Axial chiral binaphthalene-diketopyrrolopyrrole dyads as efficient far-red to near-infrared circularly polarized luminescent emitters

In this paper, two axial chiral binaphthalene-diketopyrrolopyrrole dyads were developed as far-red to near-infrared circularly polarized luminescent materials. The dyads were obtained by conjugating of enantiopure binaphthalene with diketopyrrolopyrrole. The obtained dyads exhibited intense circularly polarized luminescence across far-red to near-infrared with high quantum yields (41–43%) and moderate luminescence dissymmetry factors (4.5–5.8 × 10−4). The photophysical properties of these dyads were rationalized through electrochemical and theoretical studies. These results clearly demonstrated the integration of binaphthalene with far-red or near-infrared fluorophore as an efficient approach for the construction of chiral binaphthalene derivates with far-red or near-infrared circularly polarized luminescence.