A novel uranyl complex UO2(tci)(C3H5N2)·H2O: Synthesis, crystal structure and characterization

A new uranyl(VI) complex of rigid V-shaped carboxylate ligand: Synthesis, structure and properties

“…The uranyl unit is nearly a straight line with the O6-U1-O5 angle of 179.5(3)°. The remaining oxygen atoms are in the equatorial plane with the U-O distances ranged from 2.300(5) Å to 2.447(5) Å, which are comparable to those values found in other reported pentagonal bipyramidal structures [15,16].…”

“…The uranyl unit is nearly a straight line with the O6-U1-O5 angle of 179.5(3)°. The remaining oxygen atoms are in the equatorial plane with the U-O distances ranged from 2.300(5) Å to 2.447(5) Å, which are comparable to those values found in other reported pentagonal bipyramidal structures [15,16].As shown in Fig. 2, L 2− act as bidentate bridging ligands to connect uranium ions into one-dimensional (1D) chain which contains 8-membered rings and 32-membered rings ranged alternatively with the U· · ·U distances of 5.512(1) Å and 15.977(3) Å, respectively.…”

Uranyl−Organic Assemblies with Acetate-Bearing Phenyl- and Cyclohexyl-Based Ligands

“…Several such examples have recently been described, which include the uranyl complexes with tris(2-carboxyethyl)isocyanurate, 13 and with the acetate-bearing ligands 2-pyridylacetate, 14 1,4,7,10-tetraazacyclododecane-N,N 0 ,N 00 ,N 000 -tetraacetate (DOTA), 15 1,4,8,11-tetraazacyclotetradecane-1,4,8,11-tetraacetate (TETA), 16 and 1,3,5-benzenetriacetate. 17 In all these molecules, a rigid or at least conformationally constrained planar platform is functionalized by one, three, or four alkylcarboxylate groups which introduce a degree of geometric freedom, thus enabling novel uranyl-organic architectures to be obtained.…”

Counterion-Controlled Formation of Layered Honeycomb and Polythreading Uranyl Networks and the Highly Sensitive and Selective Detection of Fe3+ in Aqueous Media

“…As far as we know, only two uranium complexes and one thorium complex have been crystallographically characterized in our previous work. 38,39 Recently, more studies are focusing on the exploration of the influence of additional 3d metal ions and N-donating chelation, which either demonstrated coordinated 40−44 or acted as a neutral guest 45−48 or played as a counterion. 12 In order to completely survey the structure-directed role of additional 3d metal ions and N-donors with the frameworks of H 3 t c i , w e h a v e d e m o n s t r a t e d s i x c o m p l e x e s , [(UO 2 ) 2 (tci (5), and [UO 2 (tci)] − • (C 10 H 9 N 2 ) + •H 2 O (6), which were characterized by the crystal structures, IR, TG, and photoluminescent spectroscopy.…”

“…Therefore, H 3 tci has been widely used in constructing transition/lanthanide metal organic complexes, − which is not commonly found for actinides. As far as we know, only two uranium complexes and one thorium complex have been crystallographically characterized in our previous work. , Recently, more studies are focusing on the exploration of the influence of additional 3d metal ions and N-donating chelation, which either demonstrated coordinated − or acted as a neutral guest − or played as a counterion. ,− …”