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. 2018 Sep 1;23(9):2229. doi: 10.3390/molecules23092229

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© 2018 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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(top) Photograph of separate solutions containing free squaraine or macrocycle complex in H₂O. Absorption (bottom left) and emission (bottom right) maxima for separate solutions containing squaraine or macrocycle complex in water.