Tunable emission from doped 1,3,5-triphenyl-2-pyrazoline organic nanoparticles

Tunable fluorescence emission from blue to red (see Figure) is exhibited by nanoparticles of 1,3,5-triphenyl-2-pyrazoline (TPP) doped with 4-(dicyano-methylene)-2-methyl-6-(p-dimethyl-aminostyryl)-4H-pyran (DCM); the emission is found to be dependent on the amount of DCM dopant used. Efficient energy transfer is also shown to occur between TPP and DCM molecules.