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. 2014 Oct 10;19(10):16291–16311. doi: 10.3390/molecules191016291

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© 2014 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 license (http://creativecommons.org/licenses/by/4.0/).

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Scheme 10 — Proposed mechanism for singly O-atom incorporation in the photocatalytic cleavage of catechol by TiO₂. (a) intradiol cleavage via the anchored DTBC radicals active dioxygen at the step or edge, (b) extradiol cleavage via Ti-sites active dioxygen on the corner [53].