TY - JOUR
T1 - Ionic plastic phase in piperidinium hexafluorophosphate studied by solid nmr, x-ray diffraction, and thermal measurements
AU - Ono, Hiroshi
AU - Ishimaru, Shin'ichi
AU - Ikcda, Ryuichi
AU - Ishida, Hiroyuki
PY - 1998/1/1
Y1 - 1998/1/1
N2 - Measurements of 1H, 19F, and 31P NMR, differential scanning calorimetry (DSC) and X-ray powder diffraction were carried out in piperidinium hexafluorophosphate ([C5H10NH2]PF6). Three solid phases were observed by DSC in the range from 150 K to the melting point of 517 K. The highest-temperature phase was determined to form a CsCl-type cubic lattice with a=6.21(3) Å, Z=l, V= 240(4) Å3, and Dx= 1.60(3) Mg m-3. From the NMR measurements in this phase, both cation and anion were revealed to perform self-diffusion as well as isotropic rotation. These molecular motions and thermal properties indicate that this phase is an ionic plastic phase.
AB - Measurements of 1H, 19F, and 31P NMR, differential scanning calorimetry (DSC) and X-ray powder diffraction were carried out in piperidinium hexafluorophosphate ([C5H10NH2]PF6). Three solid phases were observed by DSC in the range from 150 K to the melting point of 517 K. The highest-temperature phase was determined to form a CsCl-type cubic lattice with a=6.21(3) Å, Z=l, V= 240(4) Å3, and Dx= 1.60(3) Mg m-3. From the NMR measurements in this phase, both cation and anion were revealed to perform self-diffusion as well as isotropic rotation. These molecular motions and thermal properties indicate that this phase is an ionic plastic phase.
KW - Diffusion
KW - Ionic plastic crystal
KW - Nuclear magnetic resonance
KW - Phase transitions
KW - Spectroscopy
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U2 - 10.1002/bbpc.19981020408
DO - 10.1002/bbpc.19981020408
M3 - Article
AN - SCOPUS:0032047850
SN - 0940-483X
VL - 102
SP - 650
EP - 655
JO - Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics
JF - Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics
IS - 4
ER -