Abstract
Electrochemical characterization was made of a dual porphyrin system built on a calix[4]arene spacer and that of a porphyrin monomer. The porphyrin dimer showed marked affinity toward 1,4-diazobicyclo[2.2.2]octane (DABCO) such as that of molecular tweezers and reacted strongly with large interactions in the ground state as indicated by electrochemical behavior. Compared to the monomeric porphyrin, the initial oxidation potentials for this dimer were significantly reduced and reoxidation occurred in two distinct redox steps.
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