title: A C216-Nanographene Molecule with Defined Cavity as Extended Coronoid.
abstract: We describe the first coronoid nanographene C216-molecule. As an extended polycyclic aromatic hydrocarbon containing a defined cavity, our molecule can be seen as a model system to study the influence of holes on the physical and chemical properties of graphene. Along the pathway of an eight-step synthesis including Yamamoto-type cyclization followed by 6-fold Diels-Alder cycloaddition, C216 was obtained by oxidative cyclodehydrogenation in the final step. The defined molecular structure with a cavity was unambiguously validated by MALDI-TOF mass spectrometry and FTIR, Raman, and UV-vis absorption spectroscopy coupled with DFT simulations.
authors.affiliation: Max Planck Institute for Polymer Research , Ackermannweg 10, 55128, Mainz, Germany.
authors.forename: Uliana
authors.initials: U
authors.lastname: Beser
authors.affiliation: Max Planck Institute for Polymer Research , Ackermannweg 10, 55128, Mainz, Germany.
authors.forename: Marcel
authors.initials: M
authors.lastname: Kastler
authors.affiliation: Dipartimento di Chimica, Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano , Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
authors.forename: Ali
authors.initials: A
authors.lastname: Maghsoumi
authors.affiliation: Max Planck Institute for Polymer Research , Ackermannweg 10, 55128, Mainz, Germany.
authors.forename: Manfred
authors.initials: M
authors.lastname: Wagner
authors.affiliation: Dipartimento di Chimica, Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano , Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Castiglioni
authors.affiliation: Dipartimento di Chimica, Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano , Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
authors.forename: Matteo
authors.initials: M
authors.lastname: Tommasini
authors.affiliation: Max Planck Institute for Polymer Research , Ackermannweg 10, 55128, Mainz, Germany.
authors.forename: Akimitsu
authors.initials: A
authors.lastname: Narita
authors.affiliation: Center for Advancing Electronics Dresden (CFAED) & Department of Chemistry and Food Chemistry, Dresden University of Technology , Walther-Hempel-Bau Mommsenstrasse 4, 01062 Dresden, Germany.
authors.forename: Xinliang
authors.initials: X
authors.lastname: Feng
authors.affiliation: Max Planck Institute for Polymer Research , Ackermannweg 10, 55128, Mainz, Germany.
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen