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NON-ARRHENIUS BEHAVIOUR OF NMR SELF-DIFFUSION OF THE NEAT ROOM TEMPERATURE IONIC LIQUID 1-BUTYL-3- METHYL IMIDAZOLIUM TETRAFLUOROBORATE [BMIM][BF4].

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Title: NON-ARRHENIUS BEHAVIOUR OF NMR SELF-DIFFUSION OF THE NEAT ROOM TEMPERATURE IONIC LIQUID 1-BUTYL-3- METHYL IMIDAZOLIUM TETRAFLUOROBORATE [BMIM][BF4].
Alternate Title: NE ARENIJAUS TIPO DIFUZIJA JONINIAME SKYSTYJE 1-BUTIL-3- METILIMIDAZOLIO TETRAFLUOROBORATE [BMIM][BF4 ], TIRTA DOSY BMR METODU.
Authors: Klimavičius, V.1 vytautas.klimavicius@ff.vu.lt, Gdaniec, Z.2
Source: Lithuanian Journal of Physics. 2026, Vol. 66 Issue 2, p69-74. 6p.
Subjects: Diffusion coefficients, Arrhenius equation, Glass transition temperature, Ionic liquids, Nuclear magnetic resonance spectroscopy
Abstract (English): Room temperature ionic liquid (RTIL) 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4 ]) was investigated using 1 H, 19F, 11B and 10B DOSY NMR spectroscopy in a temperature range of 288-338 K. The dynamics of the [BF4 ] anion and [bmim] cation have been found to be similar, indicating that both constituents behave as a rigid unit in the studied temperature range. The diffusion coefficients varied from 6.9 ∙ 10-11 m² s-1 at the highest temperature to 6.1 ∙ 10-12 m² s-1 at the lowest temperature. The dynamics of the diffusion coefficient was found not obeying the Arrhenius law and therefore was analyzed using the Vogel-Fulcher-Tammann (VFT) equation for the diffusivity. The glass transition temperature was found to be in a range of 172-181 K, which coincides with the values obtained using other techniques and found in the literature; the parameter B which is related to activation energy was found equal to 828-1115 K. [ABSTRACT FROM AUTHOR]
Abstract (Lithuanian): Kambario temperatūros joninis skystis (RTIL) 1-butil-3-metilimidazolio tetrafluoroboratas ([bmim] [BF4 ]) buvo tirtas 288-338 K temperatūrų intervale naudojant 1 H, 19F, 11B ir 10B DOSY (Diffusion Ordered Spectroscopy) branduolių magnetinio rezonanso (BMR) spektroskopiją. Nustatyta, kad [BF4 ] anijono ir [bmim] katijono dinamika yra palyginama, todėl galima teigti, jog RTIL dinamika yra vienoda tirtame temperatūrų intervale. Difuzijos koeficientai kito nuo 6,9 ∙ 10-11 m²/s esant aukščiausiai temperatūrai iki 6,1∙10-12 m-2/s esant žemiausiai temperatūrai. Nustatyta, kad difuzijos koeficiento temperatūrinė priklausomybė neatitinka Arenijaus dėsnio, todėl ji buvo analizuota naudojant Vogelio-Fulcherio-Tammanno (VFT) lygtį difuzijos procesui aprašyti. Tirtajam RTIL stiklėjimo temperatūra nustatyta 172-181 K intervale; ši vertė sutampa su reikšmėmis, gautomis kitais metodais ir pateikiamomis literatūroje. Parametras B, susijęs su aktyvacijos energija, nustatytas lygus 828-1115 K. [ABSTRACT FROM AUTHOR]
Copyright of Lithuanian Journal of Physics is the property of Lithuanian Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: NON-ARRHENIUS BEHAVIOUR OF NMR SELF-DIFFUSION OF THE NEAT ROOM TEMPERATURE IONIC LIQUID 1-BUTYL-3- METHYL IMIDAZOLIUM TETRAFLUOROBORATE [BMIM][BF<subscript>4</subscript>].
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  Data: NE ARENIJAUS TIPO DIFUZIJA JONINIAME SKYSTYJE 1-BUTIL-3- METILIMIDAZOLIO TETRAFLUOROBORATE [BMIM][BF4 ], TIRTA DOSY BMR METODU.
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  Data: <searchLink fieldCode="AR" term="%22Klimavičius%2C+V%2E%22">Klimavičius, V.</searchLink><relatesTo>1</relatesTo><i> vytautas.klimavicius@ff.vu.lt</i><br /><searchLink fieldCode="AR" term="%22Gdaniec%2C+Z%2E%22">Gdaniec, Z.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Lithuanian+Journal+of+Physics%22">Lithuanian Journal of Physics</searchLink>. 2026, Vol. 66 Issue 2, p69-74. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Diffusion+coefficients%22">Diffusion coefficients</searchLink><br /><searchLink fieldCode="DE" term="%22Arrhenius+equation%22">Arrhenius equation</searchLink><br /><searchLink fieldCode="DE" term="%22Glass+transition+temperature%22">Glass transition temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Ionic+liquids%22">Ionic liquids</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+magnetic+resonance+spectroscopy%22">Nuclear magnetic resonance spectroscopy</searchLink>
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: Room temperature ionic liquid (RTIL) 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4 ]) was investigated using 1 H, 19F, 11B and 10B DOSY NMR spectroscopy in a temperature range of 288-338 K. The dynamics of the [BF4 ] anion and [bmim] cation have been found to be similar, indicating that both constituents behave as a rigid unit in the studied temperature range. The diffusion coefficients varied from 6.9 ∙ 10-11 m² s-1 at the highest temperature to 6.1 ∙ 10-12 m² s-1 at the lowest temperature. The dynamics of the diffusion coefficient was found not obeying the Arrhenius law and therefore was analyzed using the Vogel-Fulcher-Tammann (VFT) equation for the diffusivity. The glass transition temperature was found to be in a range of 172-181 K, which coincides with the values obtained using other techniques and found in the literature; the parameter B which is related to activation energy was found equal to 828-1115 K. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (Lithuanian)
  Group: Ab
  Data: Kambario temperatūros joninis skystis (RTIL) 1-butil-3-metilimidazolio tetrafluoroboratas ([bmim] [BF4 ]) buvo tirtas 288-338 K temperatūrų intervale naudojant 1 H, 19F, 11B ir 10B DOSY (Diffusion Ordered Spectroscopy) branduolių magnetinio rezonanso (BMR) spektroskopiją. Nustatyta, kad [BF4 ] anijono ir [bmim] katijono dinamika yra palyginama, todėl galima teigti, jog RTIL dinamika yra vienoda tirtame temperatūrų intervale. Difuzijos koeficientai kito nuo 6,9 ∙ 10-11 m²/s esant aukščiausiai temperatūrai iki 6,1∙10-12 m-2/s esant žemiausiai temperatūrai. Nustatyta, kad difuzijos koeficiento temperatūrinė priklausomybė neatitinka Arenijaus dėsnio, todėl ji buvo analizuota naudojant Vogelio-Fulcherio-Tammanno (VFT) lygtį difuzijos procesui aprašyti. Tirtajam RTIL stiklėjimo temperatūra nustatyta 172-181 K intervale; ši vertė sutampa su reikšmėmis, gautomis kitais metodais ir pateikiamomis literatūroje. Parametras B, susijęs su aktyvacijos energija, nustatytas lygus 828-1115 K. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Lithuanian Journal of Physics is the property of Lithuanian Academy of Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.3952/physics.2026.66.2.1
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        Text: English
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        PageCount: 6
        StartPage: 69
    Subjects:
      – SubjectFull: Diffusion coefficients
        Type: general
      – SubjectFull: Arrhenius equation
        Type: general
      – SubjectFull: Glass transition temperature
        Type: general
      – SubjectFull: Ionic liquids
        Type: general
      – SubjectFull: Nuclear magnetic resonance spectroscopy
        Type: general
    Titles:
      – TitleFull: NON-ARRHENIUS BEHAVIOUR OF NMR SELF-DIFFUSION OF THE NEAT ROOM TEMPERATURE IONIC LIQUID 1-BUTYL-3- METHYL IMIDAZOLIUM TETRAFLUOROBORATE [BMIM][BF4].
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              Text: 2026
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