Enhanced circularly polarized emission of chiral dimer of π-conjugated perylene in opaque film

Absorption, CD and circularly polarized luminescence, CPL, of opaque film of a chiral fluorescent perylene derivative are studied. The aggregated state formed in the bulk film is responsible to characteristic optical dissymmetry with enhanced glum value, which was measured by an originally designed CPL measurement system. The fluorescence emission band characteristic for the aggregated π-stacked structure revealed specific CPL activity at wavelength range longer than that of the isolated molecules.