Effect of Proton Substitution in Li2RbH(SO4)2 Single Crystal Studied by Nuclear Magnetic Resonance Relaxation
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This study investigated the effect of proton substitution on the phase transitions of Li2RbH(SO4)2 crystals. In order to determine the effects on the molecular motions of Li2RbH(SO4)2 crystals, we compared nuclear magnetic resonance (NMR) relaxation measurements with those of LiRbSO4 crystals. The spin–lattice relaxation time of 87Rb shows similar trends in Li2RbH(SO4)2 and LiRbSO4 crystals, whereas that of 7Li shows different trends. The main effects produced by the substitution of protons are demonstrated in the variations of the phase transition temperatures and the molecular motions. Lithium and protons in Li2RbH(SO4)2 have higher mobilities than lithium in LiRbSO4.
This research was supported by the Basic Science Research program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2018R1D1A1B07041593).
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