title: Copper(I) and copper(II) uranyl heterometallic hybrid materials.
abstract: Two copper-uranium heterometallic compounds, [(UO2)3Cu(II)O2(C6NO2)5] (1) and [(UO2)Cu(I)(C6NO2)3] (2), have been synthesized by the reaction of uranyl acetate with copper salts in the presence of isonicotinic acid. Both compounds have been characterized by single-crystal X-ray diffraction, IR, Raman, and UV-vis spectroscopy. In compound 1, interactions between copper and uranium centers occur and result in a three-dimensional pillar layered structure. Compound 1 is also the first example of a heterometallic uranyl organic framework with a trinuclear U3O18 building block. Compound 2 is the first uranyl organic framework that contains monovalent copper, which arises from the reaction of Cu(II) chloride and is assumed to be due to the oxidation of chloride at low pH.
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: Zhehui
authors.initials: Z
authors.lastname: Weng
authors.forename: Zhi-hui
authors.initials: ZH
authors.lastname: Zhang
authors.forename: Travis
authors.initials: T
authors.lastname: Olds
authors.forename: Marcin
authors.initials: M
authors.lastname: Sterniczuk
authors.forename: Peter C
authors.initials: PC
authors.lastname: Burns