水溶液中六种氨基酸与两种酰胺的焓相互作用的研究The Study of the Enthalpic Interactions between Six kinds of Amino Acid and Two Acid Amides in Aqueous Solutions at 310.15K
杨艳,赵燕,孙海涛,张洪琳
摘要(Abstract)：
用2277热活性检测仪测定了310.15 K下,甘氨酸、L-丙氨酸、L-缬氨酸、L-丝氨酸、L-苏氨酸和L-脯氨酸6种α-氨基酸分别与N-甲基乙酰胺、N,N-二甲基乙酰胺分子在水溶液中的混合过程的焓变,根据McMillan-Mayer理论得到了各级焓对作用系数,并比较了各级焓对作用系数.结果表明,氨基酸与N,N-二甲基乙酰胺的焓对作用系数大于与N-甲基乙酰胺的焓对作用系数.由于N,N-二甲基乙酰胺中—CH3基团的增加,对丝氨酸的焓对作用系数改变较大.用溶质-溶质相互作用和溶质-溶剂相互作用理论对结果进行了解释.
关键词(KeyWords)： α-氨基酸;N-甲基乙酰胺;N,N-二甲基乙酰胺;异系焓作用
基金项目(Foundation):
作者(Author): 杨艳,赵燕,孙海涛,张洪琳
DOI: 10.16393/j.cnki.37-1436/z.2006.02.018
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