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Molecular Motion Studied by Proton Magnetic Resonance in a [N(CH 3 ) 4 ] 2 ZnCl 4 Single Crystal
Author(s) -
Lim Ae Ran,
Hyung Kyung Woo,
Hong Kwan Soo,
Jeong SeYoung
Publication year - 2000
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200006)219:2<389::aid-pssb389>3.0.co;2-s
Subject(s) - spin–lattice relaxation , relaxation (psychology) , proton , atmospheric temperature range , proton magnetic resonance , chemistry , ion , nuclear magnetic resonance , line width , crystal (programming language) , crystallography , physics , thermodynamics , optics , nuclear physics , psychology , social psychology , organic chemistry , computer science , programming language
The proton NMR line width and spin–lattice relaxation times for [N(CH 3 ) 4 ] 2 ZnCl 4 single crystal were studied over a wide temperature range. Proton spin–lattice relaxation time measurements on [N(CH 3 ) 4 ] 2 ZnCl 4 yielded a minimum, which were attributed to the effect of molecular tumbling. It seems obvious that the high‐temperature minima of T 1 is attributable to the tumbling motion of [N(CH 3 ) 4 ] ions, and that the T 1 below 161 K is attributable to the same molecular motion which dominates at 210 K. Then, the T 1 below 161 K undergoes a slow motion. The activation energies in phase VI and IV were determined to be 13.94 and 22.49 kJ/mol, respectively.