苯基磺酸官能化中孔硅基材料催化环己酮Aldol缩合反应

2-(1环-己烯基)环己酮是一种植物防腐杀菌剂,作为制备柑桔类水果的保鲜剂、分散染料染色的载体物质邻苯基苯酚(Ortho-phenylphenol,OPP)的原料而备受重视。其与环己叉基环己酮互为同分异构体,均由环己酮A ldol缩合反应合成,该过程是包括醇醛缩合、脱水在内的亲核加成-消除反应,

Catalytic performance of phenylsulfonic acid functionalized mesoporous silica on aldol condensation of cyclohexanone

Mesoporous silica functionalized with phenylsulfonic acid is prepared by sol-gel technique to form a precursor bearing phenyl groups followed by sulfonation.The characterization of nitrogen adsorption-desorption indicates that the specific area of the material is 722 m2/g,the average pore size is 9.06 nm and pore volume is 0.59 cm3/g.The material is examined as acid catalyst in aldol condensation reaction of cyclohexanone.The results show that the material featured higher catalytic performance than those of conventional concentrated sulfuric acid and p-toluene sulfonic acid,and it is found that the main factors which determine the catalytic activity of the mesoporous silica functionalized with phenylsulfonic acid involve its acid center,surface property,and porosity structure.