发光
镧系元素
热重分析
猝灭(荧光)
光致发光
材料科学
配位复合体
配位聚合物
结晶学
齿合度
红外光谱学
晶体结构
聚合物
化学
离子
有机化学
荧光
光学
金属
物理
光电子学
冶金
复合材料
作者
Shuai Ji,Dong Sik Yu,Puyan Hao,Mengzhen Jia,Rui Zhu,Yiming Zhang,Xiaoqi Zhao,Lei Zhao
标识
DOI:10.1016/j.omx.2023.100266
摘要
Luminescent thermal quenching is a very troublesome thing for the practical application of luminescent materials, but also is a very common phenomenon. In theory, artificially reducing the number of quenching group around the luminescent lanthanide ion can effectively enhance the luminescence of lanthanide luminescent materials. In this paper, {[Eu2(NBA)6(H2O)4]∙H2O}n [Eu-NBA, NBA = p-nitrobenzoic acid] coordination polymers containing abundant coordination and interstitial water molecules were synthesized via hydrothermal methods. The chemical composition, crystal structures, and thermal stability of Eu-NBA coordination polymers were systemically investigated by Frontier-transfer infrared (FTIR) spectra, single-crystal X-ray diffraction and thermogravimetric analysis. X-ray diffraction analysis results revealed that Eu-NBA coordination polymers were crystallized into one-dimensional (1D) chain structures, where the adjacent Eu3+ ions were linked together by bidentate and/or tetradentate bridging carboxylate groups of the NBA ligands. The temperature-dependent photoluminescence spectra revealed that the shape and intensity of the luminescence spectra strongly depended on the coordination environment around Eu3+, and significant luminescent thermal enhancement was observed. These experimental results provided useful theoretical support for further understanding of the luminescence enhancement mechanism of lanthanide coordination polymers.
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