Synthesisofe？cientbluephosphorescentheterolepticIr(III)complexes containing4-alkoxy-or4-alkylaminopicolinatesasancillaryligands

저자

윤*찬

게재저널

Journal of Luminescence 188호 (2017년)

키워드

PhosphorescentIr(III)complexes, Organiclightemittingdiode(OLED), Blue-emitting, Highphosphorescentquantume？cienc

개요

Newbluephosphorescentiridium(III)complexescontaining2-phenylpyridinederivativesasthemainligands and4-substitutedpicolinatesastheancillaryligandsweresynthesizedandtheirphotophysicalpropertieswere investigated.Inaddition,thestructuresofthreeoftheiridium(III)complexesweredeterminedbyX-ray crystallography.Thephotophysicaldatashowthattheintroductionofelectron-donatinglong-alkoxyor dialkylaminochain(？OCH 2 CH 2 OCH 2 CH3, ？OC 5 H 11, ？OC 6 H 13, ？OC 7 H 13, ？N(C3 H 7)2,or ？N(C4 H 9)2)onthe4-positionofpicolinateimprovedthephosphorescencequantume？ciencies(Φ p =0.57？0.77)ofsynthesized iridium(III)complexeswiththemaximumemissionrangeof461？464nmat298Kinethanolsolution. Interestingly,thesubstitutionofthemethylgroupatthe4-positionofthepyridineringofthe2-phenylpyridine mainligandsinthecomplexeswithamorestronglyelectron-donatingmethoxyordimethylaminogroupresults inasigni？cantbathochromicshift(69nm)ratherthanahypsochromicshiftofthephosphorescenceemission maxima.Density ？eldtheory(DFT)calculationswereperformedtogaindeeperunderstandingoftheseemission behaviors.ThethermallymoststableIr7amongthesynthesizedbluephosphorescentiridium(III)complexeswas testedasanemittingmaterialinasimpleOLEDdevice.

첨부파일

• Synthesisofe？cientbluephosphorescentheterolepticIr(III)complexes containing4-alkoxy-or4-alkylaminopicolinatesasancillaryligands.pdf [971,085 byte]

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