Two-dimensional benzo[1,2-b : 4,5-b′]difurans as donor building blocks for the formation of novel donor–acceptor copolymers

Abstract

In this work, two novel donor–acceptor copolymers comprising a two-dimensional benzodifuran monomer were synthesized. The impact of alkyl chain substitution and co-monomer electron accepting strength was investigated.

6H-[1,2,5]Thiadiazolo[3,4-e]thieno[3,2-b]indole-flanked para-azaquinodimethane based aromatic-quinoidal polymer semiconductors with high molecular weights synthesized via direct arylation polycondensation

“…18,19 The thiophene-flanked p-AQMs also exhibit distinct advantages of facile synthesis, ease of insertion into polymer backbones, and flexible band gap engineering. 20,21 The fused heteroaromatic conjugated materials have been widely proven to be promising semiconducting small molecules 22-28 and polymers [29][30][31][32][33] . As a linked unit in the conjugated polymer, replacing the single thiophene ring with the fused heteroaromatic ring endows the resulting polymer with tunable physicochemical and semiconducting properties.…”

“…20,21 The fused heteroaromatic conjugated materials have been widely proven to be promising semiconducting small molecules [22][23][24][25][26][27][28] and polymers. [29][30][31][32][33] As a linked unit in the conjugated polymer, replacing the single thiophene ring with the fused heteroaromatic ring endows the resulting polymer with tunable physicochemical and semiconducting properties. [34][35][36] For example, introducing the benzo[c] [1,2,5]thiadiazole unit into a thiopheneflanked p-AQM polymer backbone offers improved backbone rigidity, stronger intermolecular interactions, and higher crystallinity, endowing the resulting polymer with high hole transport mobility.…”