基于2,4,5,6-四氟间苯二甲酸构筑的稀土有机框架发光材料的合成及性质研究  

Synthesis and Properties of Luminescent Rare Earth-Organic Frameworks That Based on 2,4,5,6-Tetrafluoro-Phthalic Acid

作　　者：李玲[1] 蒋叶飞 丁立稳[1] 曾承辉[1] LI Ling;JIANG Yefei;DING Liwen;ZENG Chenghui(Jiangxi Normal University,Nanchang 330022,China)

机构地区：[1]江西师范大学,江西南昌330022

出　　处：《材料研究与应用》2022年第1期81-86,共6页Materials Research and Application

基　　金：国家自然科学基金项目(51962008);江西省自然科学基金项目(20202BABL203018)。

摘　　要：稀土由于具有f电子,因此稀土-有机框架发光材料具有多样结构和独特的4f电子跃迁发光性质,被广大研究者们青睐.在绿色、环保、温和的水热条件下,选用Eu^(3+)作为中心离子,通过引入配体四氟间苯二甲酸和辅助配体1,10-菲咯啉,合成了分子式为[Eu_(2)(TFBA)_(6)(phen)_(2)(H_(2)O)_(2)]_(n)(1-Eu,其中TFBA为脱质子的四氟间苯二甲酸,phen为1,10-菲咯啉)的稀土-有机框架材料.同时,利用X射线粉末衍射法(PXRD)、热重分析法(TGA)、傅里叶红外光谱法(FT-IR)等测试方法对1-Eu进行了详细的表征,确定了其准确结构和稳定性能,深入分析了其激发和发射光谱、荧光衰减寿命及荧光量子产率.实验结果表明:1-Eu是一个二维结构的稀土-有机框架材料,其荧光衰减寿命为0.652 ms,具有55.28%的高荧光量子产率(QY);除此之外,1-Eu还具有良好的耐水稳定性、热稳定性及耐酸碱性质.Rare earth-organic framework luminescent materials are favored by researchers due to their diverse structures,unique 4 f electron transition,and excellent luminescence properties. Under environmental friendly and mild hydrothermal conditions,this work selects Eu^(3+)as the central ion,a new LnMOFs with the molecular formula of[Eu_(2)(TFBA)_(6)(phen)_(2)(H_(2)O)_(2)]_(n)(1-Eu,TFBA=2,4,5,6-tetrafluoro-phthalic,phen=110-phenanthroline) rare earth organic framework materials was synthesized. Meanwhile, X-ray powder diffraction(PXRD),thermogravimetric analysis(TGA),Fourier transform infrared spectroscopy(FT-IR)were used to characterize 1-Eu in detail. The exact structure and stability of 1-Eu were determined,and the excitation and emission spectra,fluorescence decay lifetime and fluorescence quantum yield were further analyzed. The experimental results show that 1-Eu is a two-dimensional rare-earth organic framework material with a fluorescence decay life of 0. 652 ms and a high fluorescence quantum yield(QY)of 55. 28%.In addition,1-Eu shows excellent water resistance,thermal stability,acid and alkali resistance properties.

关 键 词：稀土-有机框架材料 镧系金属配合物 四氟间苯二甲酸 1 10-菲咯啉 荧光 

分 类 号：O614.33[理学—无机化学]