摘要
对乙醇-水缔合的光谱行为进行了系统的研究,发现了游离态乙醇在915nm处有一最大吸收峰,缔合态乙醇、水在1015nm,975nm处各有一最大吸收峰,确定了吸收峰是由于υO-H的二级倍频所致,并揭示了醇水间氢键缔合程度与其峰位、吸收强度间的变化规律.其结果为揭示乙醇、水氢键缔合作用机理、白酒的陈化过程等提供了理论及实验依据,并为乙醇含量测定开辟了一条新途径。
The absorption spectra of associated ethanol-water system was systematically studied in this paper.It was found that the free ethanol had a maximum absorption peak at915nm and the absorption peaks of associated ethanol and water are at1015nm?975nm,respectively.The founding proved the formation of absorption peak is caused by second-harmonic peak ofυ O-H ,revealed the relation between associated degree of hydrogen bonds and its peak position,absorptive intensity.The result provided the basic theory to explain the association mechanism of hydrogen-bonding in ethanol-water system and liquor aging theoretically and practically.A new method to determine the ethanol content is also built.
出处
《酿酒科技》
2004年第3期83-84,共2页
Liquor-Making Science & Technology
基金
山西省自然科学基金项目(20001011)
山西省科技攻关课题(021171)。
关键词
氢键缔合
光谱行为
乙醇
水
hydrogen-bonding association
action of spectrum
ethanol
water
