOFs trapping 2,4-dichlorophenol from the wasted methanol solution.
采用一种新的线性噻吩功能化二羧酸（苯并-（1,2；4,5）-双（噻吩-2'-羧酸），HL）与 d 离子在柔性辅助配体存在下在溶剂热条件下组装，得到了基于噻吩的金属-有机骨架（MOF）的[Zn(L)(BBI)·(HO)]（1）（BBI=1,1'-(1,4-丁二基)双(咪唑))和[Cd(L)(TPOM)]·xS（2）（TPOM=四(4-吡啶氧基亚甲基)甲烷，S 代表非配位溶剂分子）。这两种化合物都可以作为高效的发光传感材料，对环境污染物具有高度的选择性和敏感性，特别是对 Hg(II)、Cu(II)、Cr(VI)和水杨醛，而不受其他可能共存的分子的影响。此外，这是迄今为止第一个关于能够可回收检测 Hg(II)、Cr(VI)和水杨醛的基于 MOF 的传感器的报告。还详细研究了发光传感机制。此外，化合物 2 是从废甲醇溶液中捕获 2,4-二氯苯酚的高性能 MOF 的罕见例子之一。
