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DC Field | Value | Language |
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dc.citation.endPage | 3680 | - |
dc.citation.number | 15 | - |
dc.citation.startPage | 3673 | - |
dc.citation.title | CHEMISTRY OF MATERIALS | - |
dc.citation.volume | 19 | - |
dc.contributor.author | Kwon, Tae-Hyuk | - |
dc.contributor.author | Kim, Myoung Ki | - |
dc.contributor.author | Kwon, Jongchul | - |
dc.contributor.author | Shin, Dae-Yup | - |
dc.contributor.author | Park, Su Jin | - |
dc.contributor.author | Lee, Chang-Lyoul | - |
dc.contributor.author | Kim, Jang-Joo | - |
dc.contributor.author | Hong, Jong-In | - |
dc.date.accessioned | 2023-12-22T09:12:17Z | - |
dc.date.available | 2023-12-22T09:12:17Z | - |
dc.date.created | 2014-11-13 | - |
dc.date.issued | 2007-07 | - |
dc.description.abstract | A series of efficient light-harvesting systems (FIr3mGx, x = 1-3) based on dendrimer donor (mCP: N,N′-dicarbazolyl-3,5-benzene) derivatives coupled with a sky blue phosphorescent acceptor (FIrpic: iridium(III) bis[(4,6-difluorophenyl)pyridinato-N,C2′]-3-hydroxypicolinate derivative) were prepared, and their photophysical properties were investigated. The light-harvesting ability of FIr3mGx (x = 1-3) increases with the number of energy donor mCP units. The acceptor PL intensity of the donor-acceptor conjugate dendrimers (FIr3mGx, x = 1-3) increases over 6 times with the number of mCP units via sensitization from the light-harvesting antenna after excitation at the donor absorption (λex = 310 nm), as compared to that of only an acceptor without a donor (FIrpic) upon excitation at the MLCT region (λex = 380 nm) because of efficient intramolecular singlet-singlet and triplet-triplet energy transfer from the donor to the acceptor and less luminance quenching induced by the bulky dendrimer structure. The singlet-singlet intramolecular energy transfer in FIr3mGx from the dendrimer donor to the acceptor exhibits a high efficiency of greater than 90% via the steady-state PL method and 94% via the transient PL method. Additionally, the triplet-triplet energy transfer efficiency via the transient PL method exhibits an efficiency greater than 99%. This indicates that FIr3mGx exhibits good light-harvesting abilities because the mCP unit is an efficient light absorber and because the core FIrpic functions as a spatial energy concentrator that drains energy from the dendrimer donor. | - |
dc.identifier.bibliographicCitation | CHEMISTRY OF MATERIALS, v.19, no.15, pp.3673 - 3680 | - |
dc.identifier.doi | 10.1021/cm070536k | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.scopusid | 2-s2.0-34547683199 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/8765 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34547683199 | - |
dc.identifier.wosid | 000248073300019 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Highly efficient light-harvesting system based on a phosphorescent acceptor coupled with dendrimer donors via singlet-singlet and triplet-triplet energy transfer | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | POLY(ARYL ETHER) DENDRIMERS | - |
dc.subject.keywordPlus | EMITTING-DIODES | - |
dc.subject.keywordPlus | ELECTRON-TRANSFER | - |
dc.subject.keywordPlus | PHOTOISOMERIZATION | - |
dc.subject.keywordPlus | POLYMERS | - |
dc.subject.keywordPlus | ELECTROLUMINESCENCE | - |
dc.subject.keywordPlus | CONVERSION | - |
dc.subject.keywordPlus | COMPLEXES | - |
dc.subject.keywordPlus | MOLECULES | - |
dc.subject.keywordPlus | DENDRONS | - |
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