Solvothermal Synthesis and Conformation Probe of Novel Europium Complex of Brønsted Acidic Ionic Liquid: 1,3‐ Bis (1‐carboxylatoethyl)imidazolium Bromide
Solvothermal Synthesis and Conformation Probe of Novel Europium Complex of Brønsted Acidic Ionic Liquid: 1,3‐ Bis (1‐carboxylatoethyl)imidazolium Bromide
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DOI：
10.1002/zaac.202100058
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发表时间：
2021-06
期刊：
影响因子：
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通讯作者：
Huimin Sun;Mengchen Liu;Xiaofang Fu;Tingting Xin;Yibo Wang;Siao-Shan Wang;Jing Wang;Yanyan Diao;Feifei Yang;Tingting Zhang
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文献类型：
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作者：
Huimin Sun;Mengchen Liu;Xiaofang Fu;Tingting Xin;Yibo Wang;Siao-Shan Wang;Jing Wang;Yanyan Diao;Feifei Yang;Tingting Zhang
用溶剂热法合成了1，3-二(1-羧乙基)咪唑溴化物[Eu2(C9N2O4H11)3(OH)2]BrH2O([H2bcei]BrC9N2O4H11=bCeI2 ⋅ )的新型铕配合物[Eu2(C9N2O4H11)3(OH)2]BrH2O。[Eu2(C9N2O4H11)3(OH)2]Br ⋅ H2O具有由Eu−O配位键构成的三维结构。在这个配合物中，Eu3+周围有两个配位环境，Eu1和Eu2分别是八配位和七配位的化学球。H2O分子、BR-−离子和带正电荷的3D骨架之间的氢键和静电相互作用提高了它的热稳定性。在2 90 °C以上，[Eu2(C9N2O4H11)3(OH)2]Br2 ⋅ H2O的3D骨架开始分解。测定了该配合物的高分辨发射光谱，与X射线晶体结构分析的结果一致，其发光寿命为0.937 ms。
A novel europium complex [Eu2(C9N2O4H11)3(OH)2]Br ⋅ H2O derived from 1,3‐bis(1‐carboxylatoethyl)imidazolium bromide ([H2bcei]Br, C9N2O4H11=bcei2−) was synthesized by solvothermal method. [Eu2(C9N2O4H11)3(OH)2]Br ⋅ H2O possesses 3D structure constructed by Eu−O coordination bonds. In this complex, there are two coordinated environments around Eu3+, and Eu1 and Eu2 are eight‐ and seven‐ coordinated chemical sphere, respectively. The hydrogen bonds and electrostatic interactions between H2O molecules, Br−ions and the 3D framework with positive charges enhance its thermostability. So above the temperature of 290 °C, the 3D framework of [Eu2(C9N2O4H11)3(OH)2]Br ⋅ H2O begins to decompose. The high‐resolution emission spectrum of the complex had been measured, which is consistent with the results of the X‐ray crystal structure analysis, and luminescence lifetime for the complex is 0.937 ms.