资源描述：
《Radical Polymerization Tracked by Single Molecule Spectroscopy.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、AngewandteChemieDOI:10.1002/anie.200704196PolymerizationRadicalPolymerizationTrackedbySingleMoleculeSpectroscopy**DominikWöll,HiroshiUji-i,TobiasSchnitzler,Jun-ichiHotta,PeterDedecker,AndreasHerrmann,FransC.DeSchryver,KlausMüllen,andJohanHofkens*Productsfrompolymerizati
2、onhaveinfluencedourdailylivesrelatedtothefreedomofmoleculestomovewithinthetremendouslyoverthepasthundredyears.Itisthereforenotmonomersolutionormatrixformedbythepolymer.FCSsurprisingthatenormouseffortshavebeenandarebeingmeasuresthetimediffusingmoleculesremainwithinamadet
3、ofullyunderstandeachdetailofthepolymerizationdefinedvolumeandalloweddeterminationofD>1321process.Prominentexamplesofanalyticaltechniquesused10msuptohighconversionsUbeforemotionbecame[1]areESRspectroscopy,pulsed-laser-initiatedpolymerizationtooslowandthuslimitedtheappl
4、icabilityofthismethod.[2]inconjunctionwithsize-exclusionchromatographyandWide-fieldmicroscopy(WFM)directlyvisualizestheposition[3][4]massspectrometry,aswellasNMRandfluorescenceoffluorescentmoleculesandisasuitablemethodtotrack[5–11]1221spectroscopy.Withthesetechniques,
5、verydetailedknowl-slowmovingmolecules(D<10ms)andeventodetectedgeaboutpolymerizationkineticscouldbegained.How-moleculeswhichareimmobilized.Bothmethods,therefore,ever,mostofthesetechniquescannotprobeoveralargecomplementeachother,andincombination,theypermitextentofconversi
6、onandallaverageoveranensembleoffollowingtranslationalmotionofdyesfortheentirepoly-molecules.Asaconsequence,noneofthesetechniquescanmerizationprocess.Thedetectionofheterogeneitiesisandetectheterogeneitiesoccurringatmolecularlevelduringimportantadvantageoverdeterminationo
7、fanaveragevaluepolymerization,aphenomenonwhichinfluencesthefinalofDfromviscositymeasurementsusingtheStokes–Einsteinpolymerproperties.Incontrasttoensembletechniques,singlerelation.moleculespectroscopy(SMS)canelucidatesuchheteroge-Perylenediimidederivativeswereusedasprobi
8、ngdyes.neities.Usingdyemolecules1or2,thepolymerizationofstyreneinSMShasalreadybeenusedtostudythedynamicsofsing
