PROTON NMR INVESTIGATION OF MOLECULAR-DYNAMICS IN [N(CH3)4]3 SB2BR9 (TEMABA)

被引:6
作者
JAGADEESH, B
RAJAN, PK
VENU, K
SASTRY, VSS
机构
[1] School of Physics, University of Hyderabad, Hyderabad
关键词
NUCLEAR MAGNETIC RESONANCE; SPIN LATTICE RELAXATION TIME; STRUCTURAL PHASE TRANSITIONS; MOLECULAR DYNAMICS; N(CH3)4]3 SB2BR9; 2ND MOMENT;
D O I
10.1016/0022-3697(93)90230-O
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Cation dynamics in tris (tetra-methylammonium) nonabromodiantimonate, which shows structural phase transitions, are studied through proton spin lattice relaxation measurements (at two Larmor frequencies) and line width measurements. Results show a clear signature of a phase transition at 189 K and the existence of dynamically inequivalent methyl groups. The dynamics of the cation as a whole are found to be less hindered above this temperature. Activation energies associated with the dynamics of the cations and methyl groups are calculated.
引用
收藏
页码:527 / 531
页数:5
相关论文
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