Improving Orientation, Packing Density, and Molecular Arrangement in Self-Assembled Monolayers of Bianchoring Ferrocene-Triazole Derivatives by "click" Chemistry

Vikas Jangid, Damien Brunel, Esteban Sanchez-Adaime, Anil Kumar Bharwal, Frédéric Dumur, David Duché, Mathieu Abel, Mathieu Koudia, Thierry Buffeteau, Christian A. Nijhuis, Gerard Berginc, Chrystelle Lebouin, Ludovic Escoubas*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
35 Downloads (Pure)

Abstract

This work describes the self-assembled monolayers (SAMs) of two ferrocene derivatives with two anchoring groups (at the bottom and at the top of the SAM) deposited on ultraflat template-stripped gold substrates by cyclic voltammetry and analyzed by complementary surface characterization techniques. The SAM of each molecule is deposited by three different protocols: direct deposition (one step), click reaction on the surface (two steps), and reverse click reaction on the surface (two steps). The SAM structure is well studied to determine the SAM orientation, SAM arrangement, and ferrocene position within the SAM. Electron transfer kinetics have also been studied, which agree with the quality of each SAM. With the help of two anchoring groups and click-chemistry active functional groups, we have shown that the two molecules can be deposited by controlling the position of ferrocene at either end. We further investigated the involvement of the triazole five-membered ring in the electron transfer mechanism. We have found that a carbon spacer between ferrocene and triazole improves the SAM packing. This study enhances the understanding of tethering thiol and thiol acetate anchoring groups on gold by a controlled orientation, which may help in the development of functional molecular devices requiring two anchoring groups.

Original languageEnglish
Pages (from-to)3585-3596
Number of pages12
JournalLangmuir
Volume38
Issue number11
DOIs
Publication statusPublished - 22 Mar 2022

Keywords

  • 2023 OA procedure

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