Ionothermal effects on low-dimensionality uranyl compounds using task specific ionic liquids

Abstract

Task specific ionic liquids are employed in the development of two new low-dimensionality uranyl compounds.

Ni(2,2′:6′,2″-Terpyridine-4′-carboxylate)2 Zwitterions and Carboxylate Polyanions in Mixed-Ligand Uranyl Ion Complexes with a Wide Range of Topologies

“…Restraints on several bond lengths and displacement parameters had to be applied. Checkcif suggests the possible space group Pca21, but, in addition to the large Rint value in the orthorhombic system, no satisfying refinement could be obtained in this space group, and the structure was refined as a 2component inversion twin in space group Pc, with a Flack parameter 0.422 (13). are in the usual slightly distorted octahedral environment which will not be further described.…”

“…U 4 Ni 2 rings are found in the diperiodic polymer formed in [(UO 2 ) 4 (t-R-1,2-chdc) 4 Ni 2 (tpyc) 4 ] ( 12), where t-R-1,2-chdc 2− is trans-R,R-1,2-cyclohexanedicarboxylate, the heavily puckered sheets being interlocked. 1,3-Phenylenediacetate (1,3pda 2− ) gives a very thick diperiodic polymer with KIa topology, [(UO 2 ) 4 (1,3-pda) 4 Ni 2 (tpyc) 4 ]•CH 3 CN•2H 2 O (13). A triperiodic framework is formed with nitrilotriacetate (nta 3− ) in [(UO 2 ) 2 (nta) 2 Ni 2 (tpyc) 2 ] (14), where Ni II is found in Ni(tpyc) 2 units as well as in Ni(nta) 2 4− moieties which both act as 4-coordinated nodes.…”

Effect of Ionothermal Conditions on the Crystallization of Organically Templated Uranyl Sulfate Compounds

“…Given the nature of ionic liquids, which are defined as materials composed of ionic species that are fluid below 100 °C, they have the potential to act as both a solvent and a templating agent through their organic-based cations . However, to date ionothermal synthesis methods have been applied to produce only relatively few uranyl compounds. − The specific roles of each reagent and heat treatment strategy relative to the final product in these syntheses have not been rigorously explored.…”

Ligand Mediated Morphology of the Two‐Dimensional Uranyl Aqua Sulfates [UO2(X)(SO4)(H2O)] [X = Cl– or (CH3)3NCH2COO]

“…Less is known about their interaction in more complex systems featuring these environmentally relevant oxoanions and competing terminal ligands. Few examples are known within the literature for similar complexes, making this an underexplored area of uranyl coordination chemistry , , , …”