Preparation And Properties Of Donor-acceptor Materials Based On Phthalocyanine And Triazatetrabenzcorrole

We have designed and synthesized several substituted phenothiazine phthalocyanines and triazatetra-benzcorroles, then discussed photophysical,photochemical, electrochemical properties of donor-acceptor system compounds,focused on photoinduced electron transfer process of the intramolecular and intermolecular donor-acceptor compounds, and discusses the two systems of products potential applications in organic solar cell.To begin with, four kinds of phthalocyanines and two triazatetrabenzcorroles including H2Pc(α-PTZ)4 、 H2Pc(β-PTZ)4 、 PPc(OH)2(β-PTZ)4 、V-SiPc(β-PTZ)4 、POTBC(β-PTZ)4 and SiTBC(β-PTZ)4 have been synthesized in which Phenothiazine substituted phthalonitrile and 1,3-Diiminoisoindoline are raw materials. The six products are fully measured and confirmed by Fourier Transform infrared spectroscopy, UV-Vis spectroscopy,Laser flash photolysis, Fluorescent spectroscopy and Cyclic voltammetry.We found that Phenothiazine functional phthalocyanines and triazatetrabenzcorroles bring in excellent properties including effective quenching of fluorescence and Photoinduced electron transfer which is favor by thermodynamic driving force. The all above proves that Phenothiazine functional phthalocyanines and triazatetrabenzcorroles are excellent D-A materials for poteitial using in organic solar cells.The typical spectral titration was used and the strong selfassembly between the phthalocyanine and four rhodamine dyes were revealed by UV-vis absorption and fluorescence spectra. Thermodynamic data show that the driving force for the binding is static electric attraction and π-π stacking effect.The selfassembly facilitates efficient PET process. The molecular structure of rhodamines exhibits significant effects on both binding and PET process, which is mainly due to the steric effect. The PET products were identified by laser flash photolysis, and the charge recombination rate is slow. Therefore the non-covalent Pc-rhodamines are very good pairs of donor/acceptor for potential efficient solar energy conversion.