MOLECULAR-DYNAMICS IN TETRAMETHYL AMMONIUM HEXABROMO SELENATE [N(CH3)4]2SEBR(6) - A PROTON NMR-STUDY

被引：0

作者：

MURTHY, BVS ^{[1
]}

RAMESH, KP ^{[1
]}

RAMAKRISHNA, J ^{[1
]}

机构：

[1] INDIAN INST SCI,DEPT PHYS,BANGALORE 560012,KARNATAKA,INDIA

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 1993年 / 48卷 / 8-9期

关键词：

MOLECULAR DYNAMICS; 2ND MOMENT; NMR; SPIN-LATTICE RELAXATION TIME;

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

H-1 spin-lattice relaxation time T1 and second moment M2 have been studied as a function of temperature over the temperature range 445 to 77 K. A discontinuous change in T1 at 365 K, indicates the presence of a phase transition, while the slope change at 152 K, is attributed to a change in the TMA ion dynamics from tumbling to torsion. The T1 results could be explained in terms of inequivalent TMA ions and their small angle torsional oscillations. A second moment (M2) transition occurs around 160 K and is ascribed to the freezing of TMA tumbling and CH3 reorientation.

引用

页码：868 / 870

页数：3

共 15 条

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