Strong circularly polarized luminescence of an octahedral chromium(iii) complex

Abstract

The chiral spin–flip luminophore [Cr(ddpd)₂]³⁺ can be resolved into enantiopure material by chiral HPLC. The corresponding enantiomers show very high luminescence dissymmetry factors of up to ∣g_lum ∣≈ 0.093 in circularly polarized luminescence (CPL) measurements for the “ruby-like” phosphorescence transition ²E/²T₁ → ⁴A₂ in the near-IR region around λ ≈ 775 nm.