Kruk Danuta, Jancelewicz Mariusz, Klimaszyk Adam, Markiewicz Roksana, Fojud Zbigniew, Jurga Stefan
Department of Physics and Biophysics, University of Warmia & Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland.
NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland.
Materials (Basel). 2021 Dec 28;15(1):216. doi: 10.3390/ma15010216.
H and F spin-lattice relaxation experiments have been performed for a series of ionic liquids sharing the same anion: bis(trifluoromethanesulfonyl)imide but including cations of different alkyl chain lengths: butyltriethylammonium, triethyloctylammonium, dodecyltriethylammo-nium and hexadecyltriethylammonium. The studies have been carried out in the temperature range from 383 to 108 K at the resonance frequency of 200 MHz (for H). A quantitative analysis of the relaxation data has revealed two dynamical processes for both kinds of ions. The dynamics have been successfully modeled in terms of the Arrhenius law. The timescales of the dynamical processes and their temperature evolution have been discussed in detail, depending on the structure of the cation.
双（三氟甲磺酰）亚胺，但包含不同烷基链长度阳离子的离子液体，开展了氢（H）和氟（F）自旋晶格弛豫实验，这些阳离子包括丁基三乙铵、三乙基辛基铵、十二烷基三乙铵和十六烷基三乙铵。研究在383至108 K的温度范围内，以200 MHz（针对氢）的共振频率进行。对弛豫数据的定量分析揭示了两种离子的两个动力学过程。这些动力学过程已根据阿伦尼乌斯定律成功建模。根据阳离子的结构，详细讨论了动力学过程的时间尺度及其温度演变。
