01292nas a2200157   4500008004100000022001400041245011000055210006900165260007300234300001200307490000800319520064800327100001900975700001600994856012401010       2010                        eng d  a0009-261400aReversal from endothermic to exothermic behavior of imidazolium-based ionic liquids in molecular solvents0 aReversal from endothermic to exothermic behavior of imidazoliumb  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a143-1470 v4963 a<p>In this communication, we present an interesting reversal in the enthalpic behavior from endothermic to exothermic on increasing the carbon chain length attached to the imidazolium ring in the imidazolium-based ionic liquids. A systematic investigation is presented on the excess partial molar enthalpy, H(IL)(E) directly measured using isothermal titration calorimeter at 298.15 K for the interactions operating between cation and anion of four imidazolium ionic liquids with aqueous and various non-aqueous solvents. This reversal behavior is analyzed in terms of hydrophobic and solvation effects. (C) 2010 Published by Elsevier B.V.</p>1 aRai, Gitanjali1 aKumar, Anil  uhttps://library.ncl.res.in/content/reversal-endothermic-exothermic-behavior-imidazolium-based-ionic-liquids-molecular-0