Stability of di-butyl-dichalcogenide-capped gold nanoparticles: experimental data and theoretical insights.

Autor:	Gorup LF; LIEC - Department of Chemistry, UFSCar-Federal University of São Carlos Rod. Washington Luis km 235, CP 676 São Carlos SP 13565-9905 Brazil.; Faculty of Exact Sciences and Technology (FACET), Department of Chemistry, Federal University of Grande Dourados Rodovia Dourados, Itahum, Km 12 - Unidade II, Caixa Postal: 364, Cep: 79.804-970 Dourados MS 79804-970 Brazil lfgorup@gmail.com +55 1698100 3030., Perlatti B; LIEC - Department of Chemistry, UFSCar-Federal University of São Carlos Rod. Washington Luis km 235, CP 676 São Carlos SP 13565-9905 Brazil., Kuznetsov A; Departamento de Química, Campus Santiago Vitacura, Universidad Técnica Federico Santa María Av. Santa María 6400 Vitacura Santiago Chile., Nascente PAP; Department of Materials Engineering, UFSCar-Federal University of Sao Carlo Rod. Washington Luis km 235, CP 676 São Carlos SP 13565-905 Brazil., Wendler EP; LIEC - Department of Chemistry, UFSCar-Federal University of São Carlos Rod. Washington Luis km 235, CP 676 São Carlos SP 13565-9905 Brazil., Dos Santos AA; Instituto de Química, Universidade de São Paulo São Paulo SP 05508-000 Brazil., Padilha Barros WR; Faculty of Exact Sciences and Technology (FACET), Department of Chemistry, Federal University of Grande Dourados Rodovia Dourados, Itahum, Km 12 - Unidade II, Caixa Postal: 364, Cep: 79.804-970 Dourados MS 79804-970 Brazil lfgorup@gmail.com +55 1698100 3030., Sequinel T; Faculty of Exact Sciences and Technology (FACET), Department of Chemistry, Federal University of Grande Dourados Rodovia Dourados, Itahum, Km 12 - Unidade II, Caixa Postal: 364, Cep: 79.804-970 Dourados MS 79804-970 Brazil lfgorup@gmail.com +55 1698100 3030., Tomitao IM; Faculty of Exact Sciences and Technology (FACET), Department of Chemistry, Federal University of Grande Dourados Rodovia Dourados, Itahum, Km 12 - Unidade II, Caixa Postal: 364, Cep: 79.804-970 Dourados MS 79804-970 Brazil lfgorup@gmail.com +55 1698100 3030., Kubo AM; LIEC - Department of Chemistry, UFSCar-Federal University of São Carlos Rod. Washington Luis km 235, CP 676 São Carlos SP 13565-9905 Brazil., Longo E; LIEC - Department of Chemistry, UFSCar-Federal University of São Carlos Rod. Washington Luis km 235, CP 676 São Carlos SP 13565-9905 Brazil., Camargo ER; LIEC - Department of Chemistry, UFSCar-Federal University of São Carlos Rod. Washington Luis km 235, CP 676 São Carlos SP 13565-9905 Brazil.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2020 Feb 10; Vol. 10 (11), pp. 6259-6270. Date of Electronic Publication: 2020 Feb 10 (Print Publication: 2020).
DOI:	10.1039/c9ra07147d
Abstrakt:	Metals capped with organochalcogenides have attracted considerable interest due to their practical applications, which include catalysis, sensing, and biosensing, due to their optical, magnetic, electrochemical, adhesive, lubrication, and antibacterial properties. There are numerous reports of metals capped with organothiol molecules; however, there are few studies on metals capped with organoselenium or organotellurium. Thus, there is a gap to be filled regarding the properties of organochalcogenide systems which can be improved by replacing sulfur with selenium or tellurium. In the last decade, there has been significant development in the synthesis of selenium and tellurium compounds; however, it is difficult to find commercial applications of these compounds because there are few studies showing the feasibility of their synthesis and their advantages compared to organothiol compounds. Stability against oxidation by molecular oxygen under ambient conditions is one of the properties which can be improved by choosing the correct organochalcogenide; this can confer important advantages for many more suitable applications. This paper reports the successful synthesis and characterization of gold nanoparticles functionalized with organochalcogenide molecules (dibutyl-disulfide, dibutyl-diselenide and dibutyl-ditelluride) and evaluates the oxidation stability of the organochalcogenides. Spherical gold nanoparticles with diameters of 24 nm were capped with organochalcogenides and were investigated using X-ray photoelectron spectroscopy (XPS) to show the improved stability of organoselenium compared with organothiol and organotellurium. The results suggest that the organoselenium is a promising candidate to replace organothiol because of its enhanced stability towards oxidation by molecular oxygen under ambient conditions and its slow oxidation rate. The observed difference in the oxidation processes, as discussed, is also in agreement with theoretical calculations. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu