期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 3, 期 30, 页码 7890-7896出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc01233c
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资金
- EPSRC [EP/I014039/1]
- University of Leeds
- EPSRC [EP/K023845/1, EP/I000623/1, EP/K039202/1, EP/E015530/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K039202/1, EP/I014039/1] Funding Source: researchfish
Drop-casting acetone solutions of [Fe(bpp)(2])[BF4](2) (bpp = 2,6-di[pyrazol-1-yl] pyridine) onto a HOPG surface affords unusual chain-of-beads nanostructures. The beads in each chain are similar in size, with diameters in the range of 2-6 nm and heights of up to 10 angstrom, which is consistent with them containing between 10-50 molecules of the compound. The beads can be classified into two types, which exhibit different conduction regimes by current-imaging tunnelling spectroscopy (CITS) which appear to correlate with their positions in the chains, and may correspond to molecules containing high-spin and low-spin iron centres. Similarly drop-cast films of the complex on a gold surface contain the intact [Fe(bpp) 2][BF4] 2 compound by XPS. 4-Mercapto-2,6-di[pyrazol-1-yl] pyridine undergoes substantial decomposition when deposited on gold, forming elemental sulfur, but 4-(N-thiomorpholinyl)-2,6-di[pyrazol-1-yl] pyridine successfully forms SAMs on a gold surface by XPS and ellipsometry.
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