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In these systems, two phosphoniums are connected through various PAHs backbones. The impact of \u03c0\u2010extension on both the optical and redox properties is investigated using a joint experimental (UV\/Vis absorption, fluorescence and cyclic voltammetry) and theoretical approach (TD\u2010DFT calculations). Finally, (spectro)\u2010electrochemical studies prove that these compounds possess three redox states and EPR studies confirm the in situ formation of an organic radical delocalized on the PAH backbone.<\/jats:p>","DOI":"10.1002\/chem.202001213","type":"journal-article","created":{"date-parts":[[2020,3,11]],"date-time":"2020-03-11T10:46:23Z","timestamp":1583923583000},"page":"8226-8229","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Multi\u2010Stage Redox Systems Based on Dicationic P\u2010Containing Polycyclic Aromatic Hydrocarbons"],"prefix":"10.1002","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5035-3010","authenticated-orcid":false,"given":"Thomas","family":"Delouche","sequence":"first","affiliation":[{"name":"CNRS, ISCR\u2014UMR 6226 Univ Rennes  35000 Rennes 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