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• W4294292018 startingPage "13790" @default.
• W4294292018 abstract "We demonstrate the reversible in situ photoreduction of molecular junctions of phosphomolybdate [PMo12O40]3- monolayer self-assembled on flat gold electrodes, connected by the tip of a conductive atomic force microscope. The conductance of the one electron reduced [PMo12O40]4- molecular junction is increased by ca. 10, this open-shell state is stable in the junction in air at room temperature. The analysis of a large current-voltage dataset by unsupervised machine learning and clustering algorithms reveals that the electron transport in the pristine phosphomolybdate junctions leads to symmetric current-voltage curves, controlled by the lowest unoccupied molecular orbital (LUMO) at 0.6 - 0.7 eV above the Fermi energy with ca. 25% of the junctions having a better electronic coupling to the electrodes than the main part of the dataset. This analysis also shows that a small fraction (ca. 18% of the dataset) of the molecules is already reduced. The UV light in situ photoreduced phosphomolybdate junctions are systematically featuring slightly asymmetric current - voltage behaviors, which is ascribed to electron transport mediated by the single occupied molecular orbital (SOMO) nearly at resonance with the Fermi energy of the electrode and by a closely located single unoccupied molecular orbital (SUMO) at ca. 0.3 eV above the SOMO with a weak electronic coupling to the electrodes (ca. 50% of the dataset) or at ca. 0.4 eV but with a better electrode coupling (ca. 50% of the dataset). These results shed lights to the electronic properties of reversible switchable redox polyoxometalates, a key point for potential applications in nanoelectronic devices." @default.
• W4294292018 created "2022-09-02" @default.
• W4294292018 creator A5021603956 @default.
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• W4294292018 date "2022-01-01" @default.
• W4294292018 modified "2023-09-30" @default.
• W4294292018 title "Redox-controlled conductance of polyoxometalate molecular junctions" @default.
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• W4294292018 doi "https://doi.org/10.1039/d2nr03457c" @default.
• W4294292018 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36102689" @default.
• W4294292018 hasPublicationYear "2022" @default.
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