Electron spin resonance study of X-irradiated single crystals of silver(I) nitrate-butanedinitrile (1/1).
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概要
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ESR spectra of single crystals of silver(I) nitrate–butanedinitrile(1/1) were measured at 77 K. Two paramagnetic centers, –CN···Ag<SUP>2+</SUP>···NC– and NO<SUB>3</SUB><SUP>2−</SUP>···Ag<SUP>+</SUP>, appeared simultaneously on X-irradiation at 77 K. The principal values of the <I>g</I> value (<I>g</I>) and the hyperfine coupling constants (<I>A</I> in the units of 10<SUP>−1</SUP> cm<SUP>−4</SUP>) were <I>g</I><SUB>1</SUB>=2.050, <I>g</I><SUB>2</SUB>=2.053, and <I>g</I><SUB>3</SUB>=2.302, <I>A</I>(Ag)<SUB>1</SUB>=21.8, <I>A</I>(Ag)<SUB>2</SUB>=22.0, <I>A</I>(Ag)<SUB>3</SUB>=34.9, <I>A</I>(N)<SUB>1</SUB>=15.3, <I>A</I>(N)<SUB>2</SUB>=15.9, and <I>A</I>(N)<SUB>3</SUB>=14.0 for the first center, and <I>g</I><SUB>⁄⁄</SUB>=2.001, <I>g</I><SUB>⊥</SUB>=2.006, <I>A</I>(Ag)<SUB>⁄⁄</SUB>=20.3, <I>A</I>(Ag)<SUB>⊥</SUB>=17.4, <I>A</I>(N)<SUB>⁄⁄</SUB>=59.4, and <I>A</I>(N)<SUB>⊥</SUB>=32.8 for the second center. When the crystals X-irradiated at 77 K were exposed to visible light, the two centers disappeared simultaneously and the NO<SUB>2</SUB> radicals increased. When the crystals X-irradiated at 77 K were warmed to room temperature, the first center changed to a new paramagnetic center, in which the unpaired electron coupled with a silver nucleus, two equivalent nitrogen nuclei, and a proton.
- 公益社団法人 日本化学会の論文
著者
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Kurita Yukio
Department Of Materials Chemistry Faculty Of Engineering Yokohama National University
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Ohigashi Hiroji
Basic Research Laboratories Toray Industries Inc.
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