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Unprecedented Self-Organized Monolayer of a Ru(II) Complex by Diazonium Electroreduction

Nguyen, VQ; Sun, XN; Lafolet, F; Audibert, JF; Miomandre, F; Lemercier, G; Loiseau, F; Lacroix, JC JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 2016, 138, 9381-9384.

A new heteroleptic polypyridyle Ru(II) complex was synthesized and deposited on surface by the diazonium electroreduction process. It yields to the covalent grafting of a monolayer. The functionalized surface was characterized by XPS, electrochemistry, AFM, and STM. A precise organization of the molecules within the monolayer is observed with parallel linear stripes separated by a distance of 3.8 nm corresponding to the lateral size of the molecule. Such organization suggests a strong cooperative process in the deposition process. This strategy is an original way to obtain well-controlled and stable functionalized surfaces for potential applications related to the photophysical properties of the grafted chromophore. As an exciting result, it is the first example of a self-organized monolayer (SOM) obtained using diazonium electroreduction.

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Publication

Dates :

Paru le 18 juillet 2016

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DOI: 10.1021/jacs.6b04827