Brünig Thorge, Krekić Kristijan, Bruhn Clemens, Pietschnig Rudolf
Universität Kassel, Institut für Chemie und CINSaT, Heinrich-Plett-Strasse 40, 34132, Kassel, Germany.
Chemistry. 2016 Nov 2;22(45):16200-16212. doi: 10.1002/chem.201602723. Epub 2016 Sep 20.
The thermal properties of a series of twenty-four ionic liquids (ILs) have been determined by isothermal titration calorimetry (ITC) with the aim of simulating processes involving water sorption. For eleven water-free ILs, the molecular structures have been determined by X-ray crystallography in the solid state, which have been used to derive the molecular volumes of the ionic components of the ILs. Moreover, the structures reveal a high prevalence of hydrogen bonding in these compounds. A relationship between the molecular volumes and the experimentally determined energies of dilution could be established. The highest energies of dilution observed in this series were obtained for the acetate-based ILs, which underlines their potential as working fluids in sorption-based thermal energy storage systems.
为了模拟涉及水吸附的过程，通过等温滴定量热法（ITC）测定了一系列24种离子液体（ILs）的热性质。对于11种无水离子液体，通过X射线晶体学确定了其固态分子结构，这些结构被用于推导离子液体离子成分的分子体积。此外，结构表明这些化合物中普遍存在氢键。可以建立分子体积与实验测定的稀释能之间的关系。该系列中观察到的最高稀释能是基于醋酸盐的离子液体所具有的，这突出了它们作为基于吸附的热能存储系统中工作流体的潜力。
