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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

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Autor(es):
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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]
Número total de Autores: 12
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: RSC ADVANCES; v. 10, n. 11, p. 6259-6270, FEB 12 2020.
Citações Web of Science: 0
Resumo

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)

Processo FAPESP: 13/23572-0 - Materiais híbridos nanoestruturados por auto-montagem de nanopartículas induzida por biomoléculas
Beneficiário:Luiz Fernando Gorup
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
Beneficiário:Elson Longo da Silva
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
Processo FAPESP: 12/07067-0 - Fotocatalisadores baseados em titanato de bismuto sintetizadas pelo método dos complexos oxidantes de peróxido (OPM)
Beneficiário:Emerson Rodrigues de Camargo
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 08/57872-1 - Instituto Nacional de Ciências dos Materiais em Nanotecnologia
Beneficiário:Elson Longo da Silva
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 16/01940-5 - Sistema estruturado por auto montagem de nanopartículas com a mudança de carga de proteínas
Beneficiário:Luiz Fernando Gorup
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado