| 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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