Gibbs Free Energy of Transfer of a Methylene Group in Buffer + Ionic Liquid Biphasic Systems Export

@article{citeulike:2860829, abstract = {Abstract: Partitioning experiments for a series of dinitrophenylated (DNP) amino-acids have been conducted in three (ionic liquid + sodium phosphate buffer) biphasic systems at 23 °C. The ionic liquids used were 1-hexyl-3-methylimidazolium tetrafluoroborate ([C6mim][BF4]), 1-octyl-3-methylimidazolium tetrafluoroborate ([C8mim][BF4]), and 1-decyl-3-methylimidazolium tetrafluoroborate ([C10mim][BF4]). The pH of the initial aqueous solution has been fixed at 7.4, using a sodium phosphate buffer. DNPamino acids distribute preferentially to the ionic liquid phase, and this partition increases with the length of the alkyl chain of the amino acid. The Gibbs free energy of transfer for a methylene group is calculated from the partition coefficients of the solutes. This provides a measurement for the relative hydrophobicity of the conjugated phases, and the obtained values are compared to those of other biphasic systems used in biotechnology (e.g., polymerpolymer and polymersalt aqueous two-phase systems).}, address = {Laboratory of Separation and Reaction Engineering, Dpt. of Chemical Engineering, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, s/n 4200-465 Porto, Portugal}, author = {Rodr\'{\i}guez, Oscar and Madeira, Pedro P. and Macedo, Eug\'{e}nia A.}, citeulike-article-id = {2860829}, citeulike-linkout-0 = {http://dx.doi.org/10.1021/ie0714293}, citeulike-linkout-1 = {http://pubs.acs.org/doi/abs/10.1021/ie0714293}, day = {17}, doi = {10.1021/ie0714293}, journal = {Ind. Eng. Chem. Res.}, keywords = {biphasic, buffer, gibbs, ionic, liquid, rtil, transfer}, month = {May}, posted-at = {2008-06-04 12:24:53}, priority = {3}, title = {Gibbs Free Energy of Transfer of a Methylene Group in Buffer + Ionic Liquid Biphasic Systems}, url = {http://dx.doi.org/10.1021/ie0714293}, year = {2008} }

TY - JOUR ID - citeulike:2860829 L3 - citeulike-article-id:2860829 N2 - Abstract: Partitioning experiments for a series of dinitrophenylated (DNP) amino-acids have been conducted in three (ionic liquid + sodium phosphate buffer) biphasic systems at 23 °C. The ionic liquids used were 1-hexyl-3-methylimidazolium tetrafluoroborate ([C6mim][BF4]), 1-octyl-3-methylimidazolium tetrafluoroborate ([C8mim][BF4]), and 1-decyl-3-methylimidazolium tetrafluoroborate ([C10mim][BF4]). The pH of the initial aqueous solution has been fixed at 7.4, using a sodium phosphate buffer. DNPamino acids distribute preferentially to the ionic liquid phase, and this partition increases with the length of the alkyl chain of the amino acid. The Gibbs free energy of transfer for a methylene group is calculated from the partition coefficients of the solutes. This provides a measurement for the relative hydrophobicity of the conjugated phases, and the obtained values are compared to those of other biphasic systems used in biotechnology (e.g., polymerpolymer and polymersalt aqueous two-phase systems). JF - Ind. Eng. Chem. Res. AD - Laboratory of Separation and Reaction Engineering, Dpt. of Chemical Engineering, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, s/n 4200-465 Porto, Portugal TI - Gibbs Free Energy of Transfer of a Methylene Group in Buffer + Ionic Liquid Biphasic Systems KW - biphasic KW - buffer KW - gibbs KW - ionic KW - liquid KW - rtil KW - transfer AU - Rodríguez, Oscar AU - Madeira, Pedro AU - Macedo, Eugénia PY - 2008/05/17/ UR - http://dx.doi.org/10.1021/ie0714293 ER -