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Step-by-Step Layer-by-Layer Assembly Using 1,2,3-Triazole as a Platform for Controlled Multicharged and Multifunctional Coatings.

Reported for the first time is the use of click chemistry to make layer-by-layer multiple post-functionalization treatments. The use of triazole as a platform for the post-functionalization allows the introduction of new clickable structures on the surface. The layer-by-layer strategy by means of click chemistry allows the introduction of both multiple and/or different consecutive modifications on the surface and multicharged species. Herein it consists of the use of molecules functionalized by a 1-azido group and propargyl bromide to deposit functionalized triazolium-type charged oligomers on the substrate. Moreover, different functional groups can be introduced at each step, which amplifies the use of this strategy for many potential applications. Here, to give an example of applications, that strategy is used to introduce alkyl chains and obtain highly hydrophobic materials. Moreover, it is shown that the surface morphology can also change after each treatment.