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- W2912945074 abstract "A common challenge in chemistry that deals with photoexcited states is to avoid oxygen quenching. This is crucial for hot research fields such as photon upconversion (UC), in which oxygen-sensitive triplet excited states play pivotal roles. However, methods to avoid oxygen quenching in aqueous media are far more limited despite eagerly anticipated catalytic and biological applications. This work introduces a simple strategy to achieve air-stable triplet–triplet annihilation (TTA)-based UC in water, namely, supramolecular crowding. Amphiphilic cationic acceptor molecules and anions with long alkyl chains co-assemble in water in which hydrophobic donor molecules are molecularly dispersed. Despite the common notion that oxygen molecules diffuse readily across hydrophobic domains in water, more than 80 % of the TTA-UC emission of the obtained hydrophobic co-assemblies is maintained in air-saturated water. This work demonstrates the new promising potential of supramolecular chemistry for photophysical and photochemical functions with oxygen-sensitive species." @default.
- W2912945074 created "2019-02-21" @default.
- W2912945074 creator A5053242657 @default.
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- W2912945074 date "2019-03-20" @default.
- W2912945074 modified "2023-10-16" @default.
- W2912945074 title "Supramolecular Crowding Can Avoid Oxygen Quenching of Photon Upconversion in Water" @default.
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- W2912945074 doi "https://doi.org/10.1002/chem.201806076" @default.
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