Three Redox States of a Diradical Acceptor–Donor–Acceptor Triad: Gating the Magnetic Coupling and the Electron Delocalization

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• 作者：Manuel Souto ; Vega Lloveras ; Sergi Vela ; Maria Fumanal ; Imma Ratera ; Jaume Veciana
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2016
• 出版时间：June 16, 2016
• 年：2016
• 卷：7
• 期：12
• 页码：2234-2239
• 全文大小：376K
• 年卷期：0
• ISSN：1948-7185

文摘

The diradical acceptor–donor–acceptor triad 1^••, based on two polychlorotriphenylmethyl (PTM) radicals connected through a tetrathiafulvalene(TTF)–vinylene bridge, has been synthesized. The generation of the mixed-valence radical anion, 1^•–, and triradical cation species, 1^•••+, obtained upon electrochemical reduction and oxidation, respectively, was monitored by optical and ESR spectroscopy. Interestingly, the modification of electron delocalization and magnetic coupling was observed when the charged species were generated and the changes have been rationalized by theoretical calculations.