Non-classical Circularly Polarized Luminescence of Organic and Organometallic Luminophores
Yoshitane Imai
Abstract
Circularly polarized luminescence (CPL) has attracted significant attention in the fields of chiral photonics and optoelectronic materials science. In a CPL-emitting system, a chiral luminophore derived from chiral molecules is usually essential, and a pair of enantiomeric luminophores is indispensable for the typical selective-emission of right- and left-handed CPL. This review focuses on non-classical CPL systems that do not use pairs of enantiomers and introduces symmetry-breaking CPL systems that do not use optically active molecules, and covers photoexcited chiral-switching, spontaneous-resolution, cryptochirality, and magnetic CPL. Non-classical circularly polarized luminescence (NC-CPL) system is a method that uses no pair of enantiomeric molecules and symmetry-breaking CPL (SB-CPL) system is a method that uses no optically active molecules. These NC-CPL and SB-CPL systems produce photoexcited chiral-switching, spontaneous-resolution, cryptochiral, and magnetic CPL.