Bambusuril as a One-Electron Donor for Photoinduced Electron Transfer to Methyl Viologen in Mixed Crystals

Vladimir Sindelar, Lucie Ludvíková, Michal Babiak, Petr Klán, Dominik Heger, Tomas Fiala, Jan Švec, Tomáš Slanina, L’ubica Vetráková, Marek Nečas & Petr Kulhánek
Methyl viologen hexafluorophosphate (MV2+·2PF6–) and dodecamethylbambus[6]uril (BU6) form crystals in which the layers of viologen dications alternate with those of a 1:2 supramolecular complex of BU6 and PF6–. This arrangement allows for a one-electron reduction of MV2+ ions upon UV irradiation to form MV+• radical cations within the crystal structure with half-lives of several hours in air. The mechanism of this photoinduced electron transfer in the solid state and the origin of the long-lived charge-separated...
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