Heteroleptic Cyclometalated Iridium(III) Complexes Supported by Triarylborylpicolinate Ligand: Ratiometric Turn-On Phosphorescence Response upon Fluoride Binding

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dc.contributor.authorSharma, Sanjeevko
dc.contributor.authorKim, Hyungjunko
dc.contributor.authorLee, Young Hoonko
dc.contributor.authorKim, Taewonko
dc.contributor.authorLee, YSko
dc.contributor.authorLee, Min Hyungko
dc.date.accessioned2015-01-27T02:47:30Z-
dc.date.available2015-01-27T02:47:30Z-
dc.date.created2014-09-22-
dc.date.created2014-09-22-
dc.date.issued2014-08-
dc.identifier.citationINORGANIC CHEMISTRY, v.53, no.16, pp.8672 - 8680-
dc.identifier.issn0020-1669-
dc.identifier.urihttp://hdl.handle.net/10203/193163-
dc.description.abstractHeteroleptic cyclometalated iridium(III) complexes (C boolean AND N)(2)Ir(Bpic) (4-6) (C boolean AND N = dfppy (4), ppy (5), btp (6)) supported by triarylborylpicolinate (Bpic) ancillary ligand were synthesized and characterized. X-ray diffraction study of 5 confirmed N boolean AND O chelation of the Bpic ligand to the iridium center forming an (C boolean AND N)(2)Ir borane conjugate. While the UV/vis absorption bands of 4-6 remained almost unchanged in the low-energy region upon fluoride addition, a ratiometric turn-on phosphorescence response was observed for 4 and 5. In contrast, the phosphorescence of 6 was little affected by fluoride binding. Experimental and theoretical studies suggest that the LUMO in neutral 4 and 5 is dominated by the Bpic ligand, which makes the weakly emissive (ML)-M-3'CT/(LL)-L-3'CT (L = C boolean AND N; L' = Bpic) states as the lowest-energy triplet excited state, while the fluoride binding to 4 and 5 induces the highly emissive (MLCT)-M-3/(3)pi pi* states centered on the (C boolean AND N)(2)Ir moiety. Thermally induced conversion from the (MLCT)-M-3/(3)pi pi* to the (ML)-M-3'CT/(LL)-L-3'CT states is suggested to be responsible for the low-energy weak phosphorescence in 4 and 5.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.subject3-COORDINATE ORGANOBORON COMPOUNDS-
dc.subjectINTERLIGAND ENERGY-TRANSFER-
dc.subjectELECTRON-ACCEPTING ABILITY-
dc.subjectMOLECULAR-ORBITAL METHODS-
dc.subjectLIGHT-EMITTING-DIODES-
dc.subjectFLUORESCENCE RESPONSE-
dc.subjectCATIONIC BORANES-
dc.subjectANCILLARY LIGAND-
dc.subjectMLCT PHOSPHORESCENCE-
dc.subjectIR(III) COMPLEXES-
dc.titleHeteroleptic Cyclometalated Iridium(III) Complexes Supported by Triarylborylpicolinate Ligand: Ratiometric Turn-On Phosphorescence Response upon Fluoride Binding-
dc.typeArticle-
dc.identifier.wosid000340576900052-
dc.identifier.scopusid2-s2.0-84962439051-
dc.type.rimsART-
dc.citation.volume53-
dc.citation.issue16-
dc.citation.beginningpage8672-
dc.citation.endingpage8680-
dc.citation.publicationnameINORGANIC CHEMISTRY-
dc.identifier.doi10.1021/ic501286m-
dc.contributor.localauthorLee, YS-
dc.contributor.nonIdAuthorSharma, Sanjeev-
dc.contributor.nonIdAuthorLee, Young Hoon-
dc.contributor.nonIdAuthorKim, Taewon-
dc.contributor.nonIdAuthorLee, Min Hyung-
dc.type.journalArticleArticle-
dc.subject.keywordPlus3-COORDINATE ORGANOBORON COMPOUNDS-
dc.subject.keywordPlusINTERLIGAND ENERGY-TRANSFER-
dc.subject.keywordPlusELECTRON-ACCEPTING ABILITY-
dc.subject.keywordPlusMOLECULAR-ORBITAL METHODS-
dc.subject.keywordPlusLIGHT-EMITTING-DIODES-
dc.subject.keywordPlusFLUORESCENCE RESPONSE-
dc.subject.keywordPlusCATIONIC BORANES-
dc.subject.keywordPlusANCILLARY LIGAND-
dc.subject.keywordPlusMLCT PHOSPHORESCENCE-
dc.subject.keywordPlusIR(III) COMPLEXES-
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