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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Gorup, Luiz Fernando [1, 2] ; Perlatti, Bruno [1] ; Kuznetsov, Aleksey [3] ; Nascente, Pedro Augusto de Paula [4] ; Wendler, Edison Perevalo [1] ; Dos Santos, Alcindo A. [5] ; Padilha Barros, Willyam Roger [2] ; Sequinel, Thiago [2] ; Tomitao, Isabela de Macedo [2] ; Kubo, Andressa Mayumi [1] ; Longo, Elson [1] ; Camargo, Emerson Rodrigues [1]
Total Authors: 12
Affiliation:
[1] UFSCar Fed Univ Sao Carlos, LIEC Dept Chem, Rod Washington Luis Km 235, CP 676, BR-13565990 Sao Carlos, SP - Brazil
[2] Fundacao Univ Fed Grande Dourados, Dept Chem, Fac Exact Sci & Technol FACET, Km 12 Unidade 2, Caixa Postal 364, BR-79804970 Dourados, MS - Brazil
[3] Univ Tecn Federico Santa Maria, Dept Quim, Campus Santiago Vitacura, Santiago - Chile
[4] UFSCar Fed Univ Sao Carlo, Dept Mat Engn, Rod Washington Luis Km 235, CP 676, BR-13565905 Sao Carlos, SP - Brazil
[5] Univ Sao Paulo, Inst Quim, BR-05508000 Sao Paulo, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: RSC ADVANCES; v. 10, n. 11, p. 6259-6270, FEB 12 2020.
Web of Science Citations: 0
Abstract

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. (AU)

FAPESP's process: 13/23572-0 - Nanostructured hybrid materials by self-assembly of nanoparticles induced by biomolecules
Grantee:Luiz Fernando Gorup
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 12/07067-0 - Photocatalyst based in bismuth titanate synthesized by the oxidant peroxo method (OPM)
Grantee:Emerson Rodrigues de Camargo
Support Opportunities: Regular Research Grants
FAPESP's process: 08/57872-1 - National Institute for Materials Science in Nanotechnology
Grantee:Elson Longo da Silva
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/01940-5 - Structured systems by self-assemble of nanoparticles with charged protein molecules
Grantee:Luiz Fernando Gorup
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor