A novel method for the preparation of β-fused porphyrin dyads was developed that exploits a one-pot reaction of 2,3-diaminoporphyrins with diethyl oxalate. This approach provides good yields of the zinc β-fused dyad and the corresponding free-base, opening the way for preparation of several metal derivatives to permit modulation of optoelectronic characteristics for commercial applications.
Keywords: 2,3-Diaminoporphyrin; DSSC; Dietyl oxalate; Porphyrin dyad electrochemistry; α-dione porphyrin; β-fused-porphyrin.