2017年4月1日
Thermally activated delayed fluorescent phenothiazine-dibenzo[a,j]phenazine-phenothiazine triads exhibiting tricolor-changing mechanochromic luminescence.
Chemical Science
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- 巻
- 8
- 号
- 4
- 開始ページ
- 2677
- 終了ページ
- 2686
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1039/c6sc04863c
- 出版者・発行元
- Royal Chemical Society (RSC)
Novel U-shaped donor-acceptor-donor (D-A-D) π-conjugated multi-functional molecules comprising dibenzo[a,j]phenazine (DBPHZ) as an acceptor and phenothiazines (PTZ) as donors have been developed. Most importantly, the D-A-D compounds exhibit not only distinct tricolor-changeable mechanochromic luminescence (MCL) properties but also efficient thermally activated delayed fluorescence (TADF). Quantum chemical calculations, X-ray diffraction analysis, and systematic studies on the photophysical properties indicated that the "two-conformation-switchable" PTZ units play a highly important role in achieving multi-color-changing MCL. Time-resolved photophysical measurements revealed that the developed D-A-D compounds also exhibit efficient orange-TADF. Furthermore, organic light-emitting diode (OLED) devices fabricated with the new TADF emitters have achieved high external quantum efficiencies (EQEs) up to 16.8%, which significantly exceeds the theoretical maximum (∼5%) of conventional fluorescent emitters.
- リンク情報
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- DOI
- https://doi.org/10.1039/c6sc04863c 本文へのリンクあり
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/28553504
- PubMed Central
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5433494
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000397560500023&DestApp=WOS_CPL
- ID情報
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- DOI : 10.1039/c6sc04863c
- ISSN : 2041-6520
- eISSN : 2041-6539
- PubMed ID : 28553504
- PubMed Central 記事ID : PMC5433494
- Web of Science ID : WOS:000397560500023