Abstract
When exposed to water, the two-dimensional uranyl–organic layeredcompound [(CH3)2NH2][(UO2)(BCPBA)]·2DMF·H2O (H3BCPBA = 3,5-bis(40-carboxylphenoxy) benzoic acid) gradually undergoes a completesingle-crystal-to-single-crystal phase transition to [(CH3)2NH2]-[(UO2)(BCPBA)]·3.4H2O, resulting in an enhanced ligand–ligandinteraction between the adjacent layers. This process gives rise toinitial quenching of the uranyl photoluminescence followed bysubsequent recovery of the photoluminescence with a muchelevated intensity, as a unique case of aggregation-induced emissionin an extended solid system, further confirmed by DFT ****ysison bonding.