水与受质子溶剂氢键作用的IR研究  

IR STUDY OF THE INTERACTION OF WATER WITH PROTON-ACCEPTING SOLVENTS

作　　者：吴雄武 陈智[1] 滕藤[1] 宁永成[2] 

机构地区：[1]清华大学化学工程系 [2]清华大学化学系

出　　处：《物理化学学报》1990年第2期215-219,共5页Acta Physico-Chimica Sinica

摘　　要：一般认为,水与受质子溶剂通过氢键作用形成1:1和1:2缔合物: H_2O+S?H_2O.S (1) H_2O.S+S?H_2O._2S (2)文献报道了通过NMR和IR光谱等方法求得的各种有机溶剂与水作用的K_(11)和K_(12)值.S.O.Paul等观察了水在受质子溶剂中的IR谱图,将OH伸缩振动区域的吸收峰分解为四个峰并分别指定为1:1和对称1:2缔合物中水的吸收峰.对于二氧六环,四个峰位置分别为:Ⅰ.3653cm^(-1);Ⅱ.3622cm^(-1);Ⅲ.3580cm^(-1);Ⅳ.3509cm^(-1),指定峰Ⅰ、Ⅳ分别为1:1缔合物的非氢键合和氢键合OH伸缩振动吸收,峰Ⅱ。The interaction of water with solvents in H_2O-TBP-CCl_4 system and H_2O-p-dio-xan-CCl_4 system is studied with IR method. The absorbances of free water, 1:1 and1:2 complex are observed and the absorbance frequencies of each species are assign-ed. In H_2O-TBP-CCl_4 system, there exists not only symmetric 1:2 complex butalso unsymmetric one. The water molecule in unsymmetric 1:2 complex is consideredto be hydrogen bonded with two kinds of oxygen atom in TBP. And the hydrogenbonds are different in strenghth. Because of different spatial configurations of sol-vent molecules around water, more than one kind of 1:2 complex exist in H_2O-p-dioxan-CCl_4 system.

关 键 词：水 受质子溶剂 氢键 红外光谱 

分 类 号：O641.2[理学—物理化学]