Print Email Facebook Twitter Enhanced Separation Concept (ESC) Title Enhanced Separation Concept (ESC): Removing the Functional Subunit from the Electrode by Molecular Design Author Brandl, Thomas (University of Basel) El Abbassi, M. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Stefani, D. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Frisenda, R. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Harzmann, Gero D. (University of Basel) van der Zant, H.S.J. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Mayor, Marcel (University of Basel; Karlsruhe Institut für Technologie; Sun Yat-sen University) Date 2019 Abstract A new concept to improve the reliability of functional single molecule junctions is presented using the E-field triggered switching of FeIIbis-terpyridine complexes in a mechanically controlled break junction experiment as model system. The complexes comprise a push-pull ligand sensing the applied E-field and the resulting distortion of the FeII ligand field is expected to trigger a spin-crossover event reflected in a sudden jump of the transport current. By molecular engineering, the active centre of the complex is separated from the gold electrodes in order to eliminate undesired side-effects. Two aspects are considered to isolate the central metal ion, namely the spacing by introducing additional alkynes, and the steric shielding achieved by bulky isopropyl groups. With this small series of model complexes, a pronounced correlation is observed between the occurrence of bistable junctions and the extent of separation of the central metal ion, affirming the hypothesized Enhanced Separation Concept (ESC). Subject Break junctionMolecular electronicsMolecular switchesSpin crossoverTerpyridine To reference this document use: http://resolver.tudelft.nl/uuid:6782245b-4b92-4aab-8d83-fcba2b0c74b2 DOI https://doi.org/10.1002/ejoc.201900432 ISSN 1434-193X Source European Journal of Organic Chemistry, 2019 (31-32), 5334-5343 Part of collection Institutional Repository Document type journal article Rights © 2019 Thomas Brandl, M. El Abbassi, D. Stefani, R. Frisenda, Gero D. Harzmann, H.S.J. van der Zant, Marcel Mayor Files PDF ejoc.201900432.pdf 7.17 MB Close viewer /islandora/object/uuid:6782245b-4b92-4aab-8d83-fcba2b0c74b2/datastream/OBJ/view