Thermophysical Properties of Amino Acid-Based Ionic Liquids (original) (raw)

Ionic liquids (ILs) having either cations or anions derived from naturally occurring amino acids have been synthesized and characterized as amino acid-based ionic liquids (AAILs). In this work, the experimental measurements of the temperature dependence of density, viscosity, heat capacity, and thermal conductivity of several AAILs, namely, tributylmethylammonium serinate [N 4441 ][Ser]), tributylmethylammonium taurinate ([N 4441 ][Tau]), tributylmethylammonium lysinate ([N 4441 ][Lys]), tributylmethylammonium threonate ([N 4441 ][Thr]), tetrabutylphosphonium serinate ([P 4444 ][Ser]), tetrabutylphosphonium taurinate ([P 4444 ][Tau]), tetrabutylphosphonium lysinate ([P 4444 ][Lys]), tetrabutylphosphonium threonate ([P 4444 ][Thr]), tetrabutylphosphonium prolinate ([P 4444 ][Pro]), tetrabutylphosphonium valinate ([P 4444 ][Val]), and tetrabutylphosphonium cysteinate ([P 4444 ][Cys]