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A platform is described for the first time for the facile synthesis of oligo‐ and polythiophene‐S‐oxides and the corresponding ‐S,S‐dioxides in short times, mild conditions, high yields. Employing ultrasound assistance, brominated thiophenes are selectively mono‐ or dioxygenated at room temperature. These building blocks are then combined with metalated thiophenes via microwave‐assisted cross‐coupling reactions through a “Lego‐like” strategy to afford unprecedented oligo/polythiophene‐S‐oxides and mixed ‐S‐oxides/‐S,S‐dioxides. It is demonstrated that depending on the number, type, and sequence alternation of nonoxygenated, monooxygenated, and dioxygenated thiophene units a very wide property–function tuning can be achieved spanning from frontier orbital energies and energy gaps, to charge transport characteristics and supramolecular H‐bonding interactions with specific proteins inside live cells.
Publication date: 
1 Oct 2016

Francesca Di Maria, Mattia Zangoli, Ilaria Elena Palamá, Eduardo Fabiano, Alberto Zanelli, Magda Monari, Andrea Perinot, Mario Caironi, Vincenzo Maiorano, Antonio Maggiore, Marco Pugliese, Elisabetta Salatelli, Giuseppe Gigli, Ilenia Viola, Giovanna Barbarella

Biblio References: 
Volume: 26 Issue: 38 Pages: 6970-6984
Advanced Functional Materials