Chirality induction in binuclear phthalocyanine tweezers

A novel binuclear phthalocyanine tweezers, in which two zinc-phthalocyanine rings are linked to an optically active binaphthyl group through triazolyl linkages, was self-cyclized through triazolyl-to-zinc coordination bonds. An axially chiral S-binaphthyl group induced planar chirality in a slipped-cofacial stack of phthalocyanine moieties, and therefore displayed fluorescence with a good quantum yield (ΦF = 0.23) and circularly polarized luminescence with a moderate intensity of dissymmetry factor (glum = −4 × 10−4) in the near-infrared wavelength region.

Graphical abstractDownload full-size image