稀土銪取代多金屬氧酸鹽復合材料的制備及熒光性質的研究.pdf

1、學校代碼：!Q壘QQ分類號：盟⑧研究生學號：密級：東牡埽葒大孽碩士學位論文星QQ壘壘!Q壘墨玉稀土銪取代多金屬氧酸鹽復合材料的制備及熒光性質的研究PreparationandfluorescencepropertiesbasedOHeuropiumsubstitutedpolyoxometalates指導教師學科專業(yè)研究方向學位類型作者：孫永玲龔劍教授無機化學雜多酸／高分子功能材料學歷碩士東北師范大學學位評定委員會2007年5月Abst

2、ractPolyoxometalates(POMs)includingIJlelementssuch夠S一，Eu”，1rb”andD廣areofspecialinterestastheycanproduces仃ongfluorescence，highfluorescentefficiencyverysharpemissionbands，longdecaytimesandexcellentmonochromatocityespeciall

3、yhighthermalstabilityDuetoabovecharactersLncomplexesaregoodcandidatesforvariouselectronicmagnetic，Lewisacidcatalyticcenters，especiallyforluminescentmateriaIsRegardingdifferentPOMsincorporatingEuions(EuPOMs)觴rawmaterialst

4、heEuPOMsfPl，Acomplexmatedalswithdifferentmorphologicalwerepreparedbvdi疵renttechniquesnephotoluminescentbehaviorsoftheEuPOMscomplexmaterialswithdifferentmorphologicalwerediscussed1Usingfoatprolongingtechnique，theultrathin

5、filmwereprepared，includingEuWla／PVA、EuPWn／PVA、EuSiWIJPVA與EuP2WIT／PV九FrIRspectraandUVVisspectraindicatedthattheEu—POMs／PVAulnatllinfilmkeptingoodagreementwithoriginalcompounds。meanwhile，theyalsoshowedthepresenceofintermol

6、ecularbondingbetweenEuPOMsandPV九Differentphotoluminescentbehavio俗ofEuPOM泖VAwereexploredandresearched，eitheL2Usingelectrospinningmethod，theEuPOMs／PVAtheultrafinefibermatswerepreparedDatasofFrIRspectraandUVViSSpectfaindica

7、tedthattheEu—PoMs／PVAultra—fmefibermatskeptingoodagreementwithoriginalcompounds，meanwhile，theyalsoshowedthepresenceofintermolecolarbondingbetweenEuPOMsandPVAScanningelectronmicroscopy(SEM)showedtheEu—POMs／PVAultrafinefib

8、ermatswithsmoothsurfaceswithoutdropletandrandomorientednanometerscaleThcdiameterswereintherangeof200to600nmFluorescencespectrashowedperfectphotoluminescentbehaviorsintheultra—fmefibermats3Improvingtraditionalelectrostati

9、clayerby—layer(LBL)technique，electrospunPVAnanofibersmatwascollectedmlindiumtinoxide(fro)substrateHeatcrosslinkednanofibersmatbdAliilewaterinsolubleandfirmlyfixedon盯osubstrateeveⅡinwaterOppositelychargedpoly(allylaminehy

10、drochlorid曲(PAll)andEu—POMswerealternatelyassembledonPVAnanofiberscoatedITOSUbstratetoconstructmultilayersfilmthrougllLBLtechniqueUsingthismethodweprepared(EuWlo／PAH)10、(EuPWll／PAH)10，fEuSiWII／PAH)lo與(EuP2W17／PAH)lomulti

11、layerfilmThcSEMimagesshowedthatEuPWHmultilayerfilmWasselectivelydepositedORP瞄nanofibersbecausetheelectrospunnanofibershavelargersurfaceareaandsurfaceenergythanthatoftheflatsubstra)eThecyclicvoltammogramscurrentresponseso

12、ftheEuPWllmultilayerfilmonPVA／1TOelectrodewereusedtomonitorthedepositionprocessFluorescencespectrashowedperfectphotoluminescentbehaviorsofthe(Eu—POMs／PAH)10／PVMITOmultilayersfilmKeywords：Eu；Polyoxometalates；ultrathinfilm