Yuichiro Yokoyama, Daisuke Sakamaki, Dr. Akihiro Ito, Prof. Dr. Kazuyoshi Tanaka and Dr. Motoo Shiro A Triphenylamine Double-Decker: From a Delocalized Radical Cation to a Diradical Dication with an Excited Triplet State Angewandte Chemie International Edition 51
The redox properties and electronic structures of polycationic species were examined using a triphenylamine double-decker species. The double-decker has a strong electron-donating ability, and the spin in the radical cation is delocalized over the whole caged skeleton, despite no direct transannular π–π interaction between two TPA decks. Moreover, the diradical dication has spin-singlet character, despite the meta-phenylene linkage.
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