Photoinduced Energy Transfer via an Atropisomeric Molecular Bridge

Abstract Atropisomeric scaffolds offer the possibility to predictably position donor and acceptor groups in specific spatial relationships. Herein, a configurationally stable 1,2’‐binaphthyl linkage was employed to place a ruthenium(II) tris‐(2,2’‐bipyridine) complex in proximity to an anthracene moiety to explore how photoinduced triplet‐triplet energy transfer can proceed across this type of molecular bridge. An efficient synthesis provided the ruthenium(II)‐anthracene dyad with high yields, which allowed to determine characteristic features for the intramolecular energy transfer.