Molecular interactions of L-Histidine in aqueous ionic liquid [C4mim][BF4] solution at different temperatures: Volumetric, acoustic and viscometric approach

Abstract Experimentally measured density (ρ), viscosity (η) and speed of sound (u) for L-Histidine in aqueous ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim][BF4]) solutions at different temperatures ranging (293.15–318.15) K has been used to determine various volumetric, viscometric and compressibility parameters, i.e. apparent molar properties (VΦ, KΦ, s), limiting apparent molar properties ( V o Φ , K o Φ , s ), transfer properties ( V o Φ , tr , K o Φ , s , tr , Btr), hydration number (nH). Viscosity coefficients A and B have been computed to investigate the precious information about the complicated phenomenon undergoing between ionic liquid [C4mim][BF4] and the head/side chain cluster of amino acid. Based on co-sphere overlap model variety of intermolecular interactions prevailing in the ternary solutions and using Hepler's constant and temperature derivative of B-coefficients (dB/dT) the structure making/breaking nature of solute have been investigated.