资源描述：
《spectroscopic investigation of the electron delocalization and molecular conformational changes in polypyrrole induced by different doping ions》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、SPECTROSCOPICINVESTIGATIONOFTHEELECTRONDELOCALIZATION…SPECTROSCOPICINVESTIGATIONOFTHEELECTRONDELOCALIZATIONANDMOLECULARCONFORMATIONALCHANGESINPOLYPYRROLEINDUCEDBYDIFFERENTDOPINGIONSR.TURCU*,R.GRECU**,M.BRIE**,I.PETER*,A.BOT*,W.GRAUPNER****NationalInstituteofR&DforIsotopicandMolecul
2、arTechnologies,P.O.Box700,3400Cluj-Napoca,Romania**InstituteofChemistry"RalucaRipan",3400Cluj-Napoca,Romania***InstitutfurFestkorperphysik,TechnischeUniversityGraz,A-8010Graz,AustriaABSTRACT.Wereportacomparativestudyoftheopticalpropertiesofpolypyrrole(PPY)synthesizedbytwomethods:el
3、ectrochemicalandchemicaloxidationofthemonomer(pyrrole)inthepresenceofdifferentdopingions(p-toluensulfonate,dodecylsulfate,dodecylbenzenesulfonate,perchlorate,tetrafluoroborate).ByusingFTIRandUV-Visspectroscopyweinvestigatedthechangesofthemolecularandelectronicstructureofpolypyrrole
4、inducedbythepreparationconditions.Ourmaingoalwastofindouttherelevantsynthesisparameters,whichhaveastronginfluenceontheelectrondelocalizationlengthandthemoleculararchitectureofpolypyrrole.1.IntroductionConductingpolymersarenewmaterialsthatcombinethemechanicalandchemicalpropertiesofi
5、solatorpolymerswiththeelectricalandopticalpropertiesofinorganicsemiconductorsandmetals.Polypyrroleisoneofthemostusedconductingpolymersforapplicationsduetothegoodstabilityofhispropertiesandbecauseitcanbeeasysynthesisedasahomopolymerandalsoasacomposite.ThesuccessofPPYapplicationsdepe
6、ndsontheimprovementofthepropertiesandtheprocessabilityofthismaterial.ThereforeoneofthemainresearchgoalisthecorrelationbetweenthesynthesisparametersandthemoleculararchitectureofPPYinordertoobtaintherequiredpropertiesforaspecificapplication[1].Inthispaperwereportacomparativestudyofth
7、eopticalpropertiesofpolypyrrole(PPY)synthesizedbytwomethods:electrochemicalandchemicaloxidationofthemonomer(pyrrole)inthepresenceofdifferentdopingions(p-toluensulfonate,dodecylbenzenesulfonate,perchlorate,tetrafluoroborate).ByusingFTIR,UV-Visspectroscopyweinvestigatedthechangesofth
8、emolecularandelectronicstr
