Molecular Dynamics in Paraelectric Phase of KH2PO4 Crystals Studied by Single Crystal NMR and MAS NMR

被引：3

作者：

Paik, Younkee ^{[1
]}

Chang, Celesta L. ^{[2
]}

机构：

[1] Korea Basic Sci Inst, Daegu Ctr, Daegu 702701, South Korea

[2] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

来源：

JOURNAL OF THE KOREAN MAGNETIC RESONANCE SOCIETY | 2013年 / 17卷 / 01期

关键词：

NMR; CP/MAS NMR; Crystal growth; Phase transition; Ferroelctrics;

D O I：

10.6564/JKMRS.2013.17.1.019

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The temperature dependences of the NMR spectrum and the spin-lattice relaxation times in KH2PO4 were investigated via single-crystal NMR and MAS NMR. The stretched-exponential relaxation that occurred because of the distribution of correlation times was indicative of the degree of the distribution of the double-well potential on the hydrogen bond. The behaviors responsible for the strong temperature dependences of the 1H and 31P spin-lattice relaxation times in the rotating frame T1. in KH2PO4 are likely related to the reorientational motion of the hydrogen-bond geometry and the PO4 tetrahedral distortion.

引用

页码：19 / 23

页数：5

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