Ionic dynamics in the rotator phase of n-alkylammonium chlorides (C6–C10), studied by 1H nuclear magnetic resonance, electrical conductivity and thermal measurements

摘要: 1 H NMR, electrical conductivity and thermal measurements have been performed on the rotator phase of n-alkylammonium chlorides CnH2n+1 NH3Cl (n= 6–10). Rapid two-dimensional self-diffusion uniaxial rotation long rod-like cations were observed in all salts studied by measuring 1H NMR spin–lattice relaxation times T1 T1ρ, indicating highly disordered structure phase. Marked ionic was detected this a.c. which increased to ca. 10–2 S m–1 near respective melting temperatures. Analysing data, it found that anions also diffuse a similar extent cations. From characteristic dynamic behaviour phase, together with small entropies (<20 J K–1 mol–1) reported, can be considered low-dimensional plastic crystal or an intermediate state between smectic liquid crystal.