First triazole-bridged unsymmetrical porphyrin dyad via click chemistry

[GRAPHICS] Click chemistry has been successfully applied in the synthesis of the first example of a triazole-bridged porphyrin dyad containing N2S2 porphyrin and N-4 or ZnN4 porphyrin subunits, and fluorescence study indicated a possibility of singlet-singlet energy transfer from the N-4 or ZnN4 porphyrin subunit to the N2S2 porphyrin subunit.