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Article Dans Une Revue Journal of Physical Chemistry C Année : 2014

One-Pot Electrografting of Mixed Monolayers with Controlled Composition

Résumé

Surface functionalization with ultrathin layers exhibiting a highly robust interface is of paramount importance for designing materials with tailored properties or operating functions, without modifying drastically the material’s bulk structures. A fine-tuning of the surface composition obtained, for instance from binary mixed layers, is also a key issue for developing high value-added applications like efficient sensors. Herein, binary mixtures of calix[4]arene-tetra-diazonium salts generated in situ from their corresponding calix[4]tetra-anilines are electrografted to form covalently bound monolayers onto substrates for yielding versatile functionalizable molecular platforms. Wettability studies, X-ray photoelectron spectroscopy analyses, and scanning electrochemical microscopy show the formation of homogeneous mixed monolayers. The distribution of the two calixarenes on the surface is directed by their relative molar fraction in the deposition solution. The strategy allows the control of the composition of mixed monolayers in a one-step approach. Postfunctionalization of the mixed layers with ferrocene centers is performed to exemplify the benefit of a dilution procedure when functional groups are introduced at the calix[4]arene small rim. This study highlights the potential of diazonium salt electrografting as a competitive alternative to chemisorption strategies such as self-assembled monolayers of alkyl thiols in the field of surface functionalization.

Domaines

Chimie organique
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Dates et versions

hal-01151709 , version 1 (13-05-2015)

Identifiants

Citer

Luis Santos, Alice Mattiuzzi, Nicolas Vandencasteele, F. Reniers, Olivia Reinaud, et al.. One-Pot Electrografting of Mixed Monolayers with Controlled Composition. Journal of Physical Chemistry C, 2014, 118 (29), pp.15919-15928. ⟨10.1021/jp5052003⟩. ⟨hal-01151709⟩
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