期刊
ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY
卷 78, 期 -, 页码 398-+出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S2053229622006453
关键词
coordination polymer; hexa-cadmium cluster; fluorescence recognition; crystal structure; metal cation; anion
资金
- Scientific research planning topics for the 13th Five-Year plan of Jiangsu Open University [17SSW-Z-Z-019]
- Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast University
A novel Cd-based coordination polymer was synthesized and used as a fluorescent probe for the selective recognition of Fe3+ cations and Cr2O72-/CrO42- anions through fluorescence quenching effects. The coordination polymer exhibited good stability and excellent photoluminescence properties.
The highly effective recognition and detection of metal ions and anions in water has attracted much attention with respect to environmental safety. Herein, a novel Cd-based coordination polymer, poly[[4,4'-bis(2-methylimidazol-1-yl)-biphenyl]bis(cyclohexane-1,2-dicarboxylato)dicadmium(II)], [Cd-2(C8H10O4)(2)-(C20H18N4)] n or [Cd(CHADC)(4,4'-BMIBP)(0.5)](n), (I), has been synthesized employing cis-cyclohexane-1,2-dicarboxylic acid (H(2)CHADC) and 4,4'-bis(2-methyl-1H-imidazol-1-yl)biphenyl (4,4'-BMIBP). Single-crystal X-ray analysis reveals that (I) presents a 6-connected hxl two-dimensional layer based on Cd-6(CHADC)(6) clusters with the point symbol (3(6) .4(6) .5(3)). Furthermore, (I) has been characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis and fluorescence spectroscopy, and exhibits good stability and excellent photoluminescence properties. Coordination polymer (I) was chosen as a fluorescent probe to sense different target analytes and shows an obvious selective recognition response to Fe3+ cations and Cr2O72-/CrO42- anions through luminescence-quenching effects in aqueous solution. The sensing mechanism was investigated and showed that the detection mechanism was resonance energy transfer between (I) and the Fe3+, Cr2O72- and CrO42- ions.
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