Click chemistry has been successfully applied in the synthesis of the first example of a triazole-bridged porphyrin dyad containing N(2)S(2) porphyrin and N(4) or ZnN(4) porphyrin subunits, and fluorescence study indicated a possibility of singlet-singlet energy transfer from the N(4) or ZnN(4) porphyrin subunit to the N(20S(2) porphyrin subunit.
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Punidha et al. (2007) studied this question.
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