摘要
本文通过引入小分子竞争配体,利用高温水热法成功合成了两种新的硫酸根介导的葫芦脲铀酰配合物(UO_2)_2(CB5)(SO_4)_2(H_2O)_2·5H_2O (U-CB5-SO_4)和(UO_2)(CB6)_(0.5)(SO_4)(H_2O)·4H_2O (U-CB6-SO_4).通过单晶X射线衍射、粉末衍射(PXRD)、热重分析(TGA)、傅里叶变换红外光谱(FTIR)和荧光光谱(FL)对配合物进行表征,解析了配合物的结构并研究了它们的理学性质. U-CB5-SO_4属于正交晶系,空间群为Pnma, U-CB6-SO_4属于单斜晶系,空间群为I2/m. U-CB5-SO_4晶体在a轴上是折线形的走向,晶体为黄色风车形多棱柱多晶,而U-CB6-SO_4晶体在a轴上是直线形,晶体为较长的黄色棒状单晶.本文提出了一种"竞争配体"用于介导复杂体系配位合成的新思路,同时丰富和发展了铀酰-葫芦脲-硫酸三元体系的配位化学相关研究.
In this article, with the aid of additional ligands,(UO_2)_2(CB5)(SO_4)_2(H_2O)_2·5H_2O(U-CB5-SO_4) and(UO_2)-(CB6)_(0.5)(SO_4)(H_2O)·4H_2O(U-CB6-SO_4) were synthesized by hydrothermal method at high temperature. Their structures and physico-chemical properties were characterized by a combination of single-crystal X-ray diffraction,PXRD, TG-DSC, FTIR, UV-Vis and fluorescence spectra. U-CB5-SO_4 crystalized in orthorhombic system, and space group Pnma, while U-CB6-SO_4 crystalized in monoclinic system and space group I2/m. U-CB5-SO_4 forms a yellow windmill-like poly crystal, while U-CB6-SO_4 forms a yellow stick-like single crystal.
引文
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