title: Hybrid uranium-transition-metal oxide cage clusters.
abstract: Transition-metal based polyoxometalate clusters have been known for decades, whereas those built from uranyl peroxide polyhedra have more recently emerged as a family of complex clusters. Here we report the synthesis and structures of six nanoscale uranyl peroxide cage clusters that contain either tungstate or molybdate polyhedra as part of the cage, as well as phosphate tetrahedra. These transition-metal-uranium hybrid clusters exhibit unique polyhedral connectivities and topologies that include 6-, 7-, 8-, 10-, and 12-membered rings of uranyl polyhedra and uranyl ions coordinated by bidentate peroxide in both trans and cis configurations. The transition-metal polyhedra appear to stabilize unusual units built of uranyl polyhedra, rather than templating their formation.
authors.affiliation: Department of Civil and Environmental Engineering and Earth Sciences, and ‡Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States.
authors.forename: Jie
authors.initials: J
authors.lastname: Ling
authors.forename: Franklin
authors.initials: F
authors.lastname: Hobbs
authors.forename: Steven
authors.initials: S
authors.lastname: Prendergast
authors.forename: Pius O
authors.initials: PO
authors.lastname: Adelani
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Babo
authors.forename: Jie
authors.initials: J
authors.lastname: Qiu
authors.forename: Zhehui
authors.initials: Z
authors.lastname: Weng
authors.forename: Peter C
authors.initials: PC
authors.lastname: Burns