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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
(a) Absolute and (b) Peak-normalized absorption spectra of fresh (black) and photodegraded (gray) CYV in acetonitrile. In the figure we focus on the modifications experienced by the charge-transfer band, those exhibited by the phenyl π-π transition band at 250 nm are similar.