Portal de Periódicos da CAPES

Ruthenium-Vinylhelicenes: Remote Metal-Based Enhancement and Redox Switching of the Chiroptical Properties of a Helicene Core

2012; American Chemical Society; Volume: 134; Issue: 38 Linguagem: Inglês

10.1021/ja304424t

1943-2984

Emmanuel Anger, Monika Srebro‐Hooper, Nicolas Vanthuyne, Loı̈c Toupet, Stéphane Rigaut, Christian Roussel, Jochen Autschbach, Jeanne Crassous, Régis Réau,

Axial and Atropisomeric Chirality Synthesis

Introducing metal-vinyl ruthenium moieties onto [6]helicene results in a significant enhancement of the chiroptical properties due to strong metal-ligand electronic interactions. The electro-active Ru centers allow the achievement of the first purely helicene-based redox-triggered chiroptical switches. A combination of electrochemical, spectroscopic, and theoretical techniques reveals that the helicene moiety is a noninnocent ligand bearing a significant spin density.