Generation of blue light-emitting zinc complexes by band-gap control of the oxazolyl phenolate ligand system: Syntheses, characterizations, and organic light emitting device applications of 4-coordinated bis(2-oxazolylphenolate) zinc(II) complexes
DC Field | Value | Language |
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dc.contributor.author | Son, Ho-Jin | - |
dc.contributor.author | Han, Won-Sik | - |
dc.contributor.author | Chun, Ji-Yun | - |
dc.contributor.author | Kang, Byoung-Kook | - |
dc.contributor.author | Kwon, Soon-Nam | - |
dc.contributor.author | Ko, Jaejung | - |
dc.contributor.author | Han, Su Jung | - |
dc.contributor.author | Lee, Chongmok | - |
dc.contributor.author | Kim, Sung Joo | - |
dc.contributor.author | Kang, Sang Ook | - |
dc.date.accessioned | 2021-09-09T05:59:14Z | - |
dc.date.available | 2021-09-09T05:59:14Z | - |
dc.date.created | 2021-06-10 | - |
dc.date.issued | 2008-07-07 | - |
dc.identifier.issn | 0020-1669 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/123030 | - |
dc.description.abstract | Color-tunable Zn(II) complexes of the type Zn(N,O-(OPhArX)-Ar-OxZ)(2) (5), where the ligand consists of an oxazolylphenolate ion connected at the 4-position by a 2,4-substituted aryl functional group with X = NMe2 a, OMe b, Ph c, Cl d, F-2 e, and CN f, were prepared. X-ray structural studies of 5a, 5b, and 5e showed that a zinc atom was positioned in a distorted tetrahedral coordination environment created by two oxazolylphenolate ligands with N,O-chelation. Hammet plots of absorption and emission maxima, respectively, in UV and photoluminescence (PL) spectra with respect to electron-donating and electron-withdrawing groups of the substituents indicate a direct correlation between the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) band gaps and electronic alterations at the ligand sites. A similar correlation was also observed for the reduction and oxidation potentials in cyclic voltammograms (CVs). A gradual increase in the HOMO-LUMO band gap is seen from electron-donating to electron-withdrawing functional groups, NMe2 < OMe < Ph < Cl < F-2 < CN. An emission peak with a maximum at 455 nm was achieved when the most electron-withdrawing group (cyano) was applied to the oxazolylphenolate ligand system. Density-functional theory (DFT) calculations on the HOMOs and LUMOs for this series lead to a conclusion similar to that arrived at from a blue-shift trend observed in UV data and trends in the CVs. The 4-coordinated zinc complex (5c) was shown to be a potential blue-emitting material, exhibiting a maximum efficiency of 1720 cd/m(2) at 17 V with 0.3 cd/A in a multilayered device structure of ITO/NPB/5c/BCP/Alq(3)/LiF/Al. On the basis of the low HOMO level of this series, 5a was tested as a hole-transporting material; this resulted in the successful fabrication of a multilayered device of ITO/5a/DPVBI/Alq(3)LiF/Al with an efficiency of 7000 cd/m(2) at 13 V with 2.0 cd/A. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | ELECTROLUMINESCENT DEVICES | - |
dc.subject | CU(I) COMPLEXES | - |
dc.subject | PHOTOPHYSICAL PROPERTIES | - |
dc.subject | LUMINESCENT PROPERTIES | - |
dc.subject | SUBSTITUTED ALUMINUM | - |
dc.subject | OPTICAL-PROPERTIES | - |
dc.subject | ELECTRONIC STATES | - |
dc.subject | METAL-COMPLEXES | - |
dc.subject | EXCITED-STATE | - |
dc.subject | DIODES | - |
dc.title | Generation of blue light-emitting zinc complexes by band-gap control of the oxazolyl phenolate ligand system: Syntheses, characterizations, and organic light emitting device applications of 4-coordinated bis(2-oxazolylphenolate) zinc(II) complexes | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Ko, Jaejung | - |
dc.contributor.affiliatedAuthor | Kang, Sang Ook | - |
dc.identifier.doi | 10.1021/ic702491j | - |
dc.identifier.wosid | 000257278000029 | - |
dc.identifier.bibliographicCitation | INORGANIC CHEMISTRY, v.47, no.13, pp.5666 - 5676 | - |
dc.relation.isPartOf | INORGANIC CHEMISTRY | - |
dc.citation.title | INORGANIC CHEMISTRY | - |
dc.citation.volume | 47 | - |
dc.citation.number | 13 | - |
dc.citation.startPage | 5666 | - |
dc.citation.endPage | 5676 | - |
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 | ELECTROLUMINESCENT DEVICES | - |
dc.subject.keywordPlus | CU(I) COMPLEXES | - |
dc.subject.keywordPlus | PHOTOPHYSICAL PROPERTIES | - |
dc.subject.keywordPlus | LUMINESCENT PROPERTIES | - |
dc.subject.keywordPlus | SUBSTITUTED ALUMINUM | - |
dc.subject.keywordPlus | OPTICAL-PROPERTIES | - |
dc.subject.keywordPlus | ELECTRONIC STATES | - |
dc.subject.keywordPlus | METAL-COMPLEXES | - |
dc.subject.keywordPlus | EXCITED-STATE | - |
dc.subject.keywordPlus | DIODES | - |
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