DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bejoymohandas, Kochan Sathyaseelan | - |
dc.contributor.author | Kim, Hae Un | - |
dc.contributor.author | Sohn, Sunyoung | - |
dc.contributor.author | Choi, Wanuk | - |
dc.contributor.author | Jung, Sungjune | - |
dc.contributor.author | Monti, Filippo | - |
dc.contributor.author | Park, Taiho | - |
dc.date.accessioned | 2023-12-06T02:41:20Z | - |
dc.date.available | 2023-12-06T02:41:20Z | - |
dc.date.created | 2023-12-04 | - |
dc.date.issued | 2023-01 | - |
dc.identifier.issn | 0020-1669 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/119456 | - |
dc.description.abstract | Three new cationic cyclometalated iridium(III) complexes equipped with differently substituted benzo[b]thiophen-2-ylquinoline cyclometalating ligands and with a sterically demanding tert-butyl-substituted 2,2′-bipyridine ancillary ligand were synthesized and structurally characterized by NMR and X-ray diffraction techniques. To tune the electronic properties of such complexes, the quinoline moiety of the cyclometalating ligands was kept pristine or equipped with electron-withdrawing phenyl and −CF3 substituents, leading to complexes 1, 2, and 3, respectively. A complete electrochemical and photophysical investigation, supported by density functional theory calculations, permits a deep understanding of their electronic properties. The emission of all complexes arises from ligand-centered triplet states in the spectral range between 625 and 950 nm, with excited-state lifetimes between 2.10 and 6.32 μs at 298 K. The unsubstituted complex (1) exhibits the most blue-shifted emission in polymeric matrix at 298 K (λmax = 667 nm, photoluminescence quantum yield (PLQY) = 0.25 and τ = 5.32 μs). The phenyl-substituted complex (2) displays the highest photoluminescent quantum yields (up to 0.30 in polymeric matrix), while the CF3-substituted counterpart (3) shows the most red-shifted emission, peaking at approx. 720 nm, but with lower quantum yields (e.g., 0.10 in polymeric matrix at 298 K). Complexes 1 and 2 were tested in single-layer nondoped light-emitting electrochemical cells (LEECs), using a nozzle-printing technique; both devices display deep-red electroluminescence with an external quantum efficiency close to 20%. © 2022 American Chemical Society. | - |
dc.language | English | - |
dc.publisher | American Chemical Society | - |
dc.relation.isPartOf | Inorganic Chemistry | - |
dc.title | Cationic Iridium(III) Complexes with Benzothiophene-Quinoline Ligands for Deep-Red Light-Emitting Electrochemical Cells | - |
dc.type | Article | - |
dc.identifier.doi | 10.1021/acs.inorgchem.2c02534 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Inorganic Chemistry, v.62, no.1, pp.43 - 55 | - |
dc.identifier.wosid | 000905035500001 | - |
dc.citation.endPage | 55 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 43 | - |
dc.citation.title | Inorganic Chemistry | - |
dc.citation.volume | 62 | - |
dc.contributor.affiliatedAuthor | Sohn, Sunyoung | - |
dc.contributor.affiliatedAuthor | Jung, Sungjune | - |
dc.contributor.affiliatedAuthor | Park, Taiho | - |
dc.identifier.scopusid | 2-s2.0-85144904390 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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