meso-2′-Linked porphyrin–BODIPY hybrids: synthesis and efficient excitation energy transfer

Abstract

Three meso-2′-linked porphyrin–BODIPY hybrids which contain one, two, and four BODIPY units (BDP–ZnP, 2BDP–ZnP, and 4BDP–ZnP), respectively, were synthesized. Their photophysical properties were investigated by UV-vis and fluorescence spectroscopy, cyclic voltammetry, and femtosecond transient absorption spectroscopy, as well as by theoretical calculations. The electronic properties of the constituent chromophores were found to be largely retained in these hybrids. Meanwhile, efficient and rapid energy transfers from ¹BDP* to ZnP were evaluated to be 1.2 × 10¹¹, 1.5 × 10¹¹, and 1.1 × 10¹¹ s⁻¹, respectively.