Heterotactic Enthalpic Interactions of L-Arginine with 2,2,2-Trifluoroethanol in Aqueous Solutions at 298.15, 303.15 and 310.15 K  

作　　者：ZHU Yan PANG Xian-hong YU Li 

机构地区：[1]Department of Chemistry and Chemical Engineering, Taishan Medical University, Tai ＇an 271016, P. R. China [2]Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, P. R, China

出　　处：《Chemical Research in Chinese Universities》2011年第1期123-126,共4页高等学校化学研究（英文版）

基　　金：Supported by the Natural Scientific Foundation of Shandong Province, China(NoZ2007B03);the Doctoral Fund of the Ministry of Education of China(New Teachers Fund)(No070422047)

摘　　要：The enthalpies of mixing of L-arginine with 2,2,2-trifluoroethanol and their respective enthalpies of dilu- tion in aqueous solutions at 298.15, 303.15 and 310.15 K were determined as a function of the mole fraction by flow microcalorimetric measurement. These experimental results were analyzed to obtain heterotactic enthalpic interaction coeffieients（hxy , hxy , hxy） according to the McMillan-Mayer theory. The hxy coefficients between L-arginine molecule studied and 2,2,2-trifluoroethanol molecule in aqueous solutions at 298.15, 303.15 and 310.15 K were found to be all negative. The results were discussed in terms of solute-solute interaction and solute-solvent interaction.The enthalpies of mixing of L-arginine with 2,2,2-trifluoroethanol and their respective enthalpies of dilu- tion in aqueous solutions at 298.15, 303.15 and 310.15 K were determined as a function of the mole fraction by flow microcalorimetric measurement. These experimental results were analyzed to obtain heterotactic enthalpic interaction coeffieients（hxy , hxy , hxy） according to the McMillan-Mayer theory. The hxy coefficients between L-arginine molecule studied and 2,2,2-trifluoroethanol molecule in aqueous solutions at 298.15, 303.15 and 310.15 K were found to be all negative. The results were discussed in terms of solute-solute interaction and solute-solvent interaction.

关 键 词：L-ARGININE 2 2 2-Trifluoroetbanol Solute-solute interaction Heterotactic enthalpic interaction 

分 类 号：O645.164[理学—物理化学] TQ223.122[理学—化学]