Synthesis of bromo- and iodo-substituted pyromellitic diimide-based [2+2]- and [3+3]macrocycles, and their absorption spectra and electrochemical and inclusion properties

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Abstract New pyromellitic diimide-based tetrabromo[2+2]macrocycle ([2+2]MC) 2, tribromo- and hexabromo[3+3]MCs 3a and 3b, as well as triiodo[3+3]MC 3c were synthesized as structural units of covalently bound nanotubes, and their absorption spectra and redox properties, as well as inclusion phenomena of the [2+2]MC 2 were reported. Tetrabromo[2+2]MC 2 forms a 1:1 inclusion complex with toluene, whose structure was revealed by X-ray structural analysis.

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