小中大另1450左右的峰不能简单认为是L酸,1450以下为羟基吸附的吡啶,1450以上为L酸,有的样品1450附近能明显看下两个峰。
峰的归属以下两篇文献有详细叙述。
Parry, E. P., An infrared study of pyridine adsorbed on acidic solids. Characterization of surface acidity. Journal of Catalysis 1963, 2, (5), 371-379.
Corma, A., Inorganic Solid Acids and Their Use in Acid-Catalyzed Hydrocarbon Reactions. Chemical Reviews 1995, 95, (3), 559-614.