Colloidal synthesis of Au nanoparticles using polyelectrolytes with 1,3,4-thiadiazole as reducing agents |
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Authors: | Martín Caldera Villalobos Miriam Martins Alho Jesús García Serrano Giaan Arturo Álvarez Romero Ana M. Herrera González |
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Affiliation: | 1. Universidad Autónoma del Estado de Hidalgo, Instituto de Ciencias Básicas e Ingeniería, Laboratorio de Polímeros, Carretera Pachuca-Tulancingo km. 4.5, Colonia Carboneras, C.P. 42184, Mineral de la Reforma, Hidalgo, Mexico;2. Facultad de Ingeniería, Departamento de Química, Universidad de Buenos Aires, Cátedra de Química Orgánica, Avenue Paseo Colón, 850, CABA, Argentina;3. Universidad Autónoma del Estado de Hidalgo, Instituto de Ciencias Básicas e Ingeniería, Área Académica de Química, Carretera Pachuca-Tulancingo, Colonia Carboneras, C.P. 42184, Mineral de la Reforma, Hidalgo, Mexico |
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Abstract: | Heterocyclic compounds are well known for their biological activity and coordination properties. Some heterocyclic compounds have been employed in the stabilization against coalescence of metallic nanoparticles in colloidal solutions, for example, tetrazole, triazole, and pyrazole. The aim of this work is to design new polyelectrolytes with heterocyclic pendant groups useful as reducing agents of Au3+ and as stabilizing agents for the synthesis of colloidal Au nanoparticles. Thus, polyelectrolytes with thiosemicarbazone and 1,3,4-thiadiazole pendant groups were used as reducing agents of Au3+ ions and stabilizing agents of Au nanoparticles. The voltammetry study of the polyelectrolytes showed that one with thiosemicarbazone pendant groups is the better reducing agent than polyelectrolytes with heterocyclic pendant groups. The polyelectrolytes can control the growth of the nanoparticles, obtaining structures with an average size of 9 nm. In this study, it was concluded that the nature of the heterocyclic group does not have an effect on the shape of nanoparticles and quasi-spherical nanoparticles were obtained with all polyelectrolytes. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47790. |
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Keywords: | 1,3,4-thiadiazole Au nanoparticles colloids polyelectrolytes reducing agents |
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