FERROELECTRIC PHASE-TRANSITION OF THE DISUBSTITUTED DIACETYLENE 1,6-BIS(2,4-DINITROPHENOXY)-2,4-HEXADIYNE - ANALYSIS BY NMR AND X-RAY STUDIES

被引：9
|
作者：
WINTER, H
DORMANN, E
BERTAULT, M
TOUPET, L
机构：
[1] UNIV BAYREUTH,BAYREUTHER INST MAKROMOLEK FORSCH,W-8580 BAYREUTH,GERMANY
[2] UNIV BAYREUTH,INST PHYS,W-8580 BAYREUTH,GERMANY
[3] UNIV RENNES 1,PHYS CRISTALLINE GRP,F-35042 RENNES,FRANCE
来源：
PHYSICAL REVIEW B | 1992年 / 46卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.46.8057
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Proton-NMR and x-ray measurements were used to analyze the ferroelectric phase transition of the disubstituted diacetylene 1,6-bis(2,4-dinitrophenoxy)-2,4-hexadiyne (DNP), in which the phase transition is accompanied by a molecular twisting. Proton-spin-lattice relaxation is analyzed as function of Larmor frequency, temperature, and orientation of the single crystals. The molecular motions relevant for the dielectric phase transition and causing the loss of the center of symmetry of DNP single crystals are reflected by these NMR results and by detailed x-ray analysis at three different temperatures.
引用
收藏
页码：8057 / 8066
页数：10
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