Lanthanide Complexes with 2, 5-Thiophenedicarboxylate and 1,10-Phenanthroline:Crystal Structures, Fluorescence Properties and Luminescence Sensing for Cu2+ Ion

作者：Fan Ting-Ting; Qu Xiang-Long; Li Jia-Jia; Dong Gao-Yun; Li Rui; Gong Jia-Li; Li Xia^*

来源：Chinese Journal of Inorganic Chemistry, 2016, 32(11): 1911-1918.

DOI：10.11862/CJIC.2016.221

• lanthanide complex
• fluorescence
• Cu2+ ion

Three lanthanide-organic frameworks [Ln(2,5-tdc)(1.5)(phen)(H2O)](n) (Ln=Gd (1), Tb (2), Dy (3); 2,5-tdc= 2,5-thiophenedicarboxylate and phen =1,10-phenanthroline) have been synthesized and characterized by X-ray single-crystal diffraction. Complexes 1 similar to 3 feature isostructural 2D structures. The luminescence properties of 1-3 were investigated. Under the excitation of 340 nm, the emission spectrum of complex 1 shows a broad band centre at 366 and 387 nm, which plausibly arises from ligand-centered IT*-7T transition within the ligands. Complex 2 displays green emission and shows four emission peaks at 491, 545, 588 and 620 nm, corresponding to D-5(4) -> F-7(J) (J=6-3) transitions of Tb3+ under the excitation of 310 nm. The D-5(4) emission decay curve reveals a monoexponential behavior with the lifetime value of (0.123 +/- 0.005) ms. The emission spectrum of complex 3 records two peaks of 482 and 575 nm, corresponding to the F-4(5/2) -> H-6(15/2) and F-4(5/2) -> H-6(13/2) transition of Dy3+, respectively, under the excitation of 330 nm. Moreover, the fluorescence sensing ability of complex 2 was investigated, revealing that it can be used as a fluorescence probe to detect Cu2+ in aqueous solution. CCDC: 1036885, 1; 1036884, 2; 1036886, 3.

• 出版日期2016-11-10
• 单位首都师范大学