title: A cagelike polyanion with a Ag+ enwrapped, [AgAs2Mo15O54]11-.
abstract: The polyanion [AgAs(2)Mo(15)O(54)](11-) has an unusual cage-like structure composed of [AsMo(6)O(27)](15-) and [AsMo(6)O(24)](9-) subunits connected by three MoO(4) tetrahedra, and a Ag(+) cation is inclosed at the center of the cage and coordinated by two As atoms with a As-Ag-As bond angle of 180° along with three μ(3)-oxo groups from MoO(4) tetrahedra to lead to a trigonal-pyramidal coordination geometry. The compound was also characterized by IR, X-ray photoelectron spectroscopy, fluorescent spectroscopy, and thermogravimetry-differential scanning calorimetry. The stability of [AgAs(2)Mo(15)O(54)](11-) in aqueous solution was investigated by using electronic absorbance spectroscopy and electrospray ionization mass spectrometry.
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Department of Chemistry, Northwest University, Xi'an 710069, China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Zhang
authors.forename: Lili
authors.initials: L
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Sun
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Huaiming
authors.initials: H
authors.lastname: Hu
authors.forename: Ganglin
authors.initials: G
authors.lastname: Xue
mesh_terms: D000838:Anions / Q000737:chemistry; D001151:Arsenic / Q000737:chemistry*; D008958:Models, Molecular; D008982:Molybdenum / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*
chemical_list: D000838:Anions; D011108:Polymers; D012834:Silver; D008982:Molybdenum; D001151:Arsenic; D010100:Oxygen