Accession Number : ADA182964

Title :   Optical Probes of Interlamellar Redox Chemistry: Intercalation of the Creutz-Taube Complex into Hydrogen Uranyl Phosphate.

Descriptive Note : Technical rept.,

Corporate Author : WISCONSIN UNIV-MADISON DEPT OF CHEMISTRY

Personal Author(s) : Verschoor,Carla M ; Ellis,Arthur B

PDF Url : ADA182964

Report Date : 08 Jul 1987

Pagination or Media Count : 15

Abstract : Hydrogen uranyl phosphate (HUP) can be intercalated by the Creutz-Taube (C-T) complex, ?Ru(NH3)52(mu-pyrazine) 5+, to yield hydrated, partially-substituted lamellar solids, H(C-T)UP, of approximate composition H(1-5x)(C-T)xUO2PO4 (0.001 x 0.01). The more crystalline samples exhibited an X ray powder pattern similar to that of HUP: the structure can be indexed in tetragonal symmetry and possesses an interlamellar spacing of approx. 8.69 A. The absorption spectrum of H(C-T)UP appears to be a simple superposition of bands due to the UO2(2+) moiety and the C-T complex. Photoluminescence (PL) of H(C-T)UP is quenched relative to HUP; PL decay curves are nonexponential and span a shorter time domain relative to HUP. Exposure of H(C-T)UP to br2 vapor causes the purple solid to become yellow. The spectral changes are consistent with redox chemistry wherein the intercalated C-T complex undergoes oxidation. For most samples examined, the PL decay times were enhanced upon oxidation. Keywords: Cruetz Taube complex; Intercalation; Hydrogen uranyl phosphate, Phosphates.

Descriptors :   CHEMISTRY, CRYSTALS, DECAY, OPTICAL EQUIPMENT, OXIDATION, OXIDATION REDUCTION REACTIONS, PATTERNS, PHOSPHATES, PHOTOLUMINESCENCE, POWDERS, PROBES, SAMPLING, SPECTRA, SYMMETRY, TIME DOMAIN, X RAYS

Subject Categories : Organic Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE