Steric effect on excimer formation in planar Pt(II) complexes
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cho, Y.-J. | - |
dc.contributor.author | Kim, S.-Y. | - |
dc.contributor.author | Son, H.-J. | - |
dc.contributor.author | Cho, D.W. | - |
dc.contributor.author | Kang, S.O. | - |
dc.date.accessioned | 2021-09-03T14:05:34Z | - |
dc.date.available | 2021-09-03T14:05:34Z | - |
dc.date.created | 2021-06-17 | - |
dc.date.issued | 2017 | - |
dc.identifier.issn | 1463-9076 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/86112 | - |
dc.description.abstract | In order to understand the steric influence on excimer formation in square planar metal complexes, three different Pt(ii) complexes were prepared by modifying the substituents in the main ligand: Pt(ii)(dfppy)(acac) (Pt-1, where dfppy is difluorophenylpyridine, acac is acetylacetonate); the bulky triphenyl silyl (Ph3Si-) group was substituted at the pyridine moiety (Pt-2) and at the phenyl moiety (Pt-3) of the main ligand of Pt-1. The Pt-complexes showed sky-blue emission at ∼460 nm. In addition, Pt-1 and Pt-3 showed excimer emission at ∼600 nm in the concentrated solution and the solid sample. The emission lifetimes and intensities for monomeric Pt-1 and Pt-3 showed strong concentration dependence. Indeed, the lifetime of the monomer was reduced in highly concentrated solutions due to excimer formation. The intrinsic emission lifetimes were determined as 364 ns (Pt-1) and 300 ns (Pt-3) by Stern-Volmer analysis, considering the self-quenched lifetime of monomer emission. Pt-2 did not show any excimer emission in the concentrated solution or solid sample. The crystal structures of Pt-1 and Pt-3 were analysed by X-ray crystallographic measurements. The results revealed that the LUMO moiety closely overlapped with that of another Pt-complex. In this study, based on the influence of steric hindrance of the bulky Ph3Si group, we concluded that the LUMO-LUMO interaction between the pyridine moieties of the main ligand is the main factor responsible for excimer formation. © the Owner Societies 2017. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | Royal Society of Chemistry | - |
dc.title | Steric effect on excimer formation in planar Pt(II) complexes | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Son, H.-J. | - |
dc.contributor.affiliatedAuthor | Cho, D.W. | - |
dc.contributor.affiliatedAuthor | Kang, S.O. | - |
dc.identifier.doi | 10.1039/c6cp08651a | - |
dc.identifier.scopusid | 2-s2.0-85018940928 | - |
dc.identifier.bibliographicCitation | Physical Chemistry Chemical Physics, v.19, no.7, pp.5486 - 5494 | - |
dc.relation.isPartOf | Physical Chemistry Chemical Physics | - |
dc.citation.title | Physical Chemistry Chemical Physics | - |
dc.citation.volume | 19 | - |
dc.citation.number | 7 | - |
dc.citation.startPage | 5486 | - |
dc.citation.endPage | 5494 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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