TY - JOUR
T1 - Nickel(II)-Based Two-Dimensional Coordination Polymer Displaying Superior Capabilities for Selective Sensing of Cr(VI) Ions in Water
AU - Zhou, Xuan
AU - Shi, Yi Xiang
AU - Cao, Chen
AU - Ni, Chun Yan
AU - Ren, Zhi Gang
AU - Young, David James
AU - Lang, Jian Ping
PY - 2019/5/6
Y1 - 2019/5/6
N2 - 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 with ppvppa in the presence of 5-NO2-1,3-H2BDC or 2,5-H2FDC. Compound 1 has a one-dimensional (1D) double-stranded chain structure. 2 and 3 have different two-dimensional (2D) grid-like networks formed by either bridging 1D [Cd(ppvppa)2]n chains with 2,5-FDC ligands or linking 1D [Ni2(ppvppa)2]n chains with 5-NO2-1,3-BDC ligands. The ligand ppvppa and the three CPs could detect Cr2O72- and CrO42- in aqueous solutions by selective fluorescence quenching. The detection limit of the most responsive complex 3 was 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 of 3.
AB - 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 with ppvppa in the presence of 5-NO2-1,3-H2BDC or 2,5-H2FDC. Compound 1 has a one-dimensional (1D) double-stranded chain structure. 2 and 3 have different two-dimensional (2D) grid-like networks formed by either bridging 1D [Cd(ppvppa)2]n chains with 2,5-FDC ligands or linking 1D [Ni2(ppvppa)2]n chains with 5-NO2-1,3-BDC ligands. The ligand ppvppa and the three CPs could detect Cr2O72- and CrO42- in aqueous solutions by selective fluorescence quenching. The detection limit of the most responsive complex 3 was 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 of 3.
UR - http://www.scopus.com/inward/record.url?scp=85066825181&partnerID=8YFLogxK
U2 - 10.1021/acs.cgd.9b00376
DO - 10.1021/acs.cgd.9b00376
M3 - Article
AN - SCOPUS:85066825181
VL - 19
SP - 3518
EP - 3528
JO - Crystal Growth and Design
JF - Crystal Growth and Design
SN - 1528-7483
IS - 6
ER -