Molecular Motions and Polymorphic Phase Transitions in (CH3)4NClO4, and (CH3), NHCl04 as Studied by NMR

摘要: The temperature dependences of the proton spin-lattice relaxation times T1, T1p, and T1D as well second moment M2, are reported for phase II tetramethylammonium perchlorate (CH3)4, NClO4, phases III, II, I trimethylammonium (CH3), NHCl04. An analysis these data allows to reveal various molecular motions in appropriate modifications determine their activation energies correlation times. Temperaturabhlngige Messungen der Proton-Spin–Gitter-Relaxationszeiten T1p und sowie zweiten Momente werden an Tetramethylammoniumperchlorat (Phase II) Trimethylammoniumperchlorat (CH2)2, (Phasen I) durchgefuhrt. Die Analyse Daten ermoglicht die Charakterisierung verschiedener molekularer Bewegungen den einzelnen Phasen Bestimmung entsprechenden Korrelationszeiten Aktivierungsenergien.