Imidazolium Based Ionic Liquids: Impact of the Cation Symmetry and Alkyl Chain Length on the Enthalpy of Vaporization. Issue 1 (8th November 2016)

• Record Type: Journal Article
• Authors: Yermalayeu, Andrei V.; Zaitsau, Dzmitry H.; Loor, Manuel; Schaumann, Julian; Emel'yanenko, Vladimir N.; Schulz, Stephan; Verevkin, Sergey P.
• Other Names: Feldmann Claus guestEditor.; Ruck Michael guestEditor.
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 643:Issue 1(2017)
• Page Start: 81
• Page End: 86
• Publication Date: 2016-11-08
• Subjects: Ionic liquids; Enthalpy of vaporization; Thermogravimetry; Quartz‐crystal microbalance; Quantum chemical calculations; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201600332
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract : The vaporization thermodynamics of symmetric imidazolium based ionic liquids of the general formula [C n C n Im][Br] with the chains length n = 4, 5, 6, and 8 were investigated using a combination of DSC, TGA, and QCM methods with quantum chemical calculations. Comparison of vaporization enthalpies for the symmetric ([C n C n Im][Br]) and asymmetric imidazolium based ILs ([C n mim][Br]) revealed a general trend with the lower vaporization enthalpies of the symmetric species indicating a significant decrease of the Coulombic interactions affecting energetics of vaporization. Abstract :