Dramatic expansion of bimodal redox window of indigo by two-electron redox processes.

ABSTRACT: Indigo is an extremely popular molecule in dye industry, however, its use in photochemical transformations is surprisingly scarce. This report explores its photocatalytic activity over an unusually wide excited-state redox window, spanning over 5.98 V. The dye molecule exhibits bimodality and proves itself as a simultaneous super-reductant and -oxidant. This extreme bimodal behavior in indigo (IndH₂) originates from the viability of two electron redox processes on the parent architecture. In comparison, major popular photocatalysts (PC) possess singly oxidized/reduced state, limiting the span of such bimodal redox window significantly. In the presence of KO^tBu and white light irradiation, IndH₂ is converted to its tetraanionic form Ind^4- by two-e

SUBMITTER: Roy M 

PROVIDER: S-EPMC12738839 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature