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. 2020 Jan 3;25(1):198. doi: 10.3390/molecules25010198

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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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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LUMO, LUMO + 1, and LUMO + 2 energy levels of chlorin dyes M2, M4, and M6. The values for the conduction band edge of the semiconductor calculated from a Ti₃₈O₇₆ cluster is added for comparison (dashed line).