光学非线性功能聚炔的制备与性能-研究

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1、东华大学硕士学位论文摘要PREPARATIONANDPROPERTIESOFNONLINEAROPTICALFUNCTIONALPOLYACETYLENESABSTRACTPolyacetylenesaswell-knownconjugatedpolymerspossessexcellenttimeresponseandelectronicalconductivity.Theyalsoexhibitnoveloptical,electronicandbiologicalpropertieswhenappropriatesubstituentsorpendants

2、areappendedtothepolyenebackbones.Nonlinearopticalmaterialscanbebothusedasfrequencyconversionmaterialandinformationprocessingmaterial,whichplaysanimportantroleinthesolidlasertechnologyandotherphotoelectrictechnology.Threenovelpolyacetyleneswithnonlinearopticalgroupweredesignedandsynth

3、esizedinthisdissertation,andtheirstructuresandpropertieswerecharacterizedandevaluated.Thecontentofthedissertationareasfollow.1.Thedevelopment,synthesismethodandlatestapplicationoffunctionalpolyacetyleneswerereviewedindetail.2.Threemonomermoleculeswithdifferentconjugationlengthweredes

4、ignedandsynthesized.Thehomopolymersofthemwerepreparedbysolutionpolymerizationusingmetalascatalyst.Thestructureofthemonomersandhomopolymerswascharacterizedbyelementalanalysis(EA),fouriertransform1infraredspectoscopy(FT-IR),nuclearmagneticresonance(H-NMR)technologies.3.Thethermalproper

5、tiesofthemonomersandhomopolymersweremeasuredbydifferentialscanningcalorimetry(DSC)andthermogravimetricanalyzer(TGA)technologies.Theresultsshowthatthethermalstabilityofhomopolymerisbetterthanthatofmonomer,andthemechanismofstabilitywasdiscussedindetail.4.Theopticalpropertiesofmonomersa

6、ndhomopolymerswerestudiedbyZ-scan,ultravioletandvisiblespectroscopy(UV-vis).ItcanbefoundoutthatthepeaksofUVabsorptionandfluorescenceemissionexhibitredshiftwiththeincreaseofconjugationlengthforbothmonomersandhomopolymers.Inaddition,theUVabsorptionpeaksofhomopolymersbroadenedcomparedwi

7、ththatofmonomers.TheresultsofZ-scanshowthatthenonlinearopticalIII万方数据东华大学硕士学位论文摘要propertiesofhomopolymershavebeenimprovedsignificantlythanthatofmonomers.Furthermore,thenonlinearopticalmechanismwasdiscussedthoroughly.QianJin(PolymerChemistryandPhysics)SupervisedbyHongyaoXuKEYWORDS：Pol

8、yacetylenes,