Beilstein J. Org. Chem.2016,12, 1925–1938, doi:10.3762/bjoc.12.182
substitution at the pyrrolic phenylacetylene moieties. The later complexes are expected to be stronger electron acceptors than Zn(WS3)2, and may enable charge transfer from other conjugated polymer donors that have lower energy levels than poly(3-hexylthiophene) (P3HT).
Keywords: dye; fluorine; near-IR
absorber; non-fullerene acceptor; zinc(II) complex; Introduction
Azadipyrromethenes (ADPs) (Figure 1a) are a class of monoanionic bidentate ligands with strong absorption in the visible and near IR range. Their absorbance and emission properties can be readily tuned through structural modifications and
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Graphical Abstract
Figure 1:
a) Azadipyrromethene ligand labeling positioning; b and c) chelates; d) estimated HOMO/LUMO energy ...