On July 29, 2020, Ben Amara, Fadwa; Dionne, Eric R.; Kassir, Sahar; Pellerin, Christian; Badia, Antonella published an article.Quality Control of 1-Decanethiol The title of the article was Molecular Origin of the Odd-Even Effect of Macroscopic Properties of n-Alkanethiolate Self-Assembled Monolayers: Bulk or Interface?. And the article contained the following:
Elucidating the influence of the monolayer interface vs. bulk on the macroscopic properties (e.g., surface hydrophobicity, charge transport, and electron transfer) of organic self-assembled monolayers (SAMs) chem. anchored to metal surfaces is a challenge. This article reports the characterization of prototypical SAMs of n-alkanethiolates on gold (CH3(CH2)nSAu, n = 6-19) at the macroscopic scale by electrochem. impedance spectroscopy and contact angle goniometry, and at the mol. level, by IR reflection absorption spectroscopy. The SAM capacitance, dielec. constant, and surface hydrophobicity exhibit dependencies on both the length (n) and parity (nodd or neven) of the polymethylene chain. The peak positions of the CH2 stretching modes indicate a progressive increase in the chain conformational order with increasing n between n = 6 and 16. SAMs of nodd have a greater degree of structural gauche defects than SAMs of neven. The peak intensities and positions of the CH3 stretching modes are chain length independent but show an odd-even alternation of the spatial orientation of the terminal CH3. The correlations between the different data trends establish that the chain length dependencies of the dielec. constant and surface hydrophobicity originate from changes in the polymethylene chain conformation (bulk), while the odd-even variation arises primarily from a difference in the chem. composition of the interface related to the terminal group orientation. These findings provide new phys. insights into the structure-property relation of SAMs for the design of ultrathin film dielecs. as well as the understanding of stereostructural effects on the elec. characteristics of tunnel junctions. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Quality Control of 1-Decanethiol
The Article related to self assembled monolayer alkanethiolate gold structure property, Surface Chemistry and Colloids: Solid-Liquid Systems and other aspects.Quality Control of 1-Decanethiol
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