Preparation Of Metal Phthalocyanine Composite Materials And Theirs Catalytic Oxidation Performance

From discovery to widespread use,in decades,humans have increasingly recognized the importance of Phthalocyanine(Pc).Phthalocyanine metal complexes are structurally related to porphyrins.Phthalocyanine is a pure synthetic planar macrocyclic compound with fairly uniform electron density distribution.There is a cavity with a diameter of about 0.27 nm,located in the middle of the ring.The cavity can be coordinated with more than 70 elements such as Zn,Fe,Al,Co,Cu,Ni,Si,covering almost all metals elements and some non-metallic elements.Phthalocyanine has high stability,good spectral performance and a wide variety,which has been widely used in electrochromism,photovoltaic cells,chemical sensors,photosensitizer liquid crystal materials,photodynamic therapy and catalyst.However,the catalytic efficiency of phthalocyanine can be seriously affected because of the aggregation effect of phthalocyanine.Therefore,the modification of the periphery of phthalocyanine can greatly improve the solubility of phthalocyanine and regulate its catalytic performance on the other hand.In this paper,different metal phthalocyanines and different substituted phthalocyanines were synthesized by phthalonitrile liquid phase method,and these phthalocyanines were loaded on acidified carbon nanotubes and acidified graphene by ultrasound to obtain high activity metal phthalocyanine composite materials,and they were used in different chemical catalysis,to develop a new direction of chemical catalysis.The specific content is as follows:(1)Through the ultrasonic synthesis of[4a(OPh-p-CF₃)CuPc]-MWCNTs composite material,the[4a(OPh-p-CF₃)CuPc]-MWCNTs composite material as a catalyst for the reaction of benzyl alcohol and DMF synthesis of benzamide reaction,to explore the type of solvent,oxidants,catalyst and benzyl alcohol mass ratio,blank experiments,etc.,to study its catalytic performance.Possible catalytic mechanisms are proposed.(2)The[4a(OPh-p-Cl₂)CuPc]-MWCNTs composite material was synthesized by ultrasonic method,and the[4a(OPh-p-Cl₂)CuPc]-MWCNTs composite material was used as a catalyst for the catalytic oxidation of benzyl alcohol.Through the screening of various conditions,the different substituents were explored,and whether the electronic strength of substituents affected its catalytic performance.The possible mechanism of catalytic oxidation of benzyl alcohol was explored.The results show that the electronic effect of substituents will affect the catalytic performance of the catalyst,and the selectivity of benzaldehyde will increase with the strengthening of electronic effect of substituents.(3)The[4a(OPh-p-CF₃)FePc]-Gr composite was synthesized by ultrasonic method.The[4a(OPh-p-CF₃)FePc]-Gr composite was used as catalyst to catalyze the oxidation of phenol to benzoquinone and methylbenzoquinone.In the reaction,C-H methylation was developed to synthesize methyl benzoquinone in one step,which has good selectivity,and p-benzoquinone can also be synthesized in one step through the choice of solvent,with the selectivity reaching 100%.And the adaptability of the substrate was explored,and all of them have good adaptability.It is proved that the metal phthalocyanine graphene composite has excellent catalytic performance.