BAr<sub>2</sub>‐Bridged Azafulvene Dimers with Tunable Energy Levels for Photostable Near‐Infrared Dyes
書誌事項
- タイトル別名
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- BAr₂‐bridged Azafulvene Dimers with Tunable Energy Levels for Photostable Near‐infrared Dyes
抄録
Organic dyes with strong absorption in the near-infrared (NIR) region are potentially useful in medical applications, such as tumor imaging and photothermal therapy. In this work, new NIR dyes combining BAr₂-bridged azafulvene dimer acceptors with diarylaminothienyl donors in a donor–acceptor–donor configuration were synthesized. Surprisingly, it was found that in these molecules the BAr₂-bridged azafulvene acceptor adopts a 5-membered, rather than 6-membered ring structure. The influence of the aryl substituents on the HOMO and LUMO energy levels of the dye compounds was assessed from electrochemical and optical measurements. Strong electron-withdrawing fluorinated substituents (Ar=C₆F₅, 3, 5-(CF₃)₂C₆H₃) lowered the HOMO energy while preserving the small HOMO–LUMO energy gap, resulting in promising NIR dye molecules that combine strong absorption bands centered around 900 nm with good photostability.
収録刊行物
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- Chemistry – A European Journal
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Chemistry – A European Journal 29 (34), 2023-06-19
Wiley
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詳細情報 詳細情報について
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- CRID
- 1050578283037499776
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- ISSN
- 15213765
- 09476539
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- HANDLE
- 2433/284120
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB
- Crossref
- KAKEN