Hydrothermal synthesis, crystal structure and properties of a two-dimensional uranyl coordination polymer based on a flexible zwitterionic ligand.
Hydrothermal synthesis, crystal structure and properties of a two-dimensional uranyl coordination polymer based on a flexible zwitterionic ligand.
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DOI：
10.1107/s2053229618002279
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发表时间：
2018-03
期刊：
影响因子：
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通讯作者：
Wen-jie Cui;Ruyu Wang;Xi Shu;Yu Fan;Yang Liu;Yongdong Jin;Chuanqin Xia;Chao Huang
中科院分区：
文献类型：
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作者：
Wen-jie Cui;Ruyu Wang;Xi Shu;Yu Fan;Yang Liu;Yongdong Jin;Chuanqin Xia;Chao Huang
铀酰阳离子，（UO 2）2+，和有机物种之间的相互作用是感兴趣的，由于所产生的化合物的潜在应用方面的核废料处理和核燃料后处理。不同铀酰化合物与柔性两性离子1，1 ′-[1，4-亚苯基]双的水热反应（亚甲基）]二（吡啶-1-鎓-4-羧酸盐）二盐酸盐（Bpmb·2 HCl）在含H2SO 4滴液的去离子水中反应，合成了一种新型的二维铀酰配位聚合物，即聚[四氧化二[μ2- 1，1 '-][1，[4-亚苯基双（亚甲基）]双（吡啶-1-鎓-4-羧酸盐）}二-μ3-硫酸根合二铀（VI）]，[（UO_2）_2（SO_4）_2（C_20 H_16 N_2 O_4）]_n，（1）.单晶X射线衍射表明，该配位聚合物呈层状结构，（UO 2）2+中心由5个赤道O原子配位。通过红外光谱、X射线粉末衍射（PXRD）和热重分析（TGA）对其结构进行了表征。该聚合物在696 K以下具有很高的热稳定性。此外，还研究了化合物（1）的光致发光性质，发现它具有典型的铀酰荧光。
The interaction between the uranyl cation, (UO2)2+, and organic species is of interest due to the potential applications of the resulting compounds with regard to nuclear waste disposal and nuclear fuel reprocessing. The hydrothermal reaction of various uranyl compounds with flexible zwitterionic 1,1'-[1,4-phenylenebis(methylene)]bis(pyridin-1-ium-4-carboxylate) dihydrochloride (Bpmb·2HCl) in deionized water containing drops of H2SO4 resulted in the formation of a novel two-dimensional uranyl coordination polymer, namely poly[tetraoxido{μ2-1,1'-[1,4-phenylenebis(methylene)]bis(pyridin-1-ium-4-carboxylate)}di-μ3-sulfato-diuranium(VI)], [(UO2)2(SO4)2(C20H16N2O4)]n, (1). Single-crystal X-ray diffraction reveals that this coordination polymer exhibits a layered arrangement and the (UO2)2+ centre is coordinated by five equatorial O atoms. The structure was further characterized by FT-IR spectroscopy, powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA). The polymer shows high thermal stability up to 696 K. Furthermore, the photoluminescence properties of (1) has also been studied, showing it to exhibit a typical uranyl fluorescence.