Robust Organic Radical Molecular Junctions Using Acetylene Terminated Groups for C-Au Bond Formation.
- Bejarano F Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB- CSIC) and CIBER-BBN , Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
- Olavarria-Contreras IJ Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, Delft 2628 CJ, The Netherlands.
- Droghetti A Nano-Bio Spectroscopy Group and European Theoretical Spectroscopy Facility (ETSF), Universidad del País Vasco (UPV/EHU) , Avenida Tolosa 72, 20018 San Sebastian, Spain.
- Rungger I National Physical Laboratory , Teddington TW11 0LW, United Kingdom.
- Rudnev A Department of Chemistry and Biochemistry, University of Bern , Freiestrasse 3, 3012 Bern, Switzerland.
- Gutiérrez D Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB- CSIC) and CIBER-BBN , Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
- Mas-Torrent M Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB- CSIC) and CIBER-BBN , Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
- Veciana J Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB- CSIC) and CIBER-BBN , Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
- van der Zant HSJ Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, Delft 2628 CJ, The Netherlands.
- Rovira C Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB- CSIC) and CIBER-BBN , Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
- Burzurı E Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, Delft 2628 CJ, The Netherlands.
- Crivillers N Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB- CSIC) and CIBER-BBN , Campus de la Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
- 2018-01-09
Published in:
- Journal of the American Chemical Society. - 2018
English
Organic paramagnetic and electroactive molecules are attracting interest as core components of molecular electronic and spintronic devices. Currently, further progress is hindered by the modest stability and reproducibility of the molecule/electrode contact. We report the synthesis of a persistent organic radical bearing one and two terminal alkyne groups to form Au-C σ bonds. The formation and stability of self-assembled monolayers and the electron transport through single-molecule junctions at room temperature have been studied. The combined analysis of both systems demonstrates that this linker forms a robust covalent bond with gold and a better-defined contact when compared to traditional sulfur-based linkers. Density functional theory and quantum transport calculations support the experimental observation highlighting a reduced variability of conductance values for the C-Au based junction. Our findings advance the quest for robustness and reproducibility of devices based on electroactive molecules.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1021/jacs.7b10019
- PMID 29307191
- Persistent URL
- https://sonar.ch/global/documents/424
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