کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1252811 1496042 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
New dicationic piperidinium hexafluorophosphate ILs, synthesis, characterization and dielectric measurements
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
New dicationic piperidinium hexafluorophosphate ILs, synthesis, characterization and dielectric measurements
چکیده انگلیسی

A new class of dicationic ionic liquids (ILs) were synthesized for electrochemical applications at high temperatures. The syntheses are based on a dialkylation reaction of N-alkylpiperidine followed by anion exchange. The structures of ILs, based on piperidinium combined with hexafluorophosphate anion, were identified by using 1H, 13C, 19F, 31P NMR and FT-IR spectroscopy. ILs’ thermal properties were investigated in the temperature range from −50 to 350 °C by using differential scanning calorimetry (DSC). In the frequency of 10−2–106 Hz range, dielectric measurements were performed on ILs’ samples at various temperatures from −80 to 20 °C, i.e. around the glass transition temperature. The peak relaxation was observed near to this temperature. Also, the conductivity was investigated and the energy activation determined. The temperature dependence of the relaxation times was shown to be governed by the Arrhenius equation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Arabian Journal of Chemistry - Volume 7, Issue 5, November 2014, Pages 781–787
نویسندگان
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