Photocontrolled light‐harvesting supramolecular assembly with aggregation‐induced excimer emission is fabricated by polyanionic γ‐cyclodextrin (COONa‐γ‐CD), pyrene derivative (PYC12), Nile red (NiR), and diarylethene derivative (DAE) in aqueous solution. Benefiting from the COONa‐γ‐CD‐induced aggregation of PYC12, the fluorescence can be modulated from monomeric state to assembled state with a large red‐shift around 100 nm, which exhibits aggregation‐induced excimer emission enhancement and makes PYC12 a remarkable energy donor. Subsequently, NiR can function as energy acceptor loaded into PYC12/COONa‐γ‐CD supramolecular assembly, and highly efficient energy transfer process occurs from PYC12/COONa‐γ‐CD to NiR, with energy transfer efficiency up to 83% at donor/acceptor ratio of 160:1. Moreover, multicolor tunable emission can be achieved simply by tuning the molar ratios of donor and acceptor, notably including white‐light emission. Interestingly, loading photoresponsive energy acceptor DAE into PYC12/COONa‐γ‐CD/NiR assembly endows the light‐harvesting system with excellent photocontrolled energy transfer, and this process can be efficiently regulated upon distinct light irradiation.

中文翻译：

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基于聚集诱导的准分子发射的光控聚光超分子组装

由聚阴离子γ-环糊精（COONa-γ-CD），pyr衍生物（PYC12），尼罗红（NiR）和二芳基乙烯衍生物（DAE）制成具有聚集诱导的准分子发射的光控聚光超分子组装体。得益于COONa-γ-CD诱导的PYC12聚集，可以将荧光从单体状态调制为组装状态，并在100 nm附近发生大的红移，这显示出聚集诱导的准分子发射增强，并使PYC12成为了杰出的能量供体。随后，NiR可以用作装载到PYC12 /COONa-γ-CD超分子组装体中的能量受体，并且发生了从PYC12 /COONa-γ-CD到NiR的高效能量转移过程，供体/受体的能量转移效率高达83％比例为160：1。此外，只需调节供体和受体的摩尔比即可实现多色可调发射，特别是包括白光发射。有趣的是，将光响应能量受体DAE装入PYC12 /COONa-γ-CD/ NiR组件使光收集系统具有出色的光控能量传递，并且可以在不同的光照射下有效地调节此过程。