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ID:39145199
大小:2.24 MB
页数:72页
时间:2019-06-25
《自组装单分子膜在金属电极上的表面增强拉曼光谱分析》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、AbstractOrganisedmolecularassemblyhasbecomeoneofthemOstimportantareasofmodernchemicalresearch.ofthevarietyofapproachesusedfortheformationoforganizedmolecularassemblies,theselfassemblyistheoneforemostimponanttechnique.TheVefsatilityofselfassembledmonolayer(SAM)methodologytomakefhnctionalm
2、OnOlaversonmetalsurfhceshasattractedconsiderableattentionintherecentyears,whichcanimproVepotentialapplicationofsuchlayersincorrosionprotection,friction,optics,microelectronics,andchemicalsensors.TheextensionofappIicationofSAMscallsfbrthedeeperunderstandingofSAMswhichrequirest11eanalytica
3、lmethodswiththehighersensitivity.SurfaceenhancedRamanspectroscopy'whichhasbeenprovedtobeoneofthemostsensitivetoolstoinVestigateSAMs,canprovidemoredetailedinformationonthephysicochemicalpropertyofSAMswhilecombinedwithRamanmappingtechnique.Basedonthespectralfeaturealongwi也thecalculatedresu
4、ltsfromquantumchemistfy,wecandeducetheoriemationoftheadsorbedmolecukonmetalsurface.AndthestabilityofSAMsalsohasbeenexaminedbyinsituspectroelectrochemicalmethods.Furthermore,thedensityfhnctionaltheory(DFT)presentedinthethesisprovidesthefhndamentalunderstandingofthechemisorptionofthemolecu
5、leson901dandsilVersurfaceandthestructureofthemonlayersthusformed.Themaincontentsinthethesisarepresentedasfollows:(1)AcombinedprotocoloftheSERStechniquewithDFTcalculationhasbeenusedto100kintotheSAMsof6-mercaptopurineonsilversurface.And“wasfo'dndthattheadsorptionmodeof6MPSAMschangedw“hthep
6、Hvalueoftheenvironment.6MPwasadsorbedonthesilverelectrodewithatiltedorientationviaS,N1,andN7atomsinacidmedium,whiletheSAMsadoptedhead—OnadsorptionmodeswiththeSatomandtheNlatomanchoringthesilversurfaceinalkalinemedium.HoweVer,6MPSAMsturnstothesameuprightorientationontheelectrodethroughthe
7、SandN7atomswheneitheracidorbasicsolutionwasremoved.TheresunsreVealthedesorptionpotentialsof6MPSAMsunderacidandalkalineconditionsfromtheAgelectrodewereatca.一1.3Vand一1.6VvsSCE,respectively.Thedif话rentbehaViOrsof6MPSAMsongoldandsilversurfacealsowerecomparatiVelystudied(2)The
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