Efficient Light Harvesting and Energy Transfer in a Red Phosphorescent Iridium Dendrimer
DC Field | Value | Language |
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dc.contributor.author | Cho, Yang-Jin | - |
dc.contributor.author | Hong, Seong Ahn | - |
dc.contributor.author | Son, Ho-Jin | - |
dc.contributor.author | Han, Won-Sik | - |
dc.contributor.author | Cho, Dae Won | - |
dc.contributor.author | Kang, Sang Ook | - |
dc.date.accessioned | 2021-09-05T02:03:38Z | - |
dc.date.available | 2021-09-05T02:03:38Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2014-12-15 | - |
dc.identifier.issn | 0020-1669 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/96495 | - |
dc.description.abstract | A series of red phosphorescent iridium dendrimers of the type [Ir(btp)(2)(pic-PCn)] (Ir-Gn; n = 0, 1, 2, and 3) with two 2-(benzo[b]thiophen-2-yl)pyridines (btp) and 3-hydroxypicolinate (pic) as the cyclometalating and ancillary ligands were prepared in good yields. Dendritic generation was grown at the 3 position of the pic ligand with 4-(9H-carbazolyl)phenyl dendrons connected to 3,5-bis(methyleneoxy)benzyloxy branches (PCn; n = 0, 2, 4, and 8). The harvesting photons on the PCn dendrons followed by efficient energy transfer to the iridium center resulted in high red emissions at similar to 600 nm by metal-to-ligand charge transfer. The intensity of the phosphorescence gradually increased with increasing dendrimer generation. Steady-state and time-resolved spectroscopy were used to investigate the energy-transfer mechanism. On the basis of the fluorescence quenching rate constants of the PCn dendrons, the energy-transfer efficiencies for Ir-G(1), Ir-G(2), and Ir-G(3) were 99, 98, and 96%, respectively. The energy-transfer efficiency for higher-generation dendrimers decreased slightly because of the longer distance between the PC dendrons and the core iridium(III) complex, indicating that energy transfer in Ir-Gn is a Forster-type energy transfer. Finally, the light-harvesting efficiencies for Ir-G(1), Ir-G(2), and Ir-G(3) were determined to be 162, 223, and 334%, respectively. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | EMITTING DEVICE APPLICATIONS | - |
dc.subject | ORGANIC ELECTROPHOSPHORESCENCE | - |
dc.subject | CARBAZOLE DENDRONS | - |
dc.subject | TRANSIENT ANALYSIS | - |
dc.subject | IR(III) COMPLEXES | - |
dc.subject | ELECTRON-TRANSFER | - |
dc.subject | DIODES | - |
dc.subject | SYSTEM | - |
dc.subject | EMISSION | - |
dc.subject | LIGANDS | - |
dc.title | Efficient Light Harvesting and Energy Transfer in a Red Phosphorescent Iridium Dendrimer | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Son, Ho-Jin | - |
dc.contributor.affiliatedAuthor | Cho, Dae Won | - |
dc.contributor.affiliatedAuthor | Kang, Sang Ook | - |
dc.identifier.doi | 10.1021/ic502323w | - |
dc.identifier.scopusid | 2-s2.0-84920129544 | - |
dc.identifier.wosid | 000346544100054 | - |
dc.identifier.bibliographicCitation | INORGANIC CHEMISTRY, v.53, no.24, pp.13136 - 13141 | - |
dc.relation.isPartOf | INORGANIC CHEMISTRY | - |
dc.citation.title | INORGANIC CHEMISTRY | - |
dc.citation.volume | 53 | - |
dc.citation.number | 24 | - |
dc.citation.startPage | 13136 | - |
dc.citation.endPage | 13141 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Inorganic & Nuclear | - |
dc.subject.keywordPlus | EMITTING DEVICE APPLICATIONS | - |
dc.subject.keywordPlus | ORGANIC ELECTROPHOSPHORESCENCE | - |
dc.subject.keywordPlus | CARBAZOLE DENDRONS | - |
dc.subject.keywordPlus | TRANSIENT ANALYSIS | - |
dc.subject.keywordPlus | IR(III) COMPLEXES | - |
dc.subject.keywordPlus | ELECTRON-TRANSFER | - |
dc.subject.keywordPlus | DIODES | - |
dc.subject.keywordPlus | SYSTEM | - |
dc.subject.keywordPlus | EMISSION | - |
dc.subject.keywordPlus | LIGANDS | - |
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