Syntheses and photoluminescent properties of two uranyl-containing compounds with extended structures

Two new uranyl-organic compounds [(UO2)3O(OH)3(NA)2]− · H3O+ (1) (HNA = nicotinic acid) and (UO2)2(phen)2(BTEC) (2) (H4BTEC = 1,2,4,5-benzenetetracarboxylic acid, phen = 1,10-phenanthroline) have been prepared under hydrothermal conditions. X-ray single-crystal structure analyses reveal that compound 1 consists of infinite helical polyoxouranium ribbons built up from trinuclear [(UO2)3O(OH)3]+ units and NA ligands, whereas compound 2 is composed of two-dimensional sheets joined together through π–π interactions. Both compounds show intense emission under excitation of UV light.

Graphical abstractTwo new uranyl-containing compounds were synthesized hydrothermally and they exhibited intense yellow light under the excitation of UV rays. The structures of the two compounds were analyzed by single-crystal X-ray diffraction.Figure optionsDownload full-size imageDownload as PowerPoint slide