摘要
采用衰减全反射-傅里叶红外光谱法研究了丙酮和水分子间的相互作用。发现随着丙酮水溶液浓度的减小,丙酮CH3键的对称（3538cm^-1）和不对称伸缩振动（3441cm^-1）吸收峰位置波数减小方向迁徙,CO伸缩振动吸收（1713cm^-1）向波数减小方向移动,丙酮浓度为20%时,迁徒至1691cm^-1,减小了约19cm^-1;同时1647cm^-1处的吸收则迁徙至1626cm^-1。由此说明丙酮与水分子间形成了氢键,而且氢键的强弱与丙酮水溶液的浓度有关。当磁场作用于丙酮水溶液时红外光谱发生了明显改变,在600～4000cm^-1范围内,各吸收峰强度随磁场作用时间的增长由不同程度的增加;水分子OH伸缩振动吸收（3388cm^-1）向波数减小的方向迁徒。这一结果则说明磁场作用能够增强丙酮与水分子间的氢键相互作用。
In this paper,attenuated total reflectance infrared spectroscopy is used to study the interaction of acetone and water molecules.Experiments show that：when the concentration of acetone is decreased from 100% to 20%,the absorbance bands at 3538cm^-1 and 3441cm^-1 of CH3 is redshifted,the absorbance band at 1713cm^-1 and 1647cm^-1 of CO is redshifted about 19 cm^-1 and 21cm^-1 respectively.The results show the hydrogen bonding is formed between acetone and water molecules and the strength of hydrogen bonging is related to the concentration of acetone.Meanwhile,when mixture of water and acetone is processed by magnetic field of 4000G,it is found that in range of 600 to 4000cm^-1,not the absorbance of spectra is increasing with the processd time,but the absorbance band of OH is redshifted from 3388 cm^-1.The results show the magnetic field can affect the strength of hydrogen bonding between acetone and water molecules.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第5期451-453,461,共4页
Laser & Infrared
基金
国家863项目(No.2006AA0224C3)资助
关键词
丙酮
水
红外光谱
氢键
磁场
acetone
water
infrared spectroscopy
hydrogen bonding
magnetic field
