丙酮红外光谱的溶剂效应  

Solvent Effects on Infrared Spectra of Acetone

作　　者：王小燕[1] 陈映[1] 

机构地区：[1]温州大学应用技术学院,浙江温州325035

出　　处：《温州大学学报》2004年第1期26-30,共5页

基　　金：温州大学科研基金项目(X03009);浙江省教育厅科研项目(20030540)

摘　　要：报道在20种极性或非极性溶剂中丙酮的红外光谱,研究溶质-溶剂之间相互作用.将红外谱带位移分别与溶剂参数诸如溶剂接受数AN等进行相关分析.结果表明:丙酮羰基在甲醇溶剂中红外诱导伸缩频率位移最大.一些丙酮与甲醇分子之间形成具有非线性氢键结合的六元环结构.丙酮的羰基伸缩振动频率与溶剂接受数AN值、线性溶剂自由能关系LSER均存在良好的相关性,且与LSER值的相关性更佳.在物理意义上LSER较好地解释了溶剂诱导伸缩频率位移.Infrared spectroscopy studied of acetone as a dilute solute are reported for 20 pure organic solvents, both polar and non-polar. They are undertaken to investigate the solvent-solute interactions and to correlate solvent properties such as the solvent acceptor number (AN) and the linear solvation energy relationships (LSER), respectively, with the infrared band shifts. The largest solvent induced frequency shift in the infrared spectrum of acetone is seen in the methanol. Some of the acetone and methanol molecules are formed with such a complex possessed a six-membered ring-like structure involving non-linear hydrogen bond. The carbonyl stretching frequencies of acetone show strong correlations with solvent parameters such as solvent acceptor number (AN) and the linear solvation energy relationships (LSER). And these frequencies exhibit a better correlation with the LSER than the AN. It is discussed that LSER is a good explanation of solvent-induced stretching frequency shifts physically.

关 键 词：傅立叶变换红外光谱 溶剂效应 相关分析 丙酮 

分 类 号：O657.33[理学—分析化学]