Photophysical properties of boron-dipyrrin appended porphyrins with heteroatom cores

Abstract

The photophysical properties of porphyrins with N₃S and N₃O cores appended with two boron-dipyrrin units and porphyrins with N₂S₂ and N₄ cores appended with four boron-dipyrrin units are described. The steady-state fluorescence measurements indicate that the energy transfer from boron-dipyrrin units to the porphyrin unit is efficient with N₄ and N₃O porphyrin cores and less efficient with N₃S and N₂S₂ cores. The energy transfer rates calculated from lifetime measurements are also in support with these observations.