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

Abstract

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.

Molecular trapping in two-dimensional chiral organic Kagomé nanoarchitectures composed of Baravelle spiral triangle enantiomers

“…Engineering novel organic/inorganic interfaces through the self-assembly of functionalized molecules [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] is the focus of intense research interest for developing new applications in nanotechnology [19][20][21] . "Push-pull" dyes are promising building blocks to fabricate photoactive devices.…”

Ruthenium Ion‐Complexed Graphitic Carbon Nitride Nanosheets Supported on Reduced Graphene Oxide as High‐Performance Catalysts for Electrochemical Hydrogen Evolution

“…[39] For C 3 N 4 /rGO (curve ii)a nd RuÀC 3 N 4 /rGO (curve iii), the CÀN=Cp eak had undergone an apparent blueshift to 398.47 eV and 398.65 eV,r espectively.T aken together,t hese results suggest efficient charge transfer from C 3 N 4 to rGOa nd Ru centers. [24,29,40,41] Furthermore, based on the integratedp eak areas, the atomicr atio of N( C ÀN=C) to Ru was estimated to be approximately 2.3 for the RuÀC 3 N 4 /rGO sample, similar to that observed previously with RuÀC 3 N 4 where the ruthenium ions were coordinated to two Ns ites in CÀN=C. [24] Overall, results from the XPS measurements suggested strong electronic interactions among the three structural components of RuÀ C 3 N 4 /rGO, which may have significant impacts on the electrocatalytic activity towardsHER (see below).…”

Enhancing intramolecular features and identifying defects in organic and hybrid nanoarchitectures on a metal surface at room temperature using a NaCl-functionalized scanning tunneling microscopy tip

“…Characterizing two-dimensional nanostructures and nanoarchitectures [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] at the atomic scale is a challenge of nanosciences for the development of new functionalized nanomaterials for nanotechnology. 20,21 Scanning probe microscopy (SPM) is a powerful technique to assess locally the topographic and electronic properties of nanostructured surfaces.…”