Aromatic self-assembled monolayers with pentafluoro-λ6-sulfanyl (- SF5) termination: molecular organization and charge transport properties
A series of molecules with oligophenylene backbone, thiolate anchoring group, and pentafluoro-λ6-sulfanyl (−SF5) tail group was synthesized and used as precursors to form self-assembled monolayers (SAMs) on Au(111) substrates. The resulting SAMs feature dense molecular packing, upright molecular ori...
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| Main Authors: | , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2023
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| In: |
Nano research
Year: 2023, Volume: 16, Issue: 5, Pages: 7991-8002 |
| ISSN: | 1998-0000 |
| DOI: | 10.1007/s12274-022-5350-8 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/s12274-022-5350-8 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/s12274-022-5350-8 
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| Author Notes: | Yangbiao Liu, Marc Zeplichal, Sonja Katzbach, Adrian Wiesner, Saunak Das, Andreas Terfort, and Michael Zharnikov |
| Summary: | A series of molecules with oligophenylene backbone, thiolate anchoring group, and pentafluoro-λ6-sulfanyl (−SF5) tail group was synthesized and used as precursors to form self-assembled monolayers (SAMs) on Au(111) substrates. The resulting SAMs feature dense molecular packing, upright molecular orientation, and chemically homogeneous SAM-ambient interface, comprised entirely of the −SF5 moieties. These SAMs exhibit exceptional wetting and electrostatic properties, showing advancing water contact angles up to 103° and work function values up to 5.96 eV—probably the highest values reported for any aromatic monolayers on gold. They also feature a comparably low value of the tunnelling decay coefficient (0.38 ± 0.07 Å−1), typical of oligophenylene backbone, which is not affected by the introduction of the −SF5 group. The latter also hardly affects the current densities at a specific bias compared to analogous monolayers with other electronegative tail groups. The superior electrostatic and good charge transport properties of the designed, SF5-terminated SAMs make them potentially useful for interface engineering in organic electronics and photovoltaics. |
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| Item Description: | Veröffentlicht: 04. Februar 2023 Im Titel ist "lambda" als griechischer Buchstabe dargestellt Im Titel ist die Zahl 6 hoch- und die Zahl 5 tiefgestellt Gesehen am 27.09.2023 |
| Physical Description: | Online Resource |
| ISSN: | 1998-0000 |
| DOI: | 10.1007/s12274-022-5350-8 |