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作者

Zhu, Y Pang, XH Yu, L

作者单位

Taishan Med Univ, Dept Chem & Chem Engn, Tai An 271016, Shandong, Peoples R China   增强组织信息的名称     Taishan Medical University Shandong Univ, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China   增强组织信息的名称     Shandong University

刊名

ACTA PHYSICO-CHIMICA SINICA

年份

2010

卷号

Vol.26 No.8

页码

2103-2108

ISSN

1000-6818

关键词

Amino acid DMA DMF Diol Solute-solute interaction

摘要

The enthalpies of mixing for model protein compounds (glycine, alanine, N,N-dimethyl formamide (DMF) and N,N-dimethyl acetamide (DMA)) with diols (1, 3-butanediol and 2, 3-butanediol) and their respective enthalpies of dilution in aqueous solutions at 310.15 K were determined by flow microcalorimetric measurements. Heterotactic enthalpic interaction coefficients (h(xy), h(xxy), h(xyy)) were obtained by analyzing these experimental results according to McMillan. Mayer theory. The results indicate...更多

The enthalpies of mixing for model protein compounds (glycine, alanine, N,N-dimethyl formamide (DMF) and N,N-dimethyl acetamide (DMA)) with diols (1, 3-butanediol and 2, 3-butanediol) and their respective enthalpies of dilution in aqueous solutions at 310.15 K were determined by flow microcalorimetric measurements. Heterotactic enthalpic interaction coefficients (h(xy), h(xxy), h(xyy)) were obtained by analyzing these experimental results according to McMillan. Mayer theory. The results indicated that the h(xy) values were all positive with a dominant endothermic effect and the coefficients decreased according to the order of h(xy)(DMA)>h(xy)(Ala)>h(xy)(Gly)>h(xy)(DMF) and h(xy)(2,3-butanediol)>h(xy)(1,3-butanediol). Based on these results, we discussed solute-solute and solute-solvent interactions with regards to the influence of the relative position of the diol functional groups on the value of h(xy). We found that the hydrogen bonds between DMF or DMA and the diols were strong, and because of the good polarizability of DMF\'s resonance structure, hydrogen bonds between DMF and the diols were further strengthened.收起

学科

【SCI学科】CHEMISTRY, PHYSICAL 【ESI学科】CHEMISTRY

影响因子

2016年:0.767;2015年:0.844;2014年:0.852;2013年:0.886;2012年:0.869

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期刊

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