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1、JournalofMolecularStructure833(2007)23–29www.elsevier.com/locate/molstrucSynthesis,crystalstructureanditsopticalandelectrochemicalpropertiesofanewunsymmetricaldiarylethenea,¤aabaShouzhiPu,GangLiu,GuizhenLi,RujiWang,TiansheYangaJiangxiKeyLabofOrganicChemistry,JiangxiScienceandTechnologyNormalUnivers
2、ity,Nanchang330013,ChinabDepartmentofChemistry,TsinghuaUniversity,Beijing100084,ChinaReceived25June2006;receivedinrevisedform20August2006;accepted25August2006Availableonline12October2006AbstractAnewunsymmetricalphotochromicdiarylethene,1-(2-methyl-5-phenyl-3-thienyl),2-(2-methyl-5-(3-methylphenyl)-
3、3-thienyl)-3,3,4,4,5,5-hexaXuorocyclopent-1-ene(MPMTH),wassynthesizedanditsstructurewasdeterminedbysingle-crystalX-raydiVractionanalysis.Itsopticalandelectrochemicalproperties,includingphotochromicreactivitybothinsolutionandinthecrystallinephase,Xuo-rescenceandelectrochemicalpropertywereinvestigate
4、d.Thediaryletheneunderwentreversiblephotochromism,changingfromcolorlesstoblueafterirradiationwithUVlightorvisiblelight.Themaximumabsorptionoftheclosed-ringisomerofMPMTHwasobservedat577nminhexane.Inhexane,theopen-ringisomerofMPMTHexhibitedrelativelystrongXuorescenceat310nmwhenexcitedat280nm.Theirrev
5、ersibleanodicoxidationofMPMTHwasobservedbyperforminglinearsweepexperiment.©2006ElsevierB.V.Allrightsreserved.Keywords:Photochromism;Diarylethene;Crystalstructure;Opticalandelectrochemicalproperties1.Introductionopticalrecording,photo-switches,andfull-colordisplaysandphotodrivenactuators,becauseofth
6、egoodther-Thedevelopmentofphotochromiccompoundsisanmallyirreversiblepropertiesofthetwoisomersandtheirever-growingWeldduetosomenewpotentialapplica-highsensitivity,fastresponseandremarkablefatiguetionsofthisclassofmaterials[1,2].Generally,therevers-resistance[3,11–16].iblephotochemicalisomerizationof
7、photochromicAlthoughmanyphotochromicdiarylethenederivativesmoleculescanleadtoglobalchangesofthebulkmateri-withtwothiophene-derivedgroupshavebeenreportedtoalscharacteristicssuchasUV–visabsorptionspectra,date
