EuPW112mPEI多层纳米复合膜的制备和光谱表征

28,9Vol128,No19,pp21302213320089SpectroscopyandSpectralAnalysisSeptember,2008{(Eu(PW11)2)m/PEI}1,3,2,31.,3610212.,3620003.,028043,,,,2,,(layerbylayerselfassembly,LBL),Eu(PW11)2,,,Eu3+;;;:O611:ADOI:1013964/j1issn1100020593(2008)0922130204:2007203202,:2007206206:(20473069),(2006F3113),(2007F5076)(2007J0369):,,1965,e2mail:wanglimarry@sina1com1cn,,,,,2,[124]1992Decher,2,[5215],,,,LBL,,UV2Vis,X(XPS),1111UV2Vis7562,190850nmXPSEscalab2Mk()Photoelec2tronicspectrometer,AlK2(148616eV),SPEXFL22T2(PEI,MW=50000)(PSS,MW=70000)AldrichMilli2QK11[Eu(PW11O39)2][16],,112PEI/PSS/PEI/((Eu(PW11O39)2)m/PEI)n80H2SO42H2O2(73)70H2O2H2O22NH3(511)0101molL-1PEI(pH910)20min,,PEI0101molL-1PSS20min,,0101molL-1PEI20min,,PEI/PSS/PEI01001molL-1(Eu(PW11O39)220min,(Eu(PW11O39)2PEI,PEI/PSS/PEI/((Eu(PW11O39)2)m/PEI)n2211PEI/PSS/PEI/((Eu(PW11O39)2)m/PEI)n211112(UV),UV,1{(PEI/PSS/PEI)((Eu(PW11O39)2)m/PEI)n},{((Eu(PW11O39)2)m/PEI}UV{PEI/PSS/PEI}UV,225nmPSS200nmPEIEu(PW11)2UV205255nm255nm,1,{(Eu(PW11)2)m/PEI},UV2Vis205nm,Eu(PW11)22((Eu(PW11O39)2)m/PEI)Fig11UV2Visspectraof((Eu(PW11)2)m/PEI)nmultilayerfilmswithn=08onPEI/PSS/PEI2modifiedquartzsubstrates(bothsides),UV2Vis205255nm,Eu(PW11)2,Layer2by2Layer{(Eu(PW11)2)m/PEI}n21112X(XPS),(PEI/PSS/PEI)((Eu(PW11)2)m/PEI)nX(XPS)XPSX(58nm),n=16XPS3((Eu(PW11)2)m/PEI)n16(n=16)NWXPS13129XPS,C,O,N,S,EuWXPSEu(PW11)2SPSS,XPSN1S(40113eV),:PEIPOM,nPEIPOM,,UV2Vis212OMLnn+,Yamase[17],,,,Eu(PW11)2,,((Eu(PW11)2)m/PEI)84{(Eu(PW11)2)m/PEI}8394nm,Eu3+4f6ff5{(Eu(PW11)2)m/PEI}8,Fig14Excitationspectrumofspectraofthe{(Eu(PW11)2)m/PEI}8multilayerFig15Emissionspectrumofspectraofthe{(Eu(PW11)2)m/PEI}8multilayerfilmsonquartz,(Eu(PW11)2)m5D07F1,Eu3+(Eu(PW11)2)m,,,Eu3+,{(Eu(PW11)2)m/PEI}8,,,3Layer2by2Layer,/{(PEI/PSS/PEI)(Eu(PW11)2)m/PEI)n}UV,,XPSPEIPOM,UV,Eu3+[1]LadamG,SchaadP,VoegelC,etal.Langmuir,2000,16:1249.[2]FerreiraM,CheungJH,RubnerMF.ThinSolidFilms,1994,244:806.[3]TovarG,PaulS,KnollW,etal.SupramolecularSci.,1995,2:89.[4]CoronadoE,CarlosJGomez2Garcia.Chem.Rev.,1998,98:273.[5]WANGLi,HUANGBing2qiang,XIEZhao2xiong(,,).ChemicalJournalofChineseUniversities(),2006,27(3):543.[6]WANGLi,WANGXiu2li,HOUYu,etal(,,,).SpectroscopyandSpectralAnalysis(),2004,24(5):613.[7]WangL,XiaoDR,WangEB,etal.JournalofColloidandInterfaceScience,2005,285(2):435.231228[8]WangL,WangE,HaoN,etal.JournalofColloidandInterfaceScience,2004,274:602.[9]WANGEn2bo,HUChang2wen,XULin(,,,).IntroductionPolyacidChemistry().Beijing:ChemicalIndustryPress(:),1998.1.[10]HillCL.Chem.Rev.,1999,99(1):1.[11]PopeMT.HeteropolyandIsopolyOxometalates.BerlinSpringer,1983.[12]XuL,QinC,WangXL,Inorg.Chem.,2003,42:7342.[13]BiLH,KortzU,BinetaK,etal.Inorg.Chem.,2004,43:8367.[14]WassermannK,DickmanMH,PopeMT.AngewardeChemie2InternationalEdition,1997,36:1445.[15]BassilBS,NellutlaS,KortzU,etal.Inorg.Chem.,2005,44:2659.[16]PeacockRD,WeakleyTJR.J.Chem.Soc.A,1971,(12):1836.[17]YamaseT.Chem.Rev.,1998,98(1):307.PreparationandSpectrumofMultilayerFilmsofPolyoxometalate{(Eu(PW11)2)m/PEI}WANGLi1,3,WANGFang2,LIUZong2rui31.SchoolofBiotechnology,JimeiUniversity,Xiamen361021,China2.ChemistryandLifeScienceSchool,QuanzhouTeachersCollege,Quanzhou362000,China3.CollegeofChemistry,InnerMongoliaUniversityforNationalities,Tongliao028043,ChinaAbstractThelayer2by2layerassembly(LBL)isanewmethodofthinfilmdepositionoftenusedforoppositelychargedpolyelec2trolytes.LBLtechniquehasbeenextensivelyusedtomakemultilayerfilmsofpolyionswithbiomoleculessuchasproteins,en2zymesandDNA.Itcanalsobesuccessfullyappliedtothepreparationofthinfilmsofnanoparticles.Ultrathinmultilayerfilmscontainingapolyoxometalate(Eu(PW11)2)mandPEIwerepreparedusinglayer2by2layerassemblymethodinthepresentwork.ThestablemultilayerfilmswereassembledbyalternateadsorptionofnegativelychargedPOMandpositivelychargedpolyelec2trolytesfromtheiraqueousdispersions.Thegrowthofthemultilayerfilmsisregular.TheproposednovelimmobilizedmethodexhibitedgoodstabilityandthephotoluminescentbehavioroffilmsatroomtemperaturewasinvestigatedtoshowtheEu3+char2acteristicemissionpattern,whichisimportantforpracticalapplication.KeywordsPolyoxometalate;Ultrathinmultilayerfilm;Layer2by2layerself2assembly;Photoluminescencebehavior(ReceivedMar.2,2007;acceptedJun.6,2007)33129