Single-Molecule Conductance of Neutral Closed-Shell and Open-Shell Diradical Indenofluorenes
Raquel Casares, Sandra Rodríguez‐González, Álvaro Martínez-Pinel, Irene R. Márquez, M. Teresa González, Cristina Dı́az, Fernando Martı́n, Juan M. Cuerva, Edmund Leary, Alba Millán
Abstract
High Resolution Image Download MS PowerPoint Slide Organic diradicals are highly promising candidates as future components in molecular electronic and spintronic devices because of their low spin–orbit coupling. To advance toward final circuit realizations, a thorough knowledge of the behavior of diradicals within a single-molecule junction framework is imperative. In this work, we have measured for the first time the single-molecule conductance of a neutral open-shell diradical compound, a [2,1- b ] isomer of indenofluorene (IF). Our results reveal that the conductance of the [2,1- b ] isomer is about 1 order of magnitude higher than that of the corresponding closed-shell regioisomer [1,2- b ] IF. This is significant, as it fundamentally demonstrates the possibility of forming stable single-molecule junctions using neutral diradical compounds which are also highly conducting. This opens up a new approach to the development of externally addressable spintronic devices operable at room temperature.