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Front Cover: Supramolecular Crowding Can Avoid Oxygen Quenching of Photon Upconversion in Water (Chem. Eur. J. 24/2019)
Author(s) -
Kouno Hironori,
Sasaki Yoichi,
Yanai Nobuhiro,
Kimizuka Nobuo
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201900794
Subject(s) - photon upconversion , front cover , oxygen , photochemistry , chemistry , supramolecular chemistry , quenching (fluorescence) , ion , acceptor , cationic polymerization , cover (algebra) , molecule , polymer chemistry , fluorescence , optics , physics , organic chemistry , mechanical engineering , engineering , condensed matter physics
Air‐stable, triplet‐triplet annihilation‐based photon upconversion (TTA‐UC) has been achieved in water by reinforcing cationic acceptor self‐assemblies with fatty acid anions. More than 70% of the TTA‐UC emission is maintained in air‐saturated water, indicating that the supramolecular crowding by ion‐paring provided a physical barrier to the partition of dissolved oxygen to the self‐assembled chromophores. More information can be found in the Full Paper by N. Yanai, N. Kimizuka, et al. on page 6124.