Semirigid Tripodal Ligand Based Uranyl Coordination Polymer Isomers Featuring 2D Honeycomb Nets
Semirigid Tripodal Ligand Based Uranyl Coordination Polymer Isomers Featuring 2D Honeycomb Nets
复制标题
具有二维蜂窝网的半刚性三足配位体铀酰配位聚合物异构体
DOI：
10.1021/acs.inorgchem.8b00168
复制
发表时间：
2018
影响因子：
4.6
通讯作者：
Shi Wei-Qun
中科院分区：
文献类型：
--
作者：
Zhang Xiao-Lin;Hu Kong-Qiu;Mei Lei;Zhao Yu-Bao;Wang Yi-Tong;Chai Zhi-Fang;Shi Wei-Qun
We report five novel uranyl coordination polymers, [(CH3)2NH2]UO2(BTPCA) (1), [(CH3)2NH2]UO2(BTPCA) (2), [(CH3)2NH2]2[UO2(BTPCA)][UO2(BTPCA)]·(H2O)5.5(3), [(CH3)2NH2]2(UO2)2(BTPCA)2·(H2O)3(4), and [(CH3)2NH2]UO2(BTPCA) (5), by the utilization of semirigid ligand 1,1′,1″-(benzene-1,3,5-triyl)tripiperidine-4-carboxylic acid (H3BTPCA) and uranyl nitrate through solvothermal reactions. Single-crystal X-ray diffraction analysis reveals that the five compounds share a similar structure composition and local coordination mode to the exclusion of disordered water or DMF molecules. Each UO2(COO)3–motif is connected to six neighboring units through three BTPCA3–ligands, generating an infinite uranyl honeycomb (6, 3) net. The structures of all the five compounds consist of 2D honeycomb nets of various degrees of distortions, which are induced by the flexibility of piperidine rings. The dimethylamine cations and solvent molecules fill in the space between layers. Therefore, these five compounds are isomers in a broad sense. Notably, both compounds3and4possess 2-fold interpenetrated structures. For compound5, the distance between the neighboring 2D honeycomb nets is 7.253 Å. This is the largest distance between the 2D honeycomb nets in uranyl-based coordination polymers, to the best of our knowledge. In addition, compounds1,2, and4are also characterized by infrared spectroscopy (IR), thermogravimetric analysis (TG), powder X-ray diffraction (PXRD), and luminescence properties.
