Para-Fluoro-Thiol Reaction on Anchor Layers Grafted from an Aryldiazonium Salt: A Tool for Surface Functionalization with Thiols
- 14 September 2021
- journal article
- research article
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 37 (38), 11397-11405
- https://doi.org/10.1021/acs.langmuir.1c02012
Abstract
A new coupling reaction, the para-fluoro-thiol (PFT) reaction, activated by base at room temperature, is reported for carbon surface functionalization. 4-Nitrothiophenol (4-NTP) and (3-nitrobenzyl)mercaptan (3-NBM) were coupled to penta-fluorophenyl (F-5-Ph) anchor layers grafted from the aryldiazonium ion formed in situ. The relative yields of the PFT reactions, estimated from the electrochemical responses of coupled nitrophenyl (NP) and nitrobenzyl (NB) groups, depended on the nucleophilicity of the thiolate and the strength of the base. The highest surface concentration (4.6 x 10(-10) mol cm(-2)) was obtained using 3-NBM in the presence of [Bu4N]OH; this concentration corresponds to the maximum that is typically achieved for other high-yielding coupling reactions at aryldiazonium ion anchor layers. The PFT reaction is expected to be applicable to the numerous thiol derivatives commonly restricted to self-assembled monolayer (SAM) formation at gold and other noble metals, thereby opening a simple new approach for interface design on carbon substrates. The strategy may also have advantages for modification of gold surfaces: the layer prepared by coupling 3-NBM to F-5-Ph films on gold was found to be more stable to storage under ambient conditions than self-assembled monolayers of 3-NBM.Keywords
Funding Information
- RSNZ Marsden Fund (UOC1711)
This publication has 54 references indexed in Scilit:
- Avogadro: an advanced semantic chemical editor, visualization, and analysis platformJournal of Cheminformatics, 2012
- Thiol-yne Reaction on Boron-Doped Diamond Electrodes: Application for the Electrochemical Detection of DNA–DNA Hybridization EventsAnalytical Chemistry, 2011
- Electrografting: a powerful method for surface modificationChemical Society Reviews, 2011
- Thiols deposition onto the surface of glassy carbon electrodes mediated by electrical potentialElectrochimica Acta, 2011
- Functionalized, Biocompatible Coating for Superparamagnetic Nanoparticles by Controlled Polymerization of a Thioglycosidic MonomerBiomacromolecules, 2011
- Formation and Stability of Alkylthiol Monolayers on Carbon SubstratesThe Journal of Physical Chemistry C, 2010
- Electrochemical Functionalization of Carbon Surfaces by Aromatic Azide or Alkyne Molecules: A Versatile Platform for Click ChemistryChemistry – A European Journal, 2008
- Self-Assembled Monolayers of Thiolates on Metals as a Form of NanotechnologyChemical Reviews, 2005
- Dynamics of the Formation of Mixed Alkanethiol Monolayers: Applications in Structuring Biointerfacial ArrangementsLangmuir, 1998
- Inductive Effects on the Acid Dissociation Constants of Mercaptans1Journal of the American Chemical Society, 1960