Optical probes of interlamellar redox chemistry: intercalation of the Creutz-Taube complex into hydrogen uranyl phosphate. Technical report

Technical Report · Wed Jul 08 04:00:00 EDT 1987

OSTI ID:6091575

Verschoor, C M; Ellis, A B

Hydrogen uranyl phosphate (HUP) can be intercalated by the Creutz-Taube (C-T) complex, Ru(NH/sub 3/)52(mu-pyrazine) 5/sup +/, to yield hydrated, partially-substituted lamellar solids, H(C-T)UP, of approximate composition H(1-5x)(C-T)xUO/sub 2/PO/sub 4/ (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 UO/sup 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 Br/sub 2/ 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.

• Research Organization: Wisconsin Univ., Madison (USA). Dept. of Chemistry
• OSTI ID: 6091575
• Report Number(s): AD-A-182964/7/XAB; UWIS/DC/TR-87/1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical &amp; Physicochemical Properties
ACID PHOSPHATES
ACTINIDE COMPOUNDS
CHEMICAL REACTIONS
CHEMISTRY
CRYSTALS
DECAY
EQUIPMENT
LUMINESCENCE
OPTICAL EQUIPMENT
OXIDATION
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHOTOLUMINESCENCE
POWDERS
PROBES
REDOX REACTIONS
SAMPLING
SPECTRA
SYMMETRY
URANIUM COMPOUNDS
URANYL COMPOUNDS
URANYL PHOSPHATES