Molecular dynamics in ferroelectric 4-aminopyridinium tetrachloroantimonate(III), [4-NH2C5H 4NH][SbCl4]
Medycki W.1, Hołderna-Natkaniec K.2, Swiergiel J.2, Jakubas R.3
- 1Institute of Molecular Physics, Polish Academy of Sciences (PAS), Smoluchowskiego 17, 60-179 Poznan, Poland
- 2Departament of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland
- 3Faculty of Chemistry, Wroclaw University, Joliot-Curie 14, 50-383 Wroclaw, Poland
Solid State Nuclear Magnetic Resonance, 24 (4), pp.209-217, 2003
DOI:: 10.1016/j.ssnmr.2003.07.001
Abstract:
Proton spin-lattice relaxation time and second moment of polycrystalline [4-NH2C5H4NH][SbCl4] have been determined at 160-400K, at 90 and 25MHz. The temperature dependence of the second moment indicates that the cation is in the "frozen" state over that temperature range, while at higher temperatures it oscillates at an angle of 135° to the pseudo-six-fold axis of the aromatic ring. Weak influence of different phase transitions on the temperature dependences of relaxation times T1 and T1D can be explained in terms of molecular dynamics. © 2003 Elsevier Inc. All rights reserved.
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