A Supramolecular Artificial Light‐Harvesting System with Two‐Step Sequential Energy Transfer for Photochemical Catalysis. (14th November 2019)

• Record Type: Journal Article
• Authors: Hao, Min; Sun, Guangping; Zuo, Minzan; Xu, Zuqiang; Chen, Yuan; Hu, Xiao‐Yu; Wang, Leyong
• Is Part Of: Angewandte Chemie. Volume 132:Number 25(2020)
• Page Start: 10181
• Page End: 10186
• Publication Date: 2019-11-14
• Subjects: Weißlichtemission -- Künstliche Lichternte -- Sequenzieller Energietransfer -- Supramolekulare Selbstorganisation -- Wirt-Gast-Wechselwirkungen; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201912654
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: An artificial light‐harvesting system with sequential energy‐transfer process was fabricated based on a supramolecular strategy. Self‐assembled from the host–guest complex formed by water‐soluble pillar[5]arene (WP5), a bola‐type tetraphenylethylene‐functionalized dialkyl ammonium derivative (TPEDA), and two fluorescent dyes, Eosin Y (ESY) and Nile Red (NiR), the supramolecular vesicles achieve efficient energy transfer from the AIE guest TPEDA to ESY. ESY can function as a relay to further transfer the energy to the second acceptor NiR and realize a two‐step sequential energy‐transfer process with good efficiency. By tuning the donor/acceptor ratio, bright white light emission can be successfully achieved with a CIE coordinate of (0.33, 0.33). To better mimic natural photosynthesis and make full use of the harvested energy, the WP5⊃TPEDA‐ESY‐NiR system can be utilized as a nanoreactor: photocatalyzed dehalogenation of α‐bromoacetophenone was realized with 96 % yield in aqueous medium. Abstract : Sammelauftrag : Ein künstliches Lichtsammelsystem mit einem zweistufigen sequenziellen Energietransferprozess im Relais‐Modus wurde durch eine supramolekulare Strategie hergestellt. Es kann als Nanoreaktor für effiziente photochemische Katalyse genutzt werden und zeigt eine helle Weißlicht‐Emission mit einer CIE‐Koordinate von (0.33, 0.33).