Abstract
Abstract An oxacalix[2]arene[2]pyrimidine-bis(Zn II -porphyrin) conjugate was readily prepared via nucleophilic aromatic substitution of a phenolic AB 3 -Zn-porphyrin on the upper rim of a ( 1,3-alternate ) 5,17-bis(methylsulfonyl)oxacalix[4]arene precursor. Efficient 1:1 complex formation between the ‘jaws’ bisporphyrin tweezer and fullerene C 70 was evidenced by 1 H NMR titrations ( K = 3.0 × 10 4 M −1 ), while no detectable complexation could be observed with C 60 . On the other hand, an analogous oxacalix[4]arene-bis(Cu-corrole) conjugate did not show any measurable (C 60 or C 70 ) fullerene binding.
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