Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa , Apartado 127, 2780-157 Oeiras, Portugal.
J Phys Chem B. 2013 Sep 19;117(37):10826-33. doi: 10.1021/jp402300c. Epub 2013 Sep 4.
The study of solid-fluid transitions in fluorinated ionic liquids using differential scanning calorimetry, rheology, and molecular modeling techniques is an essential step toward the understanding of their dynamics and the thermodynamics and the development of potential applications. Two fluorinated ionic liquids were studied: 1-hexyl-3-methylimidazolium perfluorobutanesulfonate, HMIm(PFBu)SO3, and tetrabutylammonium perfluorobutanesulfonate, NB4(PFBu)SO3. The experimental calorimetric and rheological data were analyzed taking into account the possible mesoscale structure of the two fluorinated ionic liquids. The simulation results indicate the possible formation of three nanosegregated domains-polar, nonpolar, and fluorous-that may have a profound impact on ionic liquid research. In the case of HMIm (PFBu)SO3 the three types of mesoscopic domains can act as interchangeable jigsaw pieces enabling the formation of multiple types of crystals and inducing the observed calorimetry and rheological trends.
使用差示扫描量热法、流变学和分子建模技术研究氟化离子液体中的固-液转变是理解其动力学、热力学和开发潜在应用的重要步骤。研究了两种氟化离子液体：1-己基-3-甲基咪唑六氟丁基磺酸盐（HMIm（PFBu）SO3）和四丁基铵六氟丁基磺酸盐（NB4（PFBu）SO3）。考虑到两种氟化离子液体可能的介观结构，对实验量热学和流变学数据进行了分析。模拟结果表明，可能形成三个纳米分隔的域-极性、非极性和氟代-这可能对离子液体研究产生深远影响。在 HMIm（PFBu）SO3 的情况下，这三种类型的介观域可以作为可互换的拼图块，从而形成多种类型的晶体，并导致观察到的量热学和流变学趋势。
