No abstract

No abstract

Under hydrothermal conditions, six uranium coordination polymers were obtained by employing the ligand of tris(2carboxyethyl) isocyanurate (H 3 tci) and different combinations of dblock metal ions (Mn 2+ , Co 2+ , Zn 2+ , Ni 2+ ) or N-donors (triethylamine (Et 3 N), 2,2′-bipyridine (2,2′-bipy)). Three uranium polymers 3) containing transition metal hydrated ions, crystallized as two-dimensional coordination polymers with the common (6, 3) net topology. X-ray crystal structures of 1−3 display that they have similar honeycomb-like frameworks with all ligands bis-chelating. 5) are made up of four interlocked sets and exhibit the 4-fold-interpenetrated frameworks. [UO 2 (tci)] − •(C 10 H 9 N 2 ) + •H 2 O (6) comprises the 2,2′-bipy cation as counterion and represents a 2D grid layered structure. Additional metals and the N-donors are all free in the complexes, acting as the templates and compensation of the charge equilibrium. The solid-state emission spectra indicate that all of the synthesized compounds own fluorescence emissions. Furthermore, the results of the quenching ability of Fe 3+ for complexes 5 and 6 exhibit their highly sensitive and selective detection for Fe 3+ ions. Moreover, the uranium complexes can be used as a potential probe for Fe 3+ in aqueous solutions.