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. 2020 Sep 26;10(10):1925. doi: 10.3390/nano10101925

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Fluorescence lifetime map of pristine nPCN-222 emission (630–750 nm) (same sample with Figure 5a. (b) Fluorescence lifetime map of acceptor emission of nPCN-BDP. (c) Fluorescence lifetime map of acceptor emission for nPCN-I₂BDP. The spatial position of (b,c) is same with Figure 6a,c, respectively. (d) Representative fluorescence lifetime decay curves of acceptor emission obtained at the locations indicated by arrows in (a–c) that represent pristine nPCN-222 (Black), acceptor emission for nPCN-BDP (blue) and for nPCN-I₂BDP (magenta).