NMR Studies of a Nanocomposite Based on Molecular Ferroelectric Diisopropylammonium Bromide

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NMR Studies of a Nanocomposite Based on Molecular Ferroelectric Diisopropylammonium Bromide. / Uskova, N. I.; Charnaya, E. V.; Podorozhkin, D. Yu.; Baryshnikov, S. V.; Milinskiy, A. Yu.; Egorova, I. V.; Nefedov, D. Yu.

в: Applied Magnetic Resonance, Том 51, № 2, 01.02.2020, стр. 129-134.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{9a512b8ca1bc43499e904ffc323540e7,

title = "NMR Studies of a Nanocomposite Based on Molecular Ferroelectric Diisopropylammonium Bromide",

abstract = "The properties of the molecular ferroelectric diisopropylammonium bromide (C6H16BrN, DIPAB) particles embedded into a nanoporous opal matrix were studied by high-resolution nuclear magnetic resonance (NMR) in the temperature range from 295 to 450 K. The 13C NMR spectra were obtained using CP-MAS technique. The results showed that structural changes in nanostructured DIPAB particles are more complex than it was previously expected. The NMR spectra of DIPAB embedded into the opal matrix revealed the coexistence of two different crystalline structures within a wide temperature range. The monoclinic ferroelectric and orthorhombic non-polar phases were seen in nanoconfined DIPAB at room temperature, meanwhile the orthorhombic phase only was found in the bulk DIPAB crystalline powder. The NMR spectra showed that the transition from the orthorhombic to the ferroelectric phase upon heating is reconstructive. The total nanocomposite transforms into the ferroelectric structure at a temperature much higher than that for the relevant transition in bulk. The size effect also leads to the increase of the temperature of the phase transition from the ferroelectric P21 phase to the P21/m paraphrase.",

keywords = "DIELECTRIC-PROPERTIES, PHASE-TRANSITIONS, TEMPERATURE, GROWTH, FILMS",

author = "Uskova, {N. I.} and Charnaya, {E. V.} and Podorozhkin, {D. Yu.} and Baryshnikov, {S. V.} and Milinskiy, {A. Yu.} and Egorova, {I. V.} and Nefedov, {D. Yu.}",

note = "Uskova, N.I., Charnaya, E.V., Podorozhkin, D.Y. et al. NMR Studies of a Nanocomposite Based on Molecular Ferroelectric Diisopropylammonium Bromide. Appl Magn Reson 51, 129–134 (2020). https://doi.org/10.1007/s00723-019-01168-y",

year = "2020",

month = feb,

day = "1",

doi = "10.1007/s00723-019-01168-y",

language = "English",

volume = "51",

pages = "129--134",

journal = "Applied Magnetic Resonance",

issn = "0937-9347",

publisher = "Springer Nature",

number = "2",

}

RIS

TY - JOUR

T1 - NMR Studies of a Nanocomposite Based on Molecular Ferroelectric Diisopropylammonium Bromide

AU - Uskova, N. I.

AU - Charnaya, E. V.

AU - Podorozhkin, D. Yu.

AU - Baryshnikov, S. V.

AU - Milinskiy, A. Yu.

AU - Egorova, I. V.

AU - Nefedov, D. Yu.

N1 - Uskova, N.I., Charnaya, E.V., Podorozhkin, D.Y. et al. NMR Studies of a Nanocomposite Based on Molecular Ferroelectric Diisopropylammonium Bromide. Appl Magn Reson 51, 129–134 (2020). https://doi.org/10.1007/s00723-019-01168-y

PY - 2020/2/1

Y1 - 2020/2/1

N2 - The properties of the molecular ferroelectric diisopropylammonium bromide (C6H16BrN, DIPAB) particles embedded into a nanoporous opal matrix were studied by high-resolution nuclear magnetic resonance (NMR) in the temperature range from 295 to 450 K. The 13C NMR spectra were obtained using CP-MAS technique. The results showed that structural changes in nanostructured DIPAB particles are more complex than it was previously expected. The NMR spectra of DIPAB embedded into the opal matrix revealed the coexistence of two different crystalline structures within a wide temperature range. The monoclinic ferroelectric and orthorhombic non-polar phases were seen in nanoconfined DIPAB at room temperature, meanwhile the orthorhombic phase only was found in the bulk DIPAB crystalline powder. The NMR spectra showed that the transition from the orthorhombic to the ferroelectric phase upon heating is reconstructive. The total nanocomposite transforms into the ferroelectric structure at a temperature much higher than that for the relevant transition in bulk. The size effect also leads to the increase of the temperature of the phase transition from the ferroelectric P21 phase to the P21/m paraphrase.

AB - The properties of the molecular ferroelectric diisopropylammonium bromide (C6H16BrN, DIPAB) particles embedded into a nanoporous opal matrix were studied by high-resolution nuclear magnetic resonance (NMR) in the temperature range from 295 to 450 K. The 13C NMR spectra were obtained using CP-MAS technique. The results showed that structural changes in nanostructured DIPAB particles are more complex than it was previously expected. The NMR spectra of DIPAB embedded into the opal matrix revealed the coexistence of two different crystalline structures within a wide temperature range. The monoclinic ferroelectric and orthorhombic non-polar phases were seen in nanoconfined DIPAB at room temperature, meanwhile the orthorhombic phase only was found in the bulk DIPAB crystalline powder. The NMR spectra showed that the transition from the orthorhombic to the ferroelectric phase upon heating is reconstructive. The total nanocomposite transforms into the ferroelectric structure at a temperature much higher than that for the relevant transition in bulk. The size effect also leads to the increase of the temperature of the phase transition from the ferroelectric P21 phase to the P21/m paraphrase.

KW - DIELECTRIC-PROPERTIES

KW - PHASE-TRANSITIONS

KW - TEMPERATURE

KW - GROWTH

KW - FILMS

UR - http://www.scopus.com/inward/record.url?scp=85074646532&partnerID=8YFLogxK

U2 - 10.1007/s00723-019-01168-y

DO - 10.1007/s00723-019-01168-y

M3 - Article

AN - SCOPUS:85074646532

VL - 51

SP - 129

EP - 134

JO - Applied Magnetic Resonance

JF - Applied Magnetic Resonance

SN - 0937-9347

IS - 2

ER -

ID: 51754906