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Article Dans Une Revue Organic Chemistry Frontiers Année : 2019

Conjugated Oligomers with Alternating Heterocycles from a Single Monomer: Synthesis and Demonstration of Electroluminescence

Résumé

Conjugated oligomers based on two different heterocycles are typically prepared by step growth polycondensation cross-coupling methods from two monomers X-Cycle1-X and M-Cycle2-M with no control of the regioselectivity. In this work, we used a new synthetic strategy that involves an extremely chemoselective reaction of a dielectrophilic compound, X1 Cycle1 X2, with a dinucleophilic component, M1-Cycle2-M2, under Stille conditions. The resulting monomers, X1 Cycle1 Cycle2-M2 are di-heterocyclic push pull monomers that still contain a nucleophilic site (boronic acid) and electrophilic site (bromide) and are set up for a controlled polymerization under Suzuki conditions. In this way, two semiconducting oligomers, based on thiophene / benzene and thiophene / pyridine motifs were synthesized. Both oligomers were characterized in terms of their, thermal, electrochemical, absorption, emission and electroluminescence properties.
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Dates et versions

hal-02293114 , version 1 (23-09-2019)

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Sara Urrego-Riveros, Matthias Bremer, Jonas Hoffmann, Anne Heitmann, Thibault Reynaldo, et al.. Conjugated Oligomers with Alternating Heterocycles from a Single Monomer: Synthesis and Demonstration of Electroluminescence. Organic Chemistry Frontiers, 2019, 6 (21), pp.3636-3643. ⟨10.1039/C9QO00947G⟩. ⟨hal-02293114⟩
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