Abstract Novel tetrasubstituted cobalt phthalocyanine-multi-walled carbon nanotube composites ([4a(OPh-p-Cl)CoPc]-MWCNTs) were prepared to efficient catalytic oxidation of styrene to benzaldehyde. The [4a(OPh-p-Cl)CoPc]-MWCNTs composites were characterized by UV–vis spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. In order to achieve efficient and selective catalysis, the effects of solvent types, oxidant types, catalyst amount, temperature and reaction time on catalytic performance have been studied. It was found that the [4a(OPh-p-Cl)CoPc]-MWCNTs composites performed very high catalytic activity in the styrene oxidation reaction. The highest styrene conversion (99.17%) and benzaldehyde selectivity (88.93%) were obtained under the optimum conditions of 20 mg of [4a(OPh-p-Cl)CoPc]-MWCNTs, oxidant being TBHP for 2 mL, and in THF at 80 °C for 4h. Furthermore, the possible reaction mechanism for [4a(OPh-p-Cl)CoPc]-MWCNTs composites selectively oxidized styrene to benzaldehyde was also proposed.

中文翻译：

---

酞菁钴-多壁碳纳米管复合材料选择性氧化苯乙烯为苯甲醛

摘要 制备了新型四取代钴酞菁-多壁碳纳米管复合材料（[4a(OPh-p-Cl)CoPc]-MWCNTs）以有效催化将苯乙烯氧化为苯甲醛。[4a(OPh-p-Cl)CoPc]-MWCNTs 复合材料通过紫外可见光谱、X 射线衍射、傅里叶变换红外光谱、扫描电子显微镜和透射电子显微镜进行表征。为了实现高效和选择性催化，研究了溶剂类型、氧化剂类型、催化剂用量、温度和反应时间对催化性能的影响。结果表明，[4a(OPh-p-Cl)CoPc]-MWCNTs 复合材料在苯乙烯氧化反应中表现出非常高的催化活性。最高的苯乙烯转化率 (99.17%) 和苯甲醛选择性 (88. 93%) 在 20 mg [4a(OPh-p-Cl)CoPc]-MWCNTs 的最佳条件下获得，氧化剂为 TBHP 2 mL，在 THF 中在 80 °C 下放置 4 h。此外，还提出了[4a(OPh-p-Cl)CoPc]-MWCNTs复合材料选择性氧化苯乙烯为苯甲醛的可能反应机理。