Abstract

A novel macrocyclic [Formula: see text]-skeleton 1 containing thiazole and thiophene rings was synthesized via MacDonald [3+1]-type condensation, and its optical properties were investigated. Two sulfur atoms were effective for the bathochromic shift of the ultraviolet-visible absorption bands in comparison with the traditional porphyrin and chlorin compounds. The characteristics of the absorption spectrum and the nucleus-independent chemical shift calculations show that the [Formula: see text]-skeleton 1 is the chlorin-type compound.

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