High power electron spin echo modulation studies of silver atom solvation and desolvation in ice matrices: Geometrical models for silver cation and silver atom aqueous solvation shells
High power electron spin echo modulation patterns have been obtained at 4.2 K and analyzed for presolvated silver atoms produced at 4.2 K in a nonequilibrium environment by radiolysis of deuterated ice matrices containing AgF, and for solvated silver atoms produced by brief annealing at 77 K. The analysis shows that presolvated Ag/sup 0/ is surrounded by eight equivalent deuterons at 3.1 +- 0.1 A with zero isotropic hyperfine coupling which suggests a tetrahedral model of four waters with their dipoles pointed away from Ag/sup 0/ (i.e., a solvated Ag/sup +/ geometry). Solvated Ag/sup 0/ has one deuteron at 1.7 +- 0.05 A with a 1.8 MHz isotropic hyperfine coupling and seven deuterons at 3.1 +- 0.1 A with zero isotropic hyperfine coupling. The solvation process appears to occur by rotation of one water around one of its OD bonds with no change in the Ag--O distance.
- Research Organization:
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202
- OSTI ID:
- 5794263
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 71:9; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Regulations-- (-1989)
54 ENVIRONMENTAL SCIENCES
AQUEOUS SOLUTIONS
CATIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DISPERSIONS
ELECTRON SPIN RESONANCE
ELEMENTS
ICE
IONS
MAGNETIC RESONANCE
METALS
MIXTURES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
RESONANCE
SILVER
SOLUTIONS
SOLVATION
TRANSITION ELEMENTS