Electrofluorochromic Device Based on a Redox-Active Europium(III) Complex

Kim, Yuna; Ohmagari, Hitomi; Saso, Akira; Tamaoki, Nobuyuki; Hasegawa, Miki

Electrofluorochromic Device Based on a Redox-Active Europium(III) Complex

Kim, Yuna; Ohmagari, Hitomi; Saso, Akira et al.

ACS applied materials & interfaces, 2020, 12(41), 46390-46396

Permalink : https://hdl.handle.net/2115/82937

このアイテムのアクセス数:414件（2026-08-13 06:48 集計）

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/82937
タイトル	Electrofluorochromic Device Based on a Redox-Active Europium(III) Complex
著者	Kim, Yuna ; Ohmagari, Hitomi ; Saso, Akira ; Tamaoki, Nobuyuki ; Hasegawa, Miki
e-Rad_Researcher 00648131 著者名 Kim, Yuna
著者名 Ohmagari, Hitomi
著者名 Saso, Akira
e-Rad_Researcher 00344218 著者名 Tamaoki, Nobuyuki
著者名 Hasegawa, Miki
言語	英語
キーワード	electrofluorochromism
	europium complex
	redox-active
	ionic liquid
	electrochemical luminescence switching
	electrofluorochromic device
発行日	2020-10-14
出版者	American Chemical Society
収録物名	ACS applied materials & interfaces
巻(号)	12(41)
ページ	46390-46396
抄録	Electrofluorochromism owing to redox reactions on the center europium (Eu) ion in ionic liquids is examined for the helicate complexes (abbreviated as EuL) with a hexadentate pyridine derivative. Typical electrofluorochromism requires extra electroactive units complementing intra- or intermolecular energy transfer to quench fluorophores. Herein, an unprecedentedly simplified electrofluorochromic system overcoming such issues is demonstrated by utilizing reversible electrochemistry of EuL between Eu3+ and Eu2+, which accompanies large emission transition. A three-electrode electrochemical switching device is facilely prepared with an ionic liquid [BMIM] [PF6] and EuL mixture. Benefiting from the stable helical coordinated structure of the ligand in [BMW] [PF6], highly enhanced red fluorescence of EuL with small quantity (<= 1 wt %) is utilized. Rapid response and large contrast of luminescence are achieved: the emission is drastically quenched at the reduced state (Eu2+) and it is successfully restored by subsequent oxidation (Eu3+) The reversible fluctuation of excitation and emission spectra of an electrofluorochromic device is achieved in the potential window within +/- 2 V. The device affords excellent optoelectric properties in terms of well-controlled luminescence switching depending on the applied potentials and its durability. This work paves an efficient and smart way toward Eu luminescence control in optoelectronic devices.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsami.0c13765 .
PISSN	1944-8244
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1021/acsami.0c13765