Amplification of luminescence of stable radicals by coordination to NHC-gold(i) complex

The luminescence of stable radicals can be enhanced by coordination to metal complexes. The 4% fluorescence quantum yield of (3,5-difluoro-4-pyridyl)bis(2,4,6-trichlorophenyl)methyl radical (F2PyBTM) in dichloromethane was enhanced up to 36% by coordination to Au-I with N-heterocyclic carbene ligand, which is a record for metal-radical complexes.

Automated summary

The luminescence of stable radicals can be enhanced by coordination to metal complexes. The fluorescence quantum yield of F2PyBTM radical in dichloromethane was increased from 4% to 36% by coordination to Au-I metal complex with N-heterocyclic carbene ligand, setting a record for metal-radical complexes.