Synthesis, crystal structure, photoluminescence property and photoelectronic behavior of two uranyl-organic frameworks constructed from 1, 2, 4, 5-benzenetetracarboxylic acid as ligand

•Uranyl complexes constructed by 1, 2, 4, 5-benzenetetracarboxylic acid.•Disscussing the surface photovoltage spertra.•Disscussing the photocatalytic property and the impact factors of the property.

By using 1, 2, 4, 5-benzenetetracarboxylic acid as organic ligands, two uranyl coordination complexes, (UO2)2(bta)(DMA)2 (1) and [(UO2)2(bta)(μ3-OH2)]·2[HN(CH3)2]·H2O (2) (H4bta = 1, 2, 4, 5-benzenetetracarboxylic acid, DMA = N,N-Dimethylacetamide) were synthesized. The X-ray single crystal analysis revealed that complex 1 exhibits a 3-demensional framework, while complex 2 exhibits a 2-demensional framework. In order to furthermore characterize the two complexes and extend their functional properties, spectroscopies of IR, UV–vis, photoluminescence and surface photovoltage were also studied primarily. In addition, thermogravimetric analyses and photocatalytic studies for complexes 1 and 2 were discussed in detail.

Graphical abstractTwo coordination polymers, (UO2)2(bta)(DMA)2 (1) and [(UO2)2(bta)(μ3-OH2)]·2[HN(CH3)2]·H2O (2) (H4bta = 1,2,4,5-benzenetetracarboxylic acid, DMA = N,N-Dimethylacetamide) have been firstly synthesized. Complexes 1 and 2 are both crystallizing in monoclinic, space group P21/c. The phtoelectronic property of the two complexes had been studied in detail.Figure optionsDownload full-size imageDownload as PowerPoint slide