Synthesis and Structure of an Organo-templated Oxouranium Phosphite

A novel layered oxouranium phosphite open-structure[(C10H24N2)(H2O)][(UO2)2(HPO3)3](denoted as TJPU-8,TJPU=Tianjin Polytechnic University) was hydrothermally synthesized with isophorondiamine(IPDA) as the template.Single crystal structure refinement disclosed that TJPU-8 crystallized in the monoclinic space group P21c with cell parameters a=1.8346(9) nm,b=0.6734(1) nm,c=2.0639(0) nm,β=114.61(5)°,V=2.3182(8) nm3,Z=2.TJPU-8 was constructed by UO7 monomer,U2O12 dimer and HPO3 groups.The monomeric UO7 or dimeric U2O12 was connected by HPO3 groups to form two types of 4-ring chains.An undulating sheet was then generated by connecting these two types of chains via HPO3 bridges.The layer structure formed by stacking the sheets along the a direction via the strong H-bonds of organoamine cations and water molecules intercalated in the interlayer spaces with the framework oxygen atoms.Although a mixture ofcis- and trans-IPDA was used,only cis-IPDA served as the template.A typical green light emission of TJPU-8 is observed when excited by 266 am laser.