Preparation And Properties Of Novel Metallophthalocyanine Polymers

Metallophthalocyanine is macrocyclic molecule with a planar conjugated array of 18-?electrons,have strong absorption in the long-wavelength visible region,which have been extensively investigated as photocatalysts to degrade dyes under visible-light irradiation.However,metallophthalocyanine has the disadvantage of high aggregation tendency in organic solvents and aqueous solution owing to the strong?-?stacking interactions,which decrease its photocatalytic performance.Moreover,metallophthalocyanine is small-molecule organic dye and easy to cause secondary pollution.In order to solve this problem,the novel zincphthalocyanine-based conjugated microporous polymers are designed and synthesized in this paper.The novel zincphthalocyanine-based conjugated microporous polymers with rigid-linker?ZnPcTc-CMP,?-ZnPc-CMP and?-ZnPc-CMP?were synthesized by copolymerization of zinc phthalocyanine?ZnPc?and 4,6-diaminoresorcinol dihydrochloride?DADHC?.The ZnPcTc-CMP,?-ZnPc-CMP and?-ZnPc-CMP were utilized as heterogeneous photocatalysts to degrade Rhodamine B?RhB?in aqueous solution.The highly ordered skeletal alignment and two-dimensional open-channel structure of ZnPcTc-CMP,?-ZnPc-CMP and?-ZnPc-CMP not only solve the aggregation of ZnPc and enhance its photocatalytic activity,but also facilitate the recycling and avoid the secondary pollution.The structures,morphologies and stability of ZnPcTc-CMP,?-ZnPc-CMP and?-ZnPc-CMP were well characterized by Fourier transform infrared spectra?FT-IR?,solid-state ¹³C nuclear magnetic resonance(¹³C NMR),scanning electron microscopy?SEM?,N₂-sorption/desorption and X-ray diffraction?XRD?and thermogravimetric analysis?TGA?.Furthermore,the photocatalytic tests indicated ZnPcTc-CMP,?-ZnPc-CMP and?-ZnPc-CMP have excellent photocatalytic performances for degradation of RhB?3h,degraded 95.4%,98%and 97.47%?in the presence of H₂O₂ under visible-light irradiation.Moreover,the possible reaction mechanism of ZnPcTc-CMP,?-ZnPc-CMP and?-ZnPc-CMP as photocatalysts for the degradation of RhB is proposed.