Conjugated polymers containing diketopyrrolopyrrole units in the main chain

• Bernd Tieke,
• A. Raman Rabindranath,
• Kai Zhang and
• Yu Zhu

Beilstein J. Org. Chem. 2010, 6, 830–845, doi:10.3762/bjoc.6.92

• monomer (Figure 4). The same coupling reaction of M-4 resulted in polymer P-22, its π-conjugation being interrupted at the N-lactam units. Consequently, the absorption and emission behaviour were not much different from the corresponding monomer, the band gaps of the two isomers being 2 and 2.3 eV