ACIDITY OF SURFACE HYDROXYL GROUPS
ACIDITY OF SURFACE HYDROXYL GROUPS
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DOI：
10.1021/j100696a016
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发表时间：
1970-01-01
影响因子：
--
通讯作者：
HERTL, W
中科院分区：
文献类型：
--
作者：
HAIR, ML;HERTL, W
关于溶液中酚的羟基带频率偏移的报告表明，偏移量可能与溶剂的碱性和苯酚的酸性有关。利用这一概念，测量了在几种氧化物表面的羟基上吸附期间观察到的频移，并将其与几种醇溶解在相同溶剂中时观察到的频移进行了比较。将这些位移与已知的醇酸度常数进行比较，可以获得各种表面羟基的 p 值。测得的值为：氧化镁，15.5；博里亚，8.8；二氧化硅，7.1；二氧化硅-氧化铝，7.1；和磷，-0.4。
Reports of hydroxyl band frequency shifts of phenols in solution indicate that the amount of shift can be related to the basicity of the solvent and the acidity of the phenol. Using this concept, the frequency shifts observed during adsorption on the hydroxyl groups of several oxide surfaces have been measured and compared with the shifts observed when several alcohols are dissolved in the same solvents. Comparison of these shifts with the known acidity constants of the alcohols enables p values for the various surface hydroxyl groups to be obtained. The values found were: magnesia, 15.5; boria, 8.8; silica, 7.1; silica-alumina, 7.1; and phosphorus,-0.4.