Heterotactic Enthalpic Interactions of L-Arginine with 2,2,2-Trifluoroethanoi in Aqueous Solutions at 298.15,303.15 and 310.15 K |
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| Authors: | ZHU Yan PANG Xian-hong YU Li |
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| Affiliation: | 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 |
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| Abstract: | The enthalpies of mixing of L-arginine with 2,2,2-trifluoroethanol and their respective enthalpies of dilution 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 coefficients(hxy,hxxy,hxyy)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. |
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| Keywords: | L-Arginine 2,2,2-Trifluoroethanol Solute-slute interaction Heterotactic enthalpic interaction |
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