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Formation of uranyl phthalate coordination polymers with unusual 2D net topologies in the presence of organic cations
CrystEngComm ( IF 3.1 ) Pub Date : 2020-10-27 , DOI: 10.1039/d0ce01323d
Grigory Andreev 1, 2, 3 , Nina Budantseva 1, 2, 3 , Anastasiya Levtsova 1, 2, 3 , Marina Sokolova 1, 2, 3 , Aleksander Fedoseev 1, 2, 3
Affiliation  

New uranyl coordination polymers have been synthesized in the presence of organic cations using phthalic acid as a linker. X-ray analysis of single crystals has shown that compounds with protonated imidazole, and 2-methylimidazole exhibit 2D layered structures. The complex (HIm)2[(UO2)3{C6H4(COO)2}4]·2H2O contains two crystallographically unique uranium atoms in penta- and hexagonal bipyramidal environments. As a result of the bridging function of the phthalate ions, infinite layers were formed. The stacking of the layers results in the formation of square channels which were filled with HIm cations. In the structure of (HMeIm)4[(UO2)7{C6H4(COO)2}8(OH)2], four crystallographically unique uranium atoms were found both in the 6- and 7-fold coordination environments. Both phthalate- and hydroxyl-ions act as bridging ligands resulting in the 2D structure. Organic cations are located between the layers. Both layered complexes exhibit unusual net topologies. In addition, a series of tetranuclear complexes were obtained that are described by the formula A4[(UO2)43-O)2{C6H4(COO)2}4]·nH2O (where A = t-BuNH3, C2H5NH3, As(C6H5)4). All complexes are characterized by IR, UV-vis, and luminescence spectroscopy. Thermal analysis of the compounds was conducted.

中文翻译:

在有机阳离子存在下形成具有异常二维净拓扑结构的邻苯二甲酸铀酰配位聚合物

使用邻苯二甲酸作为连接基,在有机阳离子存在下合成了新的铀酰配位聚合物。对单晶的X射线分析表明,具有质子化的咪唑和2-甲基咪唑的化合物表现出二维层状结构。络合物(HIm)2 [(UO 23 {C 6 H 4(COO)2 } 4 ]·2H 2 O在五和六边形双锥体环境中包含两个晶体学上唯一的铀原子。由于邻苯二甲酸酯离子的桥接功能,形成了无限的层。层的堆叠导致形成填充有HIm阳离子的方形通道。在(HMeIm)的结构中4 [(UO 2 7 {C 6 H 4(COO) 2 } 8(OH) 2 ],在6倍和7倍配位环境中都发现了四个晶体学独特的铀原子。邻苯二甲酸盐离子和羟基离子均充当桥接配体,从而形成2D结构。有机阳离子位于层之间。这两个分层的复合体都具有不同寻常的网络拓扑。此外,获得了一系列的四核配合物由下式A中所述4 - [(UO 2 4(μ 3 -O) 2 {C 6 H ^ 4(COO) 2} 4]· n H 2 O(其中A =t- BuNH 3,C 2 H 5 NH 3,As(C 6 H 54)。所有复合物的特征在于红外光谱,紫外可见光谱和发光光谱。对化合物进行热分析。
更新日期:2020-11-19
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