Solvothermal synthesis of uranium(VI) phases with aromatic carboxylate ligands: A dinuclear complex with 4-hydroxybenzoic acid and a 3D framework with terephthalic acid
Solvothermal synthesis of uranium(VI) phases with aromatic carboxylate ligands: A dinuclear complex with 4-hydroxybenzoic acid and a 3D framework with terephthalic acid
复制标题
DOI：
10.1016/j.jssc.2015.11.031
复制
发表时间：
2016-02
影响因子：
3.3
通讯作者：
Yingjie Zhang;I. Karatchevtseva;M. Bhadbhade;T. T. Tran-T.;I. Aharonovich;Daniel J. Fanna;N. D. Shepherd;K. Lu;Feng Li;G. Lumpkin
中科院分区：
文献类型：
--
作者：
Yingjie Zhang;I. Karatchevtseva;M. Bhadbhade;T. T. Tran-T.;I. Aharonovich;Daniel J. Fanna;N. D. Shepherd;K. Lu;Feng Li;G. Lumpkin
With the coordination of dimethylformamide (DMF), two new uranium(VI) complexes with either 4-hydroxybenzoic acid (H2phb) or terephthalic acid (H2tph) have been synthesized under solvothermal conditions and structurally characterized. [(UO2)2(Hphb)2(phb)(DMF)(H2O)3]·4H2O (1) has a dinuclear structure constructed with both pentagonal and hexagonal bipyramidal uranium polyhedra linked through a µ2-bridging ligand via both chelating carboxylate arm and alcohol oxygen bonding, first observation of such a coordination mode of 4-hydroxybenzoate for 5fions. [(UO2)(tph)(DMF)] (2) has a three-dimensional (3D) framework built with pentagonal bipyramidal uranium polyhedra linked with µ4-terephthalate ligands. The 3D channeled structure is facilitated by the unique carboxylate bonding with nearly linear C–O–U angles and the coordination of DMF molecules. The presence of phb ligands in different coordination modes, uranyl ions in diverse environments and DMF in complex1, and tph ligand, DMF and uranyl ion in complex2has been confirmed by Raman spectroscopy. In addition, their thermal stability and photoluminescence properties have been investigated.
