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1、JournalofMolecularStructure919(2009)100–111ContentslistsavailableatScienceDirectJournalofMolecularStructurejournalhomepage:www.elsevier.com/locate/molstrucSynthesisandtheoptoelectronicpropertiesofdiarylethenederivativeshavingbenzothiopheneandn-alkylthiophen
2、eunitsa,*a,baaaShouzhiPu,MinLi,CongbinFan,GangLiu,LiangShenaJiangxiKeyLaboratoryofOrganicChemistry,JiangxiScience&TechnologyNormalUniversity,Nanchang330013,PRChinabCollegeofBiology,ChemistryandMaterialScience,EastChinaInstituteofTechnology,Fuzhou344000,PRCh
3、inaarticleinfoabstractArticlehistory:Sixnewunsymmetricaldiaryletheneshavingbothbenzothiopheneandn-alkylthiopheneunitshavebeenReceived8July2008synthesized.Thestructuresofdiarylethenes2a–6aweredeterminedbysingle-crystalX-raydiffractionReceivedinrevisedform18A
4、ugust2008analysis.TheresultsshowedthatthealkylchainlengthhadasignificanteffectontheoptoelectronicAccepted22August2008propertiesofthesediarylethenes,includingphotochromism,fatigueresistance,fluorescenceandelectro-Availableonline5September2008chemicalproperties
5、.Thelongalkylchainscanincreasethecyclization/cycloreversionquantumyieldsbutdecreasetheabsorptionmaximaofdiarylethenes1–6.ThelongalkylchainscanalsoinducearemarkableKeywords:bathochromicshiftfortheabsorptionmaximaoftheclosed-ringisomers1b–6bbothinsolutionandi
6、nDiarylethenePMMAfilm.Allthesediarylethenederivativesshowedgoodfluorescentswitching(quenchtoca.10%)inAlkylchainlengthPhotochromismhexane.Theemissionintensitiesandthefluorescentquantumyieldsofdiarylethenes1–6decreasedCrystalstructuregraduallywiththealkylchainle
7、ngthbecominglonger.Inaddition,cyclicvoltammetrytestsshowedthatOptoelectronicpropertythealkylchainlengthhadaremarkableeffectontheelectrochemicalbehaviorsofthesediarylethenes.Ó2008ElsevierB.V.Allrightsreserved.1.Introductionstability[22],outstandingfatigueres
8、istance[23,24],shortresponsetime[25,26],andhighquantumyields[27].Infact,theyPhotochromicdiarylethenesundergoreversiblephotoisomer-havebeenconsideredasthemostpromisingphotochromiccom-izationbetweentwois
