| In this paper,two novel amide-functionalized bridged ligands[N,N′-bis（4-methylenepyridin-4-yl）-1,4-benzene dicarboxamide（L1）and N,N′-bis（4-methylenepyridin-4-yl）-1,4-naphthalene dicarboxamide（L2）]as N-containing ligands,different organic carboxylic acids[2,2’-dithiodibenzoic acid（H2DTSA）,1,3-phenylenediaceticacid（H2PDA）,2,5-thiophenedicarboxylic acid（H2TPD）,1,3-benzenedicarboxylic acid（1,3-H2BDC）,5-methylisophthalic acid（H2MIP）,5-hydroxyisophthalic acid（H2HIPA）,3,5-dinitrobenzoic acid（HDNBA）,1,4-cyclohexanedicarboxylic acid（1,4-H2CHDA）and pyromellitic acid（H4PMA）]as auxiliary ligands,self-assembled with different metal ions under hydrothermal conditions.Seventeen coordination polymers{[Zn（L1）0.5（DTSA）]·H2O（1）,[Cd（L1）0.5（DTSA）（H2O）]（2）,[Mn（L1）0.5（DTSA）（H2O）]（3）,[Co（L1）0.5（DTSA）（H2O）]（4）,[Ni（L1）0.5（DTSA）（H2O）]（5）,[Pb2（L1）0.5（DTSA）2]（6）,[Co2（L2）2（PDA）2]·H2O（7）,[Co（L2）（TPD）（H2O）2]·8H2O（8）,[Co（L2）（1,3-BDC）]·2H2O（9）,[Co（L2）（MIP）]·H2O（10）,[Co3（L2）3（HIPA）3]（11）,[Cd（L2）（DNBA）2]（12）,[Cd2（L2）2（BDC）2（H2O）2]·2H2O（13）,[Cd（L2）（1,4-CHDA）]（14）,[Cd（L2）（HIPA）（H2O）]·H2O（15）,[Cd（L2）（MIP）]·H2O（16）and[Cd（L2）（PMA）0.5（H2O）]·H2O（17）}were successfully obtained.The coordination polymers were characterized by single crystal X-ray diffraction,infrared spectroscopy,thermogravimetry and X-ray powder diffraction,and the fluorescent sensing properties of coordination polymers were systematically studied.The results of fluorescent sensing experiments show that 1,2 and 6 are effective fluorescent sensing materials for detecting Fe3+ions（1 and 6）,dimethyl sulfoxide（DMSO）（1 and2）and N,N′-dimethylformamide（DMF）（2）;7-11 shows a multi-functional fluorescence response to metal ion(Fe3+),anions(CrO42–,Cr2O72–and MnO4–)and biological protein（bovine serum albumin:BSA）;12-17 show fluorescent sensing behaviors for heavy metal ion(Fe3+),anions(CrO42–,Cr2O72–and MnO4–),biomolecules L-aspartic（Asp）and BSA.This paper synthesized a series of new multi-functional fluorescent sensing materials for the detection of these analytes,with ideal fluorescence quenching efficiency and KSVV value,good selectivity and sensitivity,excellent cycling and stability,and lower limit of detection. |
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