DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Tae-Won | ko |
dc.contributor.author | Kim, Hyung-Jun | ko |
dc.contributor.author | Lee, Kang-Mun | ko |
dc.contributor.author | Lee, Yoon-Sup | ko |
dc.contributor.author | Lee, Min-Hyung | ko |
dc.date.accessioned | 2013-03-12T18:22:38Z | - |
dc.date.available | 2013-03-12T18:22:38Z | - |
dc.date.created | 2013-02-19 | - |
dc.date.created | 2013-02-19 | - |
dc.date.issued | 2013-01 | - |
dc.identifier.citation | INORGANIC CHEMISTRY, v.52, no.1, pp.160 - 168 | - |
dc.identifier.issn | 0020-1669 | - |
dc.identifier.uri | http://hdl.handle.net/10203/103128 | - |
dc.description.abstract | Heteroleptic ((CN)-N-boolean AND)(2)Ir(acac) ((CN)-N-boolean AND = 4-CBppy (1); 5-CBppy (2), 4-fppy (4) CB = ortho-methylcarborane; ppy = 2-phenylpyridinato-C-2,N, 4-fppy = 2-(4-fluorophenyl)-pyridinato-C-2,N, acac = acetylacetonate) complexes were prepared and characterized. While 1 exhibits a phosphorescence band centered at 531 nm, which is red-shifted compared to that of unsubstituted (ppy)(2)Ir(acac) (3) (lambda(em) = 516 nm), the emission spectrum of 2 shows a blue-shifted band at 503 nm. Comparison with the emission band for the 4-fluoro-substituted (lambda(em) = 493 nm) indicates a substantial bathochromic shift in 1. Electrochemical and theoretical studies suggest that while carborane substitution on the 4-position of the phenyl ring lowers the (MLCT)-M-3 energy by a large contribution to lowest unoccupied molecular orbital (LUMO) delocalization, which in turn assigns the lowest triplet state of 1 as [d(pi)(Ir)-->pi*((CN)-N-boolean AND)] (MLCT)-M-3 in character, the substitution on the 5-position raises the (MLCT)-M-3 energy by the effective stabilization of the highest occupied molecular orbital (HOMO) level because of the strong inductive effect of carborane. An electroluminescent device incorporating 1 as an emitter displayed overall good performance in terms of external quantum efficiency (6.6%) and power efficiency (10.7 lm/W) with green phosphorescence. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | LIGHT-EMITTING-DIODES | - |
dc.subject | DENSITY-FUNCTIONAL THEORY | - |
dc.subject | MOLECULAR-ORBITAL METHODS | - |
dc.subject | EXCITED-STATE PROPERTIES | - |
dc.subject | IR(III) COMPLEXES | - |
dc.subject | ELECTROPHOSPHORESCENT DEVICES | - |
dc.subject | ELECTROLUMINESCENT DEVICES | - |
dc.subject | ELECTRONIC-PROPERTIES | - |
dc.subject | QUANTUM EFFICIENCY | - |
dc.subject | PLATINUM COMPLEXES | - |
dc.title | Phosphorescence Color Tuning of Cyclometalated Iridium Complexes by o-Carborane Substitution | - |
dc.type | Article | - |
dc.identifier.wosid | 000313220500020 | - |
dc.identifier.scopusid | 2-s2.0-84872104341 | - |
dc.type.rims | ART | - |
dc.citation.volume | 52 | - |
dc.citation.issue | 1 | - |
dc.citation.beginningpage | 160 | - |
dc.citation.endingpage | 168 | - |
dc.citation.publicationname | INORGANIC CHEMISTRY | - |
dc.identifier.doi | 10.1021/ic3015609 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Lee, Yoon-Sup | - |
dc.contributor.nonIdAuthor | Kim, Tae-Won | - |
dc.contributor.nonIdAuthor | Kim, Hyung-Jun | - |
dc.contributor.nonIdAuthor | Lee, Min-Hyung | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | LIGHT-EMITTING-DIODES | - |
dc.subject.keywordPlus | DENSITY-FUNCTIONAL THEORY | - |
dc.subject.keywordPlus | MOLECULAR-ORBITAL METHODS | - |
dc.subject.keywordPlus | EXCITED-STATE PROPERTIES | - |
dc.subject.keywordPlus | IR(III) COMPLEXES | - |
dc.subject.keywordPlus | ELECTROPHOSPHORESCENT DEVICES | - |
dc.subject.keywordPlus | ELECTROLUMINESCENT DEVICES | - |
dc.subject.keywordPlus | ELECTRONIC-PROPERTIES | - |
dc.subject.keywordPlus | QUANTUM EFFICIENCY | - |
dc.subject.keywordPlus | PLATINUM COMPLEXES | - |
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