Persistent, highly localized, and tunable [4]helicene radicals
Aslam C. Shaikh, Jules Moutet, José M. Veleta, Md Mubarak Hossain, Jan Bloch, Andrei V. Astashkin, Thomas L. Gianetti
Abstract
We report a series of tunable and persistent [4]-helicene neutral radicals by chemical reduction of the [4]-helicenium cation analogue. EPR spectroscopy and DFT calculations indicate that the unpaired electron is localized at the central carbon atom.
Topics & Concepts
HeliceneRadicalUnpaired electronElectron paramagnetic resonanceCarbon atomChemistrySpectroscopyPhotochemistryAtom (system on chip)CrystallographyCarbon fibersMoleculeMaterials scienceNuclear magnetic resonanceOrganic chemistryRing (chemistry)PhysicsComputer scienceQuantum mechanicsComposite materialEmbedded systemComposite numberSynthesis and Properties of Aromatic CompoundsPorphyrin and Phthalocyanine ChemistryAdvanced NMR Techniques and Applications