合成了系列均苯三甲酸氧钒配合物催化剂,并进行了FT-IR、紫外-可见漫反射光谱(DR UV-Vis)及TG表征.系统考察了催化剂、不同种类的离子液体助剂、离子液体用量和反应时间等因素对异丁香酚氧化制备香草醛的影响.结果表明,n(VO2+):n(BTC(均苯三甲酸根))=1:1时制备的催化剂VO(BTC)-l性能较佳.以VO(BTC)-1为催化剂、氯化1-十二烷基-3-甲基咪唑([C12mim] Cl)为助剂、丙酮为介质,当n(异丁香酚):n(H2O2):n([C12mim] Cl)=1:2:0.01时20℃反应24 h,异丁香酚可转化完全,香草醛收率达到87.2％.基于离子液体介入的催化剂光谱特征及反应结果,推测[C12mim] Cl/VO (BTC)-1与H2O2形成了高效的氧化反应体系从而有利于异丁香酚的温和转化.
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