Synthesis,Characterization And Spectroscopy Properties Of An Asymmetircal Nickel Phthalocyanine Aggregates

Phthalocyanine compounds is published nearly hundred years,with thecharacteristics of its unique synthetic method, light stability,good thermalstability,good photoelectric properties and the structure of phthalocyanine is easy toadjust by the researchers attention.So far as functional materials phthalocyaninecompounds used in various research fields such as medicine, solar cells, laser printing,LCD display, infrared detectors and so on.Compared with the symmetric phthalocyanine, asymmetrical phthalocyanineexcept own the same characteristics,also have the characteristic better than symmetricphthalocyanine;such as,good second order nonlinear optical activity,goodsolubility,easy to LB films.These features make the asymmetric synthesis ofphthalocyanine and applications in electronics is very optimistic, either from orcharacteristic in the A3B type asymmetric phthalocyanine is particularly prominentsynthesis method.This paper aim to research on A3B type asymmetrical phthalocyanine based theirstudy. Six kinds of A3B type asymmetrical phthalocyanine were synthesized. Fivekinds of A3B type asymmetric nickel phthalocyanine for differentsubstituents:2-(6-ethyl-5-methyl-4H-cyclopenta[b]furan)-9,16,23-three(4-isopropyl-phenoxy)nickel phthalocyanine;2-(6-ethyl-4,5-dimethyl-4H-cyclopenta[b]furan)-9,16,23-three(5-methyl-2-isopropyl-phenoxy)nickel phthalocyanine;2-(6-isopropyl-4-methyl-4H-cyclopenta[b]furan)-9,16,23-three(2-tert-butyl-phenoxy)nickelphthalocyanine;2-(6-isopropyl-5-methyl-4H-cyclopenta[b]furan)-9,16,23-three(4-tert-butyl-phenoxy)nickelphthalocyanine;2-(6-ethyl-5-methyl-4H-cyclopenta[b]furan)-9,16,23-three(4-isopropyl-phenoxy)nickel phthalocyanine.Optimized according tothe different amount of organic alkali catalystDBU[1,8-Diazabicyclo[5.4.0]undec-7-ene].And the other A3B type asymmetriccopper phthalocyanine:2-(6-ethyl-5-methyl-4H-cyclopenta[b]furan)-9,16,23-three(4-isopropyl-phenoxy)copper phthalocyanine, the stability is so bad, so only on thesimple analysis of the testing and characterization.This paper has studied thetheoretical and practical based on the A3B type asymmetric phthalocyanine synthesismechanism and application in practice in the future.Conclusion: (1)The yields of five asymmetric nickel phthalocyanine increases with theamount of the DBU, when n-caprylic alcohol: DBU=5:2.But Continue to increase theamount of the DBU,the yield of asymmetrical nickel phthalocyanine decrease,gradually tends to0.(2)Relative to the asymmetric nickel phthalocyanine,found asymmetric copperphthalocyanine is unstable at r.t, easy to decompose,easy to change color when inbright light,yield so low, difficult separation; it is difficult to get the high purity.(3)Through research the type of the five asymmetrical nickel phthalocyanine,wefound that the reason cause the yield increase may:1)increase the number of the alkylsubstituent in phenol ring;2)smaller steric hindrance of alkoxy in phenol ring maylead to the yield growth;3) compared with the ortho-alkoxy phenol,steric hindrance islower in para-alkoxy phenol this may cause the yield of the asymmetricphthalocyanine growth.