| 2,5-噻吩二甲酸与菲咯啉构筑的稀土配合物:晶体结构,荧光性质和对Cu2+离子的荧光传感 | |
| Lanthanide Complexes with 2,5-Thiophenedicarboxylate and 1,10-Phenanthroline: Crystal Structures,Fluorescence Properties and Luminescence Sensing for Cu2+Ion | |
| 摘要: 稀土硝酸盐和2，5-噻吩二甲酸与菲咯啉在水热反应条件下合成了3个新的配合物，[Ln（2，5-tdc）1.5（phen）（H2O）]n（Ln=Gd（1），Tb（2），Dy（3）；2，5-tdc=2，5-噻吩二甲酸根，phen=菲咯啉）。通过X射线单晶衍射确定了它们的晶体结构。配合物1~3为同构的2D网络结构。配合物1在340 nm激发下出现最大发射中心位于366和387 nm的宽峰，可归属于配体的π*-π跃迁发射。配合物2在365 nm紫外灯照射下发绿光，其荧光发射光谱中出现了4个尖峰，位于491、545、588和620 nm处，对应于Tb3+的5D4→7FJ（J=6~3）跃迁。配合物2的荧光寿命显示为单指数衰减，其值为（0.123±0.005） ms。配合物3的发射光谱中出现了2个尖峰，位于482和575 nm处，分别对应于Dy3+的4F5/2→6H15/2和4F5/2→6H13/2跃迁。另外，研究了配合物2的荧光传感能力，该配合物可作为荧光探针检测水溶液中的Cu2+离子。 | |
| 关键词: 稀土配合物 荧光 Cu2+离子 | |
| 基金项目: 国家自然科学基金（No.21471104）和首都师范大学实验室开放基金资助项目。 | |
| Abstract: 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 1~3 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 π*-π transition within the ligands. Complex 2 displays green emission and shows four emission peaks at 491, 545, 588 and 620 nm, corresponding to 5D4→7FJ (J=6~3) transitions of Tb3+ under the excitation of 310 nm. The 5D4 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 4F5/2→6H15/2 and 4F5/2→6H13/2 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. | |
| Keywords: lanthanide complex fluorescence Cu2+ ion | |
| 投稿时间：2016-06-22 修订日期：2016-08-08 | |
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| 樊婷婷,屈相龙,李佳佳,董高云,李睿,巩佳利,李夏.2,5-噻吩二甲酸与菲咯啉构筑的稀土配合物:晶体结构,荧光性质和对Cu2+离子的荧光传感[J].无机化学学报,2016,32(11):1911-1918. | |
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