Synthesis of Composite Molecules of a Co4O4 Cubane Complex and Perylenediimide Moieties.

Composite molecules consisting of one Co 4 O 4 cubane complex and two perylenediimide moieties were synthesized. The cyclic voltammogram of the molecule exhibited reversible redox waves for oxidation of Co 4 O 4 complex and two-stage reduction of the perylenediimide moieties. The emission spectrum in a solution revealed strongly quenched fluorescence of perylenediimide, which suggests intramolecular electron transfer from Co 4 O 4 to the excited perylenediimide. The approach presented here will be a valuable guide for the synthesis of organic/inorganic hybrid molecules, which should open a new field of unexplored molecular materials.