Fast-proton transport in hydrazine sulphate. II. NMR linewidth and relaxation studies

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Abstract
For pt.I see ibid., vol.16, no.16, p.3081 (1983). The proton mobility has been observed in hydrazine sulphate (H2H6SO4) from NMR studies. The linewidth has been measured as a function of temperature. It shows a sudden line narrowing at 150K indicating that the H+ are mobile at temperatures higher than this. Further, a minor hump in the linewidth curve is obtained at 228K which indicates a structural change. The relaxation time measurement (T1 and T2) also confirms the above conclusion. From the linewidth data at different temperatures, the jump attempt frequency is estimated to be about 1011 s-1. The low attempt frequency of about 1011 s-1 is nearly the proton tunnelling frequency suggesting H+ motion.