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. Author manuscript; available in PMC: 2023 Oct 2.
Published in final edited form as: Front Chem Sci Eng. 2020 Jan 8;14(1):19–27. doi: 10.1007/s11705-019-1888-y

Fig. 1.

Fig. 1

The reduced form of texaphyrin, referred to as sp3-Tex (1), is red. It turns green upon metalation and concomitant oxidation. This color change results from the aromatization of the initial ligand (left) to produce the corresponding metal complex 2 (right).