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不同偶氮基取代酞菁化合物的合成及性质研究.docx

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不同偶氮基取代酞菁化合物的合成及性质研究 Title:SynthesisandPropertiesofVariousDiazoniumSubstitutedPhthalocyanineCompounds Introduction: Phthalocyaninesareaclassofhighlyconjugatedmacrocycles,consistingoffourisoindoleunitslinkedthroughnitrogenatoms.Theyhaveattractedsignificantattentioninvariousfields,includingorganicelectronics,catalysis,andbiomedicalapplicationsduetotheiruniquepropertiessuchashighphotostability,excellentelectricalconductivity,andstrongabsorptioninthevisibleandnear-infraredregions.Substitutingthephthalocyaninecorewithdifferentfunctionalgroupscanfurthermodulatetheirproperties.Amongthese,diazoniumsubstitutionhasemergedasaversatilemethodtointroducevariousorganicsubstituentsontothephthalocyanineframework,providingawiderangeoftailoredmaterialswithdesirableproperties.Thispaperaimstoreviewthesynthesisandpropertiesofvariousdiazonium-substitutedphthalocyaninecompounds. SynthesisofDiazoniumSubstitutedPhthalocyanineCompounds: 1.Diazotization:Thefirststepinvolvesthepreparationofthediazoniumsaltbythereactionofanaromaticaminewithsodiumnitriteinthepresenceofacid.Thisprocessgeneratesanaryldiazoniumcation,whichactsastheelectrophileinsubsequentreactions. 2.Substitution:Thediazoniumcationthenundergoesnucleophilicsubstitutionwithaphthalocyaninederivative.Thisreactioncanoccuratdifferentpositionsofthephthalocyaninecore,leadingtodifferentsubstitutionpatterns.Commonsubstitutionpositionsincludetheperipheralpositions(positions2,3,9,10,16,and17)andthecentralpositions(positions20and21). 3.Post-reactionmodifications:Afterthesubstitutionreaction,furthermodificationscanbecarriedouttotunethephysicalandchemicalpropertiesofthediazonium-substitutedphthalocyaninecompounds.Thesemodificationsincludecross-couplingreactions,metalcomplexation,andfunctionalgroupconversions. PropertiesofDiazoniumSubstitutedPhthalocyanineCompounds: 1.Opticalproperties:Diazonium-substitutedphthalocyaninecompoundsexhibitstrongabsorptioninthevisibleandnear-infraredregions,makingthempotentialcandidatesforphotonicandoptoelectronicappli