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Controlled Modification of Polymer Surfaces through Grafting of Calix[4]arene-Tetradiazoate Salts

Abstract : An attractive methodology based on diazonium chemistry has been developed for the surface modification of polymers such as polypropylene (PP), polyethylene terephthalate (PET), and polystyrene (PS). The grafting procedure involves the in situ formation of diazoates in basic aqueous solution. The reactivity of calix[4]arene-tetradiazonium salts and a classical aryldiazonium salt was examined through comparative studies on gold and polymer surfaces. The surfaces were analyzed with a combination of techniques such as AFM, XPS, and ellipsometry. The results highlighted the fact that the calix[4]arene molecules are grafted as a robust and uniform monolayer both on gold and polymer surfaces, allowing a fine control over surface modification. Furthermore, the chemical postfunctionalization of the grafted calixarene platforms equipped with carboxylic-pendant groups was successfully performed with either an amine or an alcohol. These results open real possibilities in the controlled immobilization on polymers of a wide variety of molecules of interest such as biomolecules or chromophores and in the tailoring of polymer properties.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01395477
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Ludovic Troian-Gautier, Daniel E. Martinez-Tong, Julie Hubert, François Reniers, Michele Sferrazza, et al.. Controlled Modification of Polymer Surfaces through Grafting of Calix[4]arene-Tetradiazoate Salts. Journal of Physical Chemistry C, American Chemical Society, 2016, 120 (40), pp.22936--22945. ⟨10.1021/acs.jpcc.6b06143⟩. ⟨hal-01395477⟩

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