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Article Dans Une Revue Langmuir Année : 2022

Improving orientation, packing density and molecular arrangement in SAMs of bi-anchoring Ferrocene-triazole derivatives by 'Click' Chemistry

Amélioration de l'orientation, de la densité de surface et de l'arrangement moléculaire de monocouche auto assemblés de derivés de ferrocène-triazole à deux groupements d'ancrage par chimie click

Damien Brunel
Frédéric Dumur
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Thierry Buffeteau
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Christian A. Nijhuis
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Gérard Berginc
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Résumé

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.
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Dates et versions

hal-03603533 , version 1 (09-03-2022)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Citer

Vikas Jangid, Damien Brunel, Estéban Sanchez-Adaime, Anil Kumar Bharwal, Frédéric Dumur, et al.. Improving orientation, packing density and molecular arrangement in SAMs of bi-anchoring Ferrocene-triazole derivatives by 'Click' Chemistry. Langmuir, 2022, 38 (11), pp.3585-3596. ⟨10.1021/acs.langmuir.2c00215⟩. ⟨hal-03603533⟩
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