【摘要】 利用拉曼和全反射红外光谱法研究了四氢呋喃-水体系分子间氢键随着水含量增加的变化。对于单一四氢呋喃组分，分子间氢键存在于C—H键与C—O键之间；随着水含量的增加，四氢呋喃分子间氢键逐渐被四氢呋喃-水分子间氢键取代，C—O键的红外高频位移证明了这一过程。当水含量达到4.6%(体积分数)左右时，C—C—C—C环呼吸振动峰随水含量变化曲线出现转折点，该点组分中四氢呋喃和水的含量与共沸物基本一致，由此可见少量水对四氢呋喃物理性能的影响主要基于两者之间氢键作用方式的变化。更多还原

【Abstract】 The intermolecular hydrogen bonds in THF-H₂O mixture were studied by Raman and ATR-FTIR. For THF component, the intermolecular hydrogen bond exists between C—H bond and C—O bond. With H₂O adding, the intermolecular hydrogen bond C—O…H—C between THF was gradually replaced by O—H…O—C between THF and H₂O, which was proved by the infrared high-frequency shift of C—O bond. When H₂O content reaches about 4.6%（volume fraction）, the curve C—C—C—C—C ring vibration peak vs water content appears a turning point, and the contents of THF and water at this point are basically the same as those in the azeotrope. It can be resulted that the influence of a small amount of water on the physical properties of THF is mainly based on the change of hydrogen bond interaction between them.更多还原