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Uranyl Phosphonates with Multiple Uranyl Coordination Geometries and Low Temperature Phase Transition
Chinese Journal of Chemistry ( IF 5.5 ) Pub Date : 2020-10-16 , DOI: 10.1002/cjoc.202000510
Lanhua Chen 1 , Yugang Zhang 1 , Zhehui Weng 2 , Zhiyong Liu 1 , Jiarong Zhang 1 , Yaxing Wang 1 , Shuao Wang 1
Affiliation  

Two new uranium(VI) phosphonate compounds, namely K8[N(C2H5)4]2(UO2)17(H2O)4[CH2(PO3)2]8[CH2(PO3)(PO3H)]4‧16(H2O) (1) and [N(C2H5)4]4(H3O)2(UO2)10[CH2(PO3)2]5[CH2(PO3)(PO3H)]2‧10H2O (2), have been synthesized under mild hydro/solvothermal condition. The structural analysis of the two compounds reveals that they both contain all three typical coordination geometries of the U(VI) ions, including UO6 tetragonal, UO7 pentagonal, and UO8 hexagonal bipyramids. Moreover, compound 1 displays a temperature‐induced single crystal to single crystal phase transformation as confirmed by the Single‐crystal X‐ray diffraction data collected at different temperatures. Temperature‐dependent fluorescence spectra presented herein illustrate the perturbation of the electronic structure of uranyl centers.image

中文翻译:

具有多种铀酰基配位几何构型和低温相变的铀酰膦酸酯

两个新的铀(VI)膦酸酯化合物,即K 8 [N(C 2 H 54 ] 2(UO 217(H 2 O)4 [CH 2(PO 32 ] 8 [CH 2(PO 3)(PO 3 H)] 4 ‧16(H 2 O)(1)和[N(C 2 H ^ 54 ] 4(H 3 O)2(UO 210 [CH 2(PO 32 ] 5 [CH 2(PO 3)(PO 3 H)] 2 ‧10H 2 O(2)中,已在温和加氢合成/溶剂热条件。对这两种化合物的结构分析表明,它们都包含U(VI)离子的所有三种典型配位几何,包括UO 6四边形,UO 7五边形和UO 8六角双锥。此外,化合物1显示出温度诱导的单晶至单晶相变,这是由在不同温度下收集的单晶X射线衍射数据所证实的。本文呈现的取决于温度的荧光光谱说明了铀酰中心电子结构的扰动。图像
更新日期:2020-10-16
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