MOLECULAR MOTIONS IN SOLID (CH3NH3)(5)BI2CL11 AS STUDIED BY PROTON NUCLEAR-MAGNETIC-RESONANCE

被引：4

作者：

DECRESSAIN, R

COCHON, E

LEFEBVRE, J

MEURER, B

JAKUBAS, R

机构：

[1] INST CHARLES SADRON,F-67083 STRASBOURG,FRANCE

[2] UNIV WROCLAW,INST CHEM,WROCLAW,POLAND

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1994年 / 55卷 / 02期

关键词：

METHYLAMMONIUM HALOGENOBISMUTHATE(III); PHASE TRANSITIONS; NMR;

D O I：

10.1016/0022-3697(94)90070-1

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The temperature dependencies of the H-1 spin-lattice relaxation times (T-1z,T-1 rho), and the second moment M(2) of proton NMR absorption were measured for solid (CH3NH3), Bi2Cl11 and its partially deuterated analogs between 100 and 350 K. The results show that the methylammonium cations undergo rapid overall rotation in the room temperature phase, and rotations around the C-3 axis in the low temperature phase. The activation energies associated with those motions were obtained using a BPP model. The NMR results relating to the three phases of these compounds are discussed and compared with other studies.

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收藏

页码：139 / 144

页数：6

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