中文摘要：

为了研究不同浓度的乙醇-水溶液的缔合状态,采用1HNMR对其氢键缔合展开分析.发现：溶液中弱氢键C H…O随浓度变化的幅度较小,其中CH2比CH3更易形成弱氢键,也更易受浓度波动的影响;至于强氢键O H…C,乙醇分子OH比水分子更易受浓度变化的影响,溶液在乙醇摩尔分数x=0.550时出现最强的氢键缔合网络结构.根据缔合强度大小把溶液浓度范围大致分为3个区间：0〈x〈0.236时,水分子缔合结构占主要地位;0.236≤x≤0.735时,乙醇分子和水分子相互作用,形成更强、更广的氢键缔合网络结构;0.735〈x〈1.000时,乙醇分子缔合结构占据主要地位.

英文摘要：

This paper deals with the interaction between hydrogen bond association and ethanol content in ethanol-water solution by means of 1H NMR.The results show that（1）the weak hydrogen bond CH…O slightly changes with ethanol concentration;（2）CH2 is easier to form weak hydrogen bond and is more sensitive to ethanol concentration than—CH3;and（3） as for the strong hydrogen bond OH…O,OH groups in ethanol molecule are more sensitive to the concentration than water,and the strongest hydrogen bond association occurs at a mole fraction of ethanol（x） of 0.550.Furthermore,according to the association strength of hydrogen bond,the ethanol concentration can be approximately divided into three regions,namely,0x0.236,0.236≤x≤0.735 and 0.735x1.000.In the first region,there is a leading association in water molecule,while in the third region,there is a leading association in ethanol molecule,and,in the second region,the strongest and the widest hydrogen bond association net is formed by the interaction of ethanol and water molecules.