Two 2D multiresponsive luminescence coordination polymers for selective sensing of Fe3+, CrVI anions and TNP in aqueous medium

被引:48
作者
Zhou, Ai-Mei [1 ]
Wei, Han [1 ]
Gao, Wei [1 ]
Liu, Jie-Ping [1 ]
Zhang, Xiu-Mei [1 ]
机构
[1] Huaibei Normal Univ, Coll Chem & Mat Sci, Huaibei 235000, Anhui, Peoples R China
关键词
METAL-ORGANIC FRAMEWORKS; HIGHLY SENSITIVE DETECTION; 2,4,6-TRINITROPHENOL TNP; CHEMICAL SENSORS; SMALL MOLECULES; PHASE DETECTION; DONOR LIGANDS; FLUORESCENT; IONS; PROBE;
D O I
10.1039/c9ce01045a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Two luminescence coordination polymers (CPs) formulated as {[Zn(L)(H2O)(2)]center dot H2O}(n) (1) and {[Cd(L)(H2O)(2)]center dot 4H(2)O}(n) (2) are successfully prepared by solvothermal reactions between the corresponding metal(ii) ions and 5-(4-pyridylamino)isophthalic acid (H2L). Crystallographic studies reveal that 1 and 2 exhibit similar 2D honeycomb layer networks, but have different numbers of lattice water molecules. The layers are connected through hydrogen bonds to give 3D supramolecular frameworks. CPs 1 and 2 possess coordinated water molecules and uncoordinated oxygen atoms as well as electron-rich amide groups, which are easy to recognize diverse analytes. Moreover, they show considerable stability in aqueous systems with a broad pH range from 3 to 12. Luminescence sensing experiments indicate that they can be regarded as highly sensitive sensors for detecting Fe3+ ions, Cr-VI anions (CrO42- and Cr2O72-) and 2,4,6-trinitrophenol (TNP) through luminescence quenching. In addition, the mechanisms for the luminescence response of CPs 1 and 2 towards Fe3+ ions, Cr-VI anions and TNP have been investigated in detail. Besides, CPs 1 and 2 represent two very good examples of versatile Zn/Cd-CP probes capable of sensing Fe3+ ions, Cr-VI anions and TNP.
引用
收藏
页码:5185 / 5194
页数:10
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