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abstracthelically chiral n , n , o , oboron chelated dipyrromethenes showed solutionphase circularly polarized luminescence ( cpl ) in the red region of the visible spectrum (  
 em(max ) from 621 to 663  nm ) . 
 the parent dipyrromethene is desymmetrised through o chelation of boron by the 3,5orthophenolic substituents , inducing a helical chirality in the fluorophore . 
 the combination of high luminescence dissymmetry factors ( |g 
 lum| up to 4.7 103 ) and fluorescence quantum yields (  
 f up to 0.73 ) gave exceptionally efficient circularly polarized red emission from these simple small organic fluorophores , enabling future application in cplbased bioimaging .