NMR Investigation on Isotope Effect of Glycinium Phosphite H_3NCH_2COOH・H_2PO_3
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概要
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The motions of the phosphite anions and glycinium cations in H_3NCH_2COOH・H_2PO_3 (GPI) and its deuterated analogue (DGPI) were investigated by ^1H, ^<13>C and ^<31>P spin-lattice relaxation times T_1. For both GPI and DPGI, T_1's of the ^1H, ^<13>C and ^<31>P nuclei reflect the amino rotation, methylene libration and motion of the phosphite anions, respectively. Activation energies obtained from T_1's of ^1H, ^<13>C and ^<31>P nuclei are 28.6(2), 26.0(4) and 26.2(4) kJ/mol for GPI and are 34.9(6), 27(1), 47(2) kJ/mol for DGPI, respectively. The deuterium substitution increases E_a for the motion influenced by the hydrogen bonding. In all the observed motions, correlation times of DGPI are larger than those of GPI.
- 社団法人日本物理学会の論文
- 2003-06-15
著者
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MACHIDA Mitsuo
Department of Physics, Kyushu University
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ISHIBASHI Toku
Department of Physics, Kyushu University
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Machida Mitsuo
Department Of Chemistry And Physics Condensed Matter Kyosho University
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Ishibashi Toku
Department Of Chemistry And Physics Condensed Matter Kyosho University
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