摘要
利用聚卟啉金属钴配合物[PCo(Ⅱ)TPP]在一定条件下催化分子氧氧化苯乙烯,氧化产物以苯甲醛(1)和1,2-环氧苯乙烷(2)为主,比较了小分子钴卟啉配合物TPPCo(Ⅱ)和PCo(Ⅱ)TPP,发现PCo(Ⅱ)TPP具有更高的催化活性,考察了影响氧化反应的反应温度、反应时间、溶剂和重复使用性等因素。结果表明,较为理想的反应温度和时间为90℃和9 h,非极性的溶剂1,4-二氧六环能提高苯乙烯的转化率和产物选择性,而且催化剂PCo(Ⅱ)-TPP在重复使用5次后催化活性没有明显的下降。
Styrene oxidation using polymeric metalloporphyrin complexes [ PCo （ Ⅱ ）TPP] catalyst in the presence of molecular oxygen were studied. The benzaldhyde （ 1 ） and styrene oxide （2） were obtained as the major products. Compared with the cobalt porphyrin complex TPPCo （ Ⅱ ） and PCo （ Ⅱ）TPP, the PCo（ Ⅱ）TPP has the higher catalytic activity, the effect of reaction temperature, reaction time, solvents and reusability on the oxidation were also investigated. The results showed that the conversion and selectivity to styrene were improved under reaction temperature at 90 ℃, reaction time at 9 h and unpolar solvent （1,4-dioxane） was added to reaction system. Furthermore,the catalyst PCo（ Ⅱ）TPP could be efficiently reused five times.
出处
《应用化工》
CAS
CSCD
2013年第4期706-709,共4页
Applied Chemical Industry
基金
国家自然科学基金(51063006)
天水师范学院重点学科基金项目(TSA0818)
