2022/03/23 by Clément Roizard, Roizard, Clément, Vivien Andrieux +17
Chemistry · Materials Science · #FOS: Physical sciences #Molecular Sensors and Ion Detection #Porphyrin and Phthalocyanine Chemistry #Soft Condensed Matter (cond-mat.soft) #Supramolecular Chemistry and Complexes
paper · pdf · doi:10.48550/arxiv.2203.12508
openalex publication_date 2022/03/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Viologen-based ditopic bis-pyridinyl-triazole bidentate ligands self-assemble in the presence of palladium ions into supramolecular polymers whose structure is imposed by the directed formation of coordination bonds. Light-irradiation of these electron-responsive supramolecular materials triggers a photo-induced electron transfer yielding isolated π-radicals and dimers of radicals. The photoreduction events and the associated dimerization steps trigger a large-scale reorganization occurring within the supramolecular network yielding aggregates or gels depending on the irradiation conditions (power, duration). Detailed electrochemical, spectro-electrochemical and photochemical analyses were conducted to understand the mechanisms at stakes in these light-induced aggregation and gelation.