Symmetry versus Minimal Pentagonal Adjacencies in Uranium‐Based Polyoxometalate Fullerene Topologies

Abstract

C U soon: Clusters containing 60, 44, and 36 uranyl peroxide hydroxide polyhedra (see picture) adopt fullerene topologies of maximum symmetry. The largest of these, denoted U60, is topologically identical to C(60) with no pentagonal adjacencies and the highest possible symmetry. U44 adopts the topology with maximum symmetry rather than that with the lowest number of pentagonal adjacencies.

Giant regular polyhedra from calixarene carboxylates and uranyl

“…To the best of our knowledge, fullerene type, polyhedral cages have been described by Burns et al 39. from uranyl peroxide components4041, without organic moieties involved in the cage framework. However, use of bowl-shaped calixarene carboxylic acids allows assembly into defined and unique globular assemblies, built up from organic ligands and uranyl, in which the uranyl groups are centred in the faces of regular polyhedra.…”

Alteration of dehydrated schoepite and soddyite to studtite, [(UO2)(O2)(H2O)2](H2O)2

“…Each uranyl hexagonal bipyramid in the structure contains two peroxide groups that form equatorial edges of the bipyramid, and adjacent bipyramids form a chain by sharing peroxide edges. Following our report of these new linkages of polyhedra in studtite (Burns and Hughes 2003), we have created a family of nano-structured uranyl peroxide clusters with similar linkages between uranyl polyhedra (Burns et al 2005;Forbes et al 2008;Sigmon et al 2009). …”

A new sandwich-type polyoxometalate constructed from penta-lacunary [HPW7O28]8− units and MnIII ion

“…Although this class of inorganic compounds has been known for more than a hundred years, a great number of novel polyoxoanions with unexpected shapes, sizes and properties are still being discovered [6][7][8][9][10][11][12][13][14][15][16][17][18]. In this aspect, transition-metal-substituted polyoxometalate (TMSP) is one of the most important species owing to their variety of building blocks, adjustable connection modes and tunable transition-metals ions that being accommodated [19][20][21][22][23][24][25][26].…”