An innovative method for controlled synthesis of bicomponent monolayer films obtained by reduction of diazonium

Abstract

This study presents a novel method based on the electrochemical co-reduction of two aryldiazonium salts, enabling the synthesis of controlled two-component monolayer thin films on carbon in a single step.

Harnessing Aryldiazonium Salts Reduction for Tailored Bifunctionalized Surface Engineering

“…22,83 Such homogenization of the considered diazonium structures has (i) standardized the reduction potentials regardless of the end group (ΔE = 50 mV), (ii) enabled equalization of the radical's reactivity, and (iii) made the steric hindrance of the molecules involved uniform, thereby allowing precise stoichiometric control of the immobilized species. 84 Consistent electrochemical, spectroscopic, and XPS results showed that mixed layers with controlled composition closely resembling that of the original diazonium mixture were obtained via this approach.…”

“…If the last two aforementioned articles do not extend the studies toward obtaining similar molar ratios between grafted species and those in solution, they nevertheless highlight the beneficial impact of increasing the distance between the functional group and the diazonium function through the introduction of methylene bridges. A recently described method has taken a further step by introducing a 12-carbon alkyl chain between the aromatic ring and the functional group, thereby canceling out its electronic effect. , Such homogenization of the considered diazonium structures has (i) standardized the reduction potentials regardless of the end group (Δ E = 50 mV), (ii) enabled equalization of the radical’s reactivity, and (iii) made the steric hindrance of the molecules involved uniform, thereby allowing precise stoichiometric control of the immobilized species . Consistent electrochemical, spectroscopic, and XPS results showed that mixed layers with controlled composition closely resembling that of the original diazonium mixture were obtained via this approach.…”