Triptycene-based self-assembled monolayer as a template for successive click reactions

Triptycene-based molecules represent a promising platform for tripodal monomolecular assembly on solid substrates. The versatility of the approach can be increased significantly if a decoration of the assembled tripods by purpose-specific functional groups will be possible. In this context, the poss...

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Hauptverfasser: Das, Saunak (VerfasserIn) , Ishiwari, Fumitaka (VerfasserIn) , Shoji, Yoshiaki (VerfasserIn) , Fukushima, Takanori (VerfasserIn) , Zharnikov, Michael (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 1 March 2023
In: The journal of physical chemistry. C, Energy, materials, and catalysis
Year: 2023, Jahrgang: 127, Heft: 10, Pages: 5178-5185
ISSN:1932-7455
DOI:10.1021/acs.jpcc.3c00443
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/acs.jpcc.3c00443
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Verfasserangaben:Saunak Das, Fumitaka Ishiwari, Yoshiaki Shoji, Takanori Fukushima, and Michael Zharnikov

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520 |a Triptycene-based molecules represent a promising platform for tripodal monomolecular assembly on solid substrates. The versatility of the approach can be increased significantly if a decoration of the assembled tripods by purpose-specific functional groups will be possible. In this context, the possibility of click reaction between the 10-ethynyl-substituted 1,8,13-trimercaptomethyltriptycene monolayer (EtTripS) on Au(111) and an azide-decorated substituent is tested and additionally verified by a subsequent derivatization reaction. The primary monolayer is shown to exhibit dense molecular packing, tripodal adsorption geometry, and high orientational order, which qualify it well as a template for subsequent reactions. The characteristic spectroscopic fingerprints of the click and derivatization reactions were recorded. The overall impact of these reactions on the work function of the EtTripS-engineered substrate─used as a measure of their efficiency and as an example of functional properties─was well comparable with the effect of the analogous substitution (−CF3) for monodentate monolayers, emphasizing the high potential of the on-surface modification approach. 
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