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1、hInvestigatingtheeffectsofsidechainlengthontheAIEpropertiesofwater-solubleTPEderivatives#DongYifan1,WANGWeilun1,ZHONGCewen1,SHIJianbing1,TONGBin1,FENG51015202530350Xiao2,ZHIJunge2,DONGYuping1**(1.SchoolofMaterialsScienceandEngineering,BeijingInstituteofTe
2、chnology;2.SchoolofChemistry,BeijingInstituteofTechnology)Abstract:Theemissivepropertiesoffluorophoresinaggregatedstateareimportantforthedevelopmentofbio-sensorsorbio-imagingreagents.Sothreewater-solubleTPEderivativeswithdifferentlengthofsidechainshavebeensy
3、nthesizedandinvestigatedtheeffectsofsidechainsonaggregation-inducedemission(AIE)propertiesintheaggregatedstates.Theresultsindicatethatsidechainsonthefluorophoresplayapivotalroleontheiremissioninaggregatedstatemediatedbyheparinorsolidstate,duetothecoplanarity
4、oftheseTPEderivativeswasaffectedbysidechains.Theratesofradiativedecaykfandnon-radiativedecayknrhavebeenobtainedthroughthequantumyieldsandlifetime,andalargerkfandsmallerknrwerepresentforcompoundTPE-C4N,suggestingthattheaggregatedTPE-C4Nshouldpossesthemostrema
5、rkablefluorescentproperty.Keywords:OrganicSolid;Tetraphenylethylene(TPE);Aggregation-InducedEmission(AIE);FluorescenceEnhancement;HeparinIntroductionThedevelopmentoffluorescentprobesforthedetectionofbiomacromoleculeshasbeenafervidresearchfield,presumablybeca
6、useoftheirpossibilitytoberevolutionarilyappliedinbioscienceandbiotechnologyengineering.[1]Generally,fluorescentbio-probespossessremarkableadvantagessuchaslowbackgroundnoises,highsensitivity,easeofoperation,andbroadworkingscope.[2-3]Amongthefluorescentbio-pro
7、besreportedsofar,themostattractiveonesarethe“turn-on”or“light-up”sensorsduetotheirexcellentavailabilityandreliability.Particularly,signalproducedbythosefluorescentsensorsisdramaticallyenhanced,evenunderthecircumstanceofdecreasingfluorescence,anditcanbedetect
8、edbynakedeyes.[4-6]Traditionalfluorescentbiosensorsusuallysufferfromtheaggregationquenchingeffect(ACQ)presentinsolutionphase,whichadequatelylimitedtheirapplicationsinvariousbiomolecularassays.Ho
