期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 258, 期 -, 页码 86-92出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2017.10.004
关键词
Coordination polymer; Europium; Fluorescence; Sensor
资金
- National Natural Science Foundation of China [21361017]
- Inner Mongolia Natural Science Foundation [2016MS0203]
A europium coordination polymer constructed by the 4'-(4-carboxyphenyl)- 2,2':6',2 ''-terpyridine ligand (HL), namely, [EuL(CH3COO)Cl](n) (1), has been prepared by the solvothermal method. Compound 1 was structurally characterized by the elemental analysis, FT-IR, powder X-ray diffractions (PXRD), thermogravimetric (TG) analysis, and single-crystal X-ray diffraction. Complex 1 displays a novel linear chain structure, which further extends to the 3D supramolecular structure via pi...pi and hydrogen bonds interactions. The luminescent properties of 1 were investigated in detail, which exhibit the fluorescent sensing for detecting Fe3+, CrO42-, and Cr2O72- ions in aqueous solution, respectively. In addition, 1 shows high sensitive and selective sensing for CrO42- and Cr2O72- anions with the great quenching efficiency. Furthermore, the luminescent sensing mechanisms of differentiating analytes are explored in detail. It is worth noting that there exists the weak interaction between Fe3+ ions and carboxylate oxygen atoms of CH3COO- groups through XPS characterization, resulting in the high quenching effect of 1.
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