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Hokkaido University Collection of Scholarly and Academic Papers >
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Aromatic versus Aliphatic alpha-Diimine Ligands in Heteroleptic Copper(I) Emitters: Photophysical and Electrochemical Properties
| Title: | Aromatic versus Aliphatic alpha-Diimine Ligands in Heteroleptic Copper(I) Emitters: Photophysical and Electrochemical Properties |
| Authors: | Yoshida, Masaki Browse this author →KAKEN DB | | Yanagida, Sae Browse this author | | Saito, Daisuke Browse this author | | Kobayashi, Atsushi Browse this author →KAKEN DB | | Kato, Masako Browse this author →KAKEN DB |
| Keywords: | Copper(I) complexes | | luminescent materials | | ligand-centered redox behavior | | diimine ligands |
| Issue Date: | Jan-2020 |
| Publisher: | 日本分析化学会（Japan Society for Analytical Chemistry） |
| Journal Title: | Analytical sciences |
| Volume: | 36 |
| Issue: | 1 |
| Start Page: | 67 |
| End Page: | 73 |
| Abstract: | The electrochemical and photophysical properties of a heteroleptic Cu(I) complex bearing an aliphatic alpha-diimine ligand, [Cu(dab)(xantphos)](+) (Cu-dab; dab = N,N'-diphenyl-2,3-dimethyl-1,4-diazabutadiene, xantphos = 4,5-bis(diphenyl-phosphino)-9,9-dimethylxanthene), were evaluated together with those of complexes [Cu(dmp)(xantphos)](+) (Cu-dmp; dmp = 2,9-dimethyl-1,10-phenanthroline), [Cu(dmbpy)(xantphos)](+) (Cu-dmbpy; dmbpy = 5,5'-dimethyl-2,2'-bipyridine), and [Cu(bq)(xantphos)](+) (Cu-bq; bq = 2,2'-biquinoline), bearing aromatic diimine ligands. Cu-dab exhibited a two-step ligand-centered redox behavior, where the first wave corresponded to an electrochemically reversible one-electron reduction process. Although Cu(I)-aromatic diimine complexes Cu-dmp, Cu-dmbpy, and Cu-bq exhibited obvious luminescence from the metal-to-ligand charge transfer (MLCT) excited state, Cu-dab did not show any luminescence. Computational studies indicated that this non-luminescent property was caused by the large structural relaxation of Cu-dab during photoexcitation. |
| Publisher URI: | https://www.jstage.jst.go.jp/article/analsci/advpub/0/advpub_19SAP07/_article/-char/ja/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/76955 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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