Carborane Dyads for Photoinduced Electron Transfer: Photophysical Studies on Carbazole and Phenyl-o-carborane Molecular Assemblies
DC Field | Value | Language |
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dc.contributor.author | Kwon, Soonnam | - |
dc.contributor.author | Wee, Kyung-Ryang | - |
dc.contributor.author | Cho, Yang-Jin | - |
dc.contributor.author | Kang, Sang Ook | - |
dc.date.accessioned | 2021-09-05T08:53:50Z | - |
dc.date.available | 2021-09-05T08:53:50Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2014-05-12 | - |
dc.identifier.issn | 0947-6539 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/98523 | - |
dc.description.abstract | o-Carborane-based donor-acceptor dyads comprising an o-carboranyl phenyl unit combined with N-carbazole (1) or 4-phenyl-N-carbazole (2) were prepared, and their dyad characters were confirmed by steady-state photochemistry and photodynamic experiments as well as electrochemical studies. The absorption and electrochemical properties of the dyads were essentially the sum of those of the carbazole and o-carboranyl phenyl units; this indicates negligible interaction between the carbazole and o-carborane units in the ground state. However, the emission spectra of 1 and 2 indicated that carbazole fluorescence was effectively quenched and a new charge-transfer (CT) emission was observed in solvents, varying from hexane to acetonitrile, which exhibited large Stoke shifts. The CT emission properties of o-carborane-based dyads were further analyzed by using Lippert-Mataga plots to show that unit charge separation occurred to form a charge-separated species in the excited state, namely, 12. This excited-state species was confirmed by nanosecond transient absorption spectra and spectroelectrochemical measurements; the photoexcitation of carbazole generated the CT state in which a radical cation and anion were formed at the carbazole and o-carborane units, respectively, within a few nanoseconds. DFT calculations corroborated the presence of this CT species and showed localized populations of the highest singly occupied molecular orbital on 2 in the reduced anionic state. As a result, molecular assemblies formed by linking the carbazole group with the o-carborane cage through a phenylene or multi-phenylene spacer revealed that the photoinduced electron-transfer process occurred intramolecularly. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | WILEY-V C H VERLAG GMBH | - |
dc.subject | AGGREGATION-INDUCED EMISSION | - |
dc.subject | ICOSAHEDRAL CARBORANES | - |
dc.subject | POLY(N-VINYLCARBAZOLE) | - |
dc.subject | PHOTOLUMINESCENT | - |
dc.subject | PHOTOCHEMISTRY | - |
dc.subject | DENDRIMERS | - |
dc.subject | CHEMISTRY | - |
dc.subject | C2B10H12 | - |
dc.subject | ACCEPTOR | - |
dc.subject | POLYMER | - |
dc.title | Carborane Dyads for Photoinduced Electron Transfer: Photophysical Studies on Carbazole and Phenyl-o-carborane Molecular Assemblies | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kang, Sang Ook | - |
dc.identifier.doi | 10.1002/chem.201304474 | - |
dc.identifier.scopusid | 2-s2.0-84900011084 | - |
dc.identifier.wosid | 000335433500014 | - |
dc.identifier.bibliographicCitation | CHEMISTRY-A EUROPEAN JOURNAL, v.20, no.20, pp.5953 - 5960 | - |
dc.relation.isPartOf | CHEMISTRY-A EUROPEAN JOURNAL | - |
dc.citation.title | CHEMISTRY-A EUROPEAN JOURNAL | - |
dc.citation.volume | 20 | - |
dc.citation.number | 20 | - |
dc.citation.startPage | 5953 | - |
dc.citation.endPage | 5960 | - |
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, Multidisciplinary | - |
dc.subject.keywordPlus | AGGREGATION-INDUCED EMISSION | - |
dc.subject.keywordPlus | ICOSAHEDRAL CARBORANES | - |
dc.subject.keywordPlus | POLY(N-VINYLCARBAZOLE) | - |
dc.subject.keywordPlus | PHOTOLUMINESCENT | - |
dc.subject.keywordPlus | PHOTOCHEMISTRY | - |
dc.subject.keywordPlus | DENDRIMERS | - |
dc.subject.keywordPlus | CHEMISTRY | - |
dc.subject.keywordPlus | C2B10H12 | - |
dc.subject.keywordPlus | ACCEPTOR | - |
dc.subject.keywordPlus | POLYMER | - |
dc.subject.keywordAuthor | carboranes | - |
dc.subject.keywordAuthor | charge transfer | - |
dc.subject.keywordAuthor | donor-acceptor systems | - |
dc.subject.keywordAuthor | electron transfer | - |
dc.subject.keywordAuthor | photochemistry | - |
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