用固体~1H MAS NMR研究水在不同吸附质中的状态  

STUDIES ON THE WATER STATE IN DIFFERENT ADSORBENT MATERIALS BY SOLID STATE ~1H MAS NMR SPECTROSCOPY

作　　者：赵晓东[1] 孙平川[1] 马建标[1] 

机构地区：[1]南开大学高分子化学研究所,吸附分离功能高分子材料国家重点实验室,天津300071

出　　处：《离子交换与吸附》2001年第5期324-328,共5页Ion Exchange and Adsorption

基　　金：国家自然科学基金(59773021)

摘　　要：应用固体1H MAS NMR实验技术,根据核磁共振峰线宽的不同,表征了水在不同吸附质中的微观状态。在含水的壳聚糖和明胶中,以氢键形式存在的水的共振峰线宽为2000Hz左右。在含水分子筛和含水硅胶中存在的吸附水的共振峰线宽在1000Hz左右。而自由水的核磁共振峰线宽小于3Hz。By using solid state 1H NMR technology, water states on different adsorbent materials in micromolecular level are characterized by the difference of their 1H MAS NMR line width. The line width of the proton signal of water which is bounded in terms of hydrogen bounds is about 2kHz in Chitosan-like biomaterials. In zeolites and silicon gels, the line width of adsorbed water is about 1kHz, the linewidth of free water is just less than 3Hz.

关 键 词：^1HMSANMR 线宽 水 微观状态 吸附 吸附剂 壳聚糖 明胶 氢键 核磁共振 共振峰 

分 类 号：O647.3[理学—物理化学]