~1H and ~(19)F NMR Study of Cation and Anion Motions in Guanidinium Fluoroantimonates

M. Grottel; A. Kozak; Z. Pajak

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~1H and ~(19)F NMR Study of Cation and Anion Motions in Guanidinium Fluoroantimonates

机译：〜1H和〜（19）F NMR研究氟锑酸胍中阳离子和阴离子的运动

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Proton and fluorine NMR linewidths, second moments, and spin-lattice relaxation times of polycrystalline [C(NH_2)_3]_2SbF_5 and C(NH_2)_3SbF_6 were studied in a wide temperature range. For the pentafluoroantimonate, C_3-reorientation of the guanidinium cation and C_4-reorientation of the SbF_5 anion were revealed and their activation parameters determined. The dynamical inequivalence of the two guanidinium cations was evidenced. For the hexafluoroantimonate, two solid-solid phase transitions were found. In the low temperature phase the guanidinium cation undergoes C_3 reorien-tation while the SbF_6 anion reorients isotropically. The respective activation parameters were derived. At high temperatures new ionic plastic phases were evidenced.

机译：在较宽的温度范围内研究了多晶[C（NH_2）_3] _2SbF_5和C（NH_2）_3SbF_6的质子和氟核磁共振线宽，第二矩和自旋晶格弛豫时间。对于五氟锑酸盐，揭示了胍鎓阳离子的C 3-取向和SbF 5阴离子的C 4-取向，并确定了它们的活化参数。证明了两个胍阳离子的动力学不等价性。对于六氟锑酸盐，发现了两个固-固相变。在低温阶段，胍盐阳离子经历C_3重新取向，而SbF_6阴离子则各向同性地取向。导出了各个激活参数。在高温下，新的离子塑性相被证明。

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来源
《Zeitschrift fur Naturforschung. A, A journal of physical sciences》 |1995年第8期|p.742-748|共7页
作者
M. Grottel; A. Kozak; Z. Pajak;
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作者单位

Department of Physics, Academy of Agriculture, 60-637 Poznan, Poland;

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正文语种 eng
中图分类物理学;
关键词
NMR; molecular motions; phase transitions;

机译：核磁共振;分子运动;相变;

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~1H and ~(19)F NMR Study of Cation and Anion Motions in Guanidinium Fluoroantimonates

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