Nickel(II)-Based Two-Dimensional Coordination Polymer Displaying Superior Capabilities for Selective Sensing of Cr(VI) Ions in Water
Nickel(II)-Based Two-Dimensional Coordination Polymer Displaying Superior Capabilities for Selective Sensing of Cr(VI) Ions in Water
复制标题
镍(II)基二维配位聚合物在选择性传感水中Cr(VI)离子方面表现出优异的能力
DOI：
10.1021/acs.cgd.9b00376
复制
发表时间：
2019
影响因子：
3.8
通讯作者：
Jian-Ping Lang
中科院分区：
文献类型：
--
作者：
Xuan Zhou;Yi-Xiang Shi;Chen Cao;Chun-Yan Ni;Zhi-Gang Ren;David James Young;Jian-Ping Lang
Three fluorescent coordination polymers (CPs) including [Zn(ppvppa)(5-NO2-1,3-BDC)(H2O)] (1), [Cd(ppvppa)2(2,5-FDC)]·1.5H2O (2), and [Ni(ppvppa)(5-NO2-1,3-BDC)(H2O)]·0.5MeCN (3) (ppvppa= dipyridin-2-yl-[4-(2-pyridin-4-yl-vinyl)-phenyl]-amine; 5-NO2-1,3-H2BDC = 5-nitroisophthalic acid and 2,5-H2FDC = 2,5-furandicarboxylic acid) were assembled from solvothermal reactions of Zn(NO3)2·6H2O, Cd(NO3)2·4H2O, or Ni(NO3)2·6H2O withppvppain the presence of 5-NO2-1,3-H2BDC or 2,5-H2FDC. Compound1has a one-dimensional (1D) double-stranded chain structure.2and3have different two-dimensional (2D) grid-like networks formed by either bridging 1D [Cd(ppvppa)2]nchains with 2,5-FDC ligands or linking 1D [Ni2(ppvppa)2]nchains with 5-NO2-1,3-BDC ligands. The ligandppvppaand the three CPs could detect Cr2O72–and CrO42–in aqueous solutions by selective fluorescence quenching. The detection limit of the most responsive complex3was 1.39 ppb for Cr2O72–(pH = 4) or 0.09 ppb for CrO42–(pH = 12), which are below the allowable limits set by the United States Environmental Protection Agency and European Union and the lowest among the known CPs-based sensors. The mechanism of such an emission quenching process may be ascribed to the overlap between the absorption band of the analyte and those of the excitation and emission bands of3.
