Design and synthesis of β-Pyrrole functionalized push-pull porphyrins

Abstract

Porphyrins are aromatic tetrapyrrolic macrocycle, composed of four pyrrole rings and four bridging methine carbon atoms, exhibits a planar conformation (Figure 1). Porphyrin macrocycle undergoes peripheral functionalization at the four meso positions of the methine bridges and eight β-positions on the pyrrolic rings. Porphyrin exhibits two characteristic absorption band, Soret band and the Q-band around 400– 700 nm in the visible region. The photonic and electronic properties of the porphyrin macrocycle can be tuned by peripheral functionalization. Porphyrin derivatives have been used in various applications such as, photosynthesis, organic photovoltaic, P450-related biocatalysts, bioimaging probes, photodynamic therapeutic agents, chemosensors, information storage, light emitting materials, conductive organic materials, near-infrared dyes, molecular wires, nonlinear optical materials, supramolecules, metal ligands and many more.