title: Microporous crystal 12CaO x 7Al(2)O(3) encaging abundant O(-) radicals.
abstract: Extremely high concentrations (>1020 cm-3) of active oxygenic radicals, O- and O2-, have been created in the zeolitic crystal, 12CaO.7Al2O3 (C12A7), which can accommodate anions in its cavities. An increase in oxygen pressure and a decrease in water vapor pressure at high temperature enhance the formation of the radicals. The oxidation of Pt is observed on the surface of the material as a result of reaction with the active oxygens.
authors.affiliation: Hosono Transparent Electroactive Materials Project, ERATO, Japan Science and Technology Corporation, KSP C-1232, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan.
authors.forename: Katsuro
authors.initials: K
authors.lastname: Hayashi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Hirano
authors.forename: Satoru
authors.initials: S
authors.lastname: Matsuishi
authors.forename: Hideo
authors.initials: H
authors.lastname: Hosono
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry; D004578:Electron Spin Resonance Spectroscopy; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry*; D017382:Reactive Oxygen Species / Q000737:chemistry*; D013818:Thermogravimetry
chemical_list: D017610:Calcium Compounds; D010087:Oxides; D017382:Reactive Oxygen Species; C016538:lime; D000537:Aluminum Oxide