2024
DOI: 10.1002/cbic.202400401
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A Metastable Semiquinone Molecular Switch Modulated by Ascorbate/O2: A Study from a System Far‐From‐Equilibrium to Biological Assays in Mitochondria

Gabriela Rodríguez‐Valdez,
Marlen E. Martínez‐Cerda,
Jisell G. Mejía‐Reyes
et al.

Abstract: A molecular switch based on the metastable radical anion derived from a substituted heteroaryl quinone is described. Pyrrolil quinone thiocyanate (PQ 5) showed an interaction with the fluoride anion that was visible to the naked eye and quantified by UV/vis and 1H and 13C NMR. The metastable quinoid species formed by the interaction with F‐ ("ON" state) showed a molecular switching effect autocontrolled by the presence of ascorbate ("OFF" state) and back to the "ON" state by an autooxidation process, measured … Show more

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