A ruthenium(II) complex with bis(3,5-dimethylpyrazol-1-yl)dithioacetate built layer-by-layer on silver and gold surfaces

Díaz-García, Alicia; Gutiérrez, Smith; Ortiz, Mayreli; Sánchez, Iliana; Cao, Roberto; Otero, Antonío

doi:10.1016/j.inoche.2007.09.018

Cited by 3 publications

(1 citation statement)

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“…This is due to their easy preparation, relatively high stability, and their promising applications in several fields ranging from chemistry to materials and biological sciences 1–3 . Adsorbates such as n ‐alkanethiols and their derivatives, 4,5 1,1‐dithiocarboxylates, 4,6,7 1,1‐dithiocarbamates, 4,8–10 and xanthates 4,11 have been used to synthesize SAM on Au(111) with acceptable stability. More information regarding the use of monodentate and multidentate organosulfur derivatives with different molecular architectures 12–16 is continually being reported.…”

Section: Introductionmentioning

confidence: 99%

4,5‐Bis(diphenylthiophosphinoyl)‐1,2,3‐triazolate interaction with gold nanoparticles and flat surfaces to form self‐assembled monolayers

Correa‐Ascencio

Galván‐Miranda

Garcı́a-Montalvo

et al. 2020

Surface & Interface Analysis

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The interaction of the 4,5-bis(diphenylthiophosphinoyl)-1,2,3-triazolate (SPTz −) with different gold surfaces was investigated (nanoparticles, an electrode, and flat sheets). Studies on binding affinity of this dithiophosphin-triazolate on a gold electrode were performed by cyclic voltammetry (CV). Voltammograms exhibit two reductive desorption and only one oxidative readsorption, indicating that once reabsorbed, the molecule achieves a unique conformation. The morphology and average size of modified gold nanoparticles were studied by transmission electron microscopy (TEM) (av. diameter of 5.9 ± 1.8 nm). Further characterization was made by UV-visible (UV-vis) spectroscopy showing surface plasmon resonance (SPR) at about 580 nm. The bonding configurations of SPTz − on gold have also been investigated by comparing the FT-IR and FT-Raman spectra. The 31 P{ 1 H} NMR spectrum of capped nanoparticles exhibited two sharp signals at 30.3 and 29.6 ppm and a very broad signal at 72.7 ppm. X-ray photoelectron spectroscopy (XPS) showed SPTz − can accomplish a strong interaction with gold nanoparticles through bonds involving a sulfur atom and a nitrogen from the triazole ring with a free terminal PS group, forming self-assembled monolayers (SAM). This may allow subsequent functionalization through free S/N atoms of the formed SAMs. The SPTz − packing led to a reduction in packing density that permits large spaces between adsorbed headgroups and the inclusion of carbon and oxygen impurities from small molecules; nevertheless, oxidized sulfur or nitrogen species were not detected, indicating the chemical stability of the obtained SAMs.

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