Ionic plastic phase in piperidinium hexafluorophosphate studied by solid nmr, x-ray diffraction, and thermal measurements

Hiroshi Ono; Shin'ichi Ishimaru; Ryuichi Ikcda; Hiroyuki Ishida

doi:10.1002/bbpc.19981020408

Ionic plastic phase in piperidinium hexafluorophosphate studied by solid nmr, x-ray diffraction, and thermal measurements

Hiroshi Ono, Shin'ichi Ishimaru, Ryuichi Ikcda, Hiroyuki Ishida

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

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 D_x= 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.

Original language	English
Pages (from-to)	650-655
Number of pages	6
Journal	Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics
Volume	102
Issue number	4
DOIs	https://doi.org/10.1002/bbpc.19981020408
Publication status	Published - Jan 1 1998
Externally published	Yes

Keywords

Diffusion
Ionic plastic crystal
Nuclear magnetic resonance
Phase transitions
Spectroscopy

ASJC Scopus subject areas

Chemical Engineering(all)

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10.1002/bbpc.19981020408

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title = "Ionic plastic phase in piperidinium hexafluorophosphate studied by solid nmr, x-ray diffraction, and thermal measurements",

abstract = "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) {\AA}, Z=l, V= 240(4) {\AA}3, 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.",

keywords = "Diffusion, Ionic plastic crystal, Nuclear magnetic resonance, Phase transitions, Spectroscopy",

author = "Hiroshi Ono and Shin'ichi Ishimaru and Ryuichi Ikcda and Hiroyuki Ishida",

year = "1998",

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doi = "10.1002/bbpc.19981020408",

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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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JO - Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics

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ER -

Ionic plastic phase in piperidinium hexafluorophosphate studied by solid nmr, x-ray diffraction, and thermal measurements

Abstract

Keywords

ASJC Scopus subject areas

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