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Inorganic Radicals Trapped in Glasses at Room Temperature. IV. Silver Radicals in Metaphosphate Glass

Tova Feldmann, A. Treinin

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Abstract

The effect of x irradiation on silver-activated metaphosphate glass was investigated. The optical and ESR absorptions were measured and assigned to Ag2+, Ag2+ and Ag0. Their optical bands have maxima at 275, 315, and 365 mμ, respectively. The silver atoms, stable at 77°K, show little chemical interaction with the matrix. A new color center which belongs to the base glass has been identified. It results from the reaction of electrons with the phosphate polymers and exhibits a large hyperfine coupling. Its nature is discussed.

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The effect of x irradiation on silver-activated metaphosphate glass was investigated. The optical and ESR absorptions were measured and assigned to Ag2+, Ag2+ and Ag0. Their optical bands have maxima at 275, 315, and 365 mμ, respectively. The silver atoms, stable at 77°K, show little chemical interaction with the matrix. A new color center which belongs to the base glass has been identified. It results from the reaction of electrons with the phosphate polymers and exhibits a large hyperfine coupling. Its nature is discussed.

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Available abstract

The effect of x irradiation on silver-activated metaphosphate glass was investigated. The optical and ESR absorptions were measured and assigned to Ag2+, Ag2+ and Ag0. Their optical bands have maxima at 275, 315, and 365 mμ, respectively. The silver atoms, stable at 77°K, show little chemical interaction with the matrix. A new color center which belongs to the base glass has been identified. It results from the reaction of electrons with the phosphate polymers and exhibits a large hyperfine coupling. Its nature is discussed.

Key concepts: Metaphosphate, Phosphate glass, Radical, Glass transition, Electron paramagnetic resonance, Photochemistry, Polymer, Chemistry

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