链状高分子金属配合物催化氧化苯乙烯

Chain Polymeric Metal Complexes Catalytic Oxidation Styrene with Molecular Oxygen

利用链状Salen型高分子希夫碱金属配合物PLSBM(M:CoⅡ,MnⅡ,ZnⅡ,CuⅡ)作为催化剂,催化分子氧氧化苯乙烯。结果表明,在不添加任何助剂和共还原剂的条件下,氧化产物以苯甲醛(Ⅰ)和环氧苯乙烷(Ⅱ)为主,PLSBCuⅡ具有最佳的催化活性和产物选择性。考察了影响氧化反应的因素,发现在反应温度为90℃、反应时间为9h和催化剂与苯乙烯用量比为1mg∶2mL时,苯乙烯具有最优的转化率(61%)和产物选择性(Ⅰ∶57%,Ⅱ∶36%)。

The chain polymeric salen schiff base metal complexes PLSBM（M：Co^Ⅱ,Mn^Ⅱ,Zn^Ⅱ,Cu^Ⅱ）were used as the catalyst on catalytic oxidation styrene under 1 atmospheric pressure of molecular oxygen without additive and reductant.Benzaldehyde（Ⅰ） and styrene oxide（Ⅱ） were obtained as the major products.The PLSBCuⅡ showed the better catalytic activity and products selectivity.The factors that influence the oxidation were also investigated.It was found that the conversion reached up to 61% and selectivity for Ⅰwas 57% and Ⅱwas 36% under the reaction temperature 90℃,reaction time 9h and the ratio of catalysts to styrene 1mg∶2mL.