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. 2020 Apr 9;8:229. doi: 10.3389/fchem.2020.00229

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Copyright © 2020 Paisley, Tonge and Hudson.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Donor-acceptor TADF polymers; (B) films of 15–18 (from top to bottom); (C) illustration of pseudoaxial and pseudoequatorial conformers of phenothiazine and their respective emission wavelengths; (D) Stern-Volmer plot comparing the ratio of emission intensity at 516 nm to emission intensity at 396 nm (I₅₁₆/I₃₉₆) at various partial pressures of O₂ for a film of 16; (E) fluorescence emission response of 16 to O₂ concentration.