^<45>Sc Nuclear Magnetic Resonance and Phase Transitions in Scandium Acetates, Sc(CH_3COO)_3 and Sc(CD_3COO)_3
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概要
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The first-order and second-order quadrupolar shifts of the ^<45>Sc nuclear magnetic resonance (NMR) spectrum were investigated in the range of 4 to 300 K in relation to the structural phase transitions of Sc(CH_3COO)_3 and Sc(CD_3COO)_3. It was found that the transition temperature (T_c) of the deuterated compound was lower (158 K) than that of the protonated compound (167 K). Below the transition temperature, two sets of first-order quadrupolar shifts in the ^<45>Sc NMR spectrum were clearly distinguished, which correspond to the two different sites of scandium ions in the crystal. The magnitude of the splitting, δ(Δν_Q), between the two different shifts decreased upon heating to T_c, exhibiting the critical phenomena described by the formula, δ(Δν_Q)∝[(T_c-T)/T_c]^β, whereβis close to 1/2 for both isotopic derivatives.
- 社団法人日本物理学会の論文
- 1993-05-15
著者
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山下 洋
京都大学フィールド科学教育研究センター舞鶴水産実験所里海生態保全学分野
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TAKEDA Sadamu
Department of Chemistry,Faculty of Science,Osaka University
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Kataoka Hiroshi
Department of Applied Chemistry and Biotechnology, Niigata Institute of Technology
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NAKAMURA Nobuo
Department of Cardiovascular Medicine, Wakayama Medical University
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Kataoka H
Univ. Tokyo Tokyo Jpn
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Nakamura Nobuo
Department Of Cardiovascular Medicine Wakayama Medical University
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Kodama Hisashi
Central Research Institute Japan Tabacco Inc.
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Kataoka Hiroshi
Institute Of Applied Biochemistry University Of Tsukada
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Takeda Sadamu
Department Of Chemistry Faculty Of Science Osaka University
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Nakamura Nobuo
Department Of Cardiology Seiyu Memorial Hospital
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Kataoka Hiroshi
Department Of Applied Biological Technology The University Of Tokyo
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KATAOKA Hiroshi
Department of Agricultural Chemistry, The University of Tokyo
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