新型铱金属配合物电子结构及光谱性质的密度泛函理论分析-density functional theory analysis of electronic structure and spectral properties of novel iridium metal complexes.docxVIP

新型铱金属配合物电子结构及光谱性质的密度泛函理论分析-density functional theory analysis of electronic structure and spectral properties of novel iridium metal complexes.docx

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新型铱金属配合物电子结构及光谱性质的密度泛函理论分析-density functional theory analysis of electronic structure and spectral properties of novel iridium metal complexes

太原理二c大学硕士研究生学位论文DFTSTUDYONELECTRONICSTRUCTURESANDSPECTROSCOPICPROPERTIESOFANEWTYPEOFIRIDIUM(III)COMPLEXESABSTRACTRecentyears,transitionmetalcomplexeshaveattractedconsiderableattentionduetotheirpotentialapplicationsinorganiclight-emittingdiodes(OLEDs).Uptonow,highefficientIr(III)complexeshavebeenextensivelystudiedbyopticalspectroscopyandelectrochemistrytechniques,buttheprocessesofluminescenceandchargecarriertransportingwerestillnotunderstooddistinctly.SothetheorystudiesoftheIr(IJJ)metalcomplexeshaveattractedmoreandmoreattention.Now,thequantumchemistrycalculationmethod,especiallythedensityfunctional出eory,wasappliedtosolvetheproblemssuchasthedesignofmolecularstruc阳re、chargetransitionandtherelationshipofelectronicstructureandspectroscopyproperty.ltcanprovidetheoryguidesforefficientcomplexesaswellaslargesupportinexperimentaldata.lnthispaper,theelectronicstructuresandspectroscopypropertywasstudieddeeplyforanewtypeoflridiummetalcomplexesbydensityfunctionaltheory,andthedesiredresultswereobtained.1、Theexperimentalstudyrcvealedthat(pPY)21r(R-BTZ)((ppy=2-phenIII、,》太原理工大学硕士研究生学位论文ypyriryl,2-(2二hydroxyphenyl)benzothiazole(BTZ),2-(3-me白yl-2-hydroxy-phenyl)benzothiazole(3-MeBTZ),2-(4-methyl-2-hydroxyphenyl)benzothiazole(4-MeBTZ),2-(4-trifluoromethyl-2-hy由oxyphenyl)benzothiazole(4-TfmBTZ))isanewtypeofsinglecomponentcomplexeswithmulticoloremittingatroomtempera仙re.Inthispaper,theluminescentmechanismwasinvestigatedbyquan阳mchemicalcalculationsbasedondensityfunctionaltheory(DFT)andthecalculationresultsareconsistentwiththeexperimentaldata.ηle-CH3on4-positionofBTZinflucncestheelectronicstructureandthedistributionofHOMOsandLUMOsmoreobvioussothatmakestheabsorptionandemissionspectrared-shi位moredistinctively.Itisfoundthatthemulti-emissionbandsunderultravioletlightexcitationatroomtempera阳rewerecausedbythedifferentenergytransfersbetweendifferentexcitedstates.Theblueemittingrelatestotheligandcenter(π→1t*)ofR-BTZandthegreenemissionoriginatesinl\1LCT(ppy→Ir)emissionofIr(ppy)2fragment.Theredemissio

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