A Supramolecular Artificial Light‐Harvesting System with Two‐Step Sequential Energy Transfer for Photochemical Catalysis. Issue 25 (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 international edition. Volume 59:Issue 25(2020)
• Page Start: 10095
• Page End: 10100
• Publication Date: 2019-11-14
• Subjects: artificial light harvesting -- host–guest interactions -- sequential energy transfer -- supramolecular self-assembly -- white light emission; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201912654
• Languages: English
• ISSNs: 1433-7851

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 : It takes two to FRET : An artificial light‐harvesting system with a two‐step sequential energy‐transfer process in a relay mode was fabricated using a supramolecular strategy. It can be used as a nanoreactor for efficient photochemical catalysis. Moreover, bright white light emission can be successfully achieved with a CIE coordinate of (0.33, 0.33).