Síntese, caracterização e aplicação de compostos contendo oxiânions de selênio

• Ano de defesa: 2020
• Autor(a) principal: Lunardi, Andressa
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Química; UFSM; Programa de Pós-Graduação em Química; Centro de Ciências Naturais e Exatas
• Palavras-chave em Português: Selenito; Compostos de coordenação; Polímeros de coordenação; Solvotermal; Hidrogenosselenito; Fotossensibilizador; Selenite; Coordination compounds; Hydrogen selenite; Coordination polymers; Photosensitizer; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/23083

This work describes the synthesis and structural characterization of five new coordination compounds containing, as an inorganic ligand, the selenite and hydrogen selenite anion. The compounds [Zn4(μ-SeO3)2(μ4-SeO3)2(bipy)4]·11H2O (1) and [Zn4(μ-SeO3)2(μ4-SeO3)2(phen)4]·9H2O (2) are molecular while [Zn(μ-HSeO3)2(bipy)]n (3), [Zn(μ-HSeO3)2(phen)]n (4) and [Co(μ-HSeO3)2(bipy)]n (5) are polymeric. The compounds were obtained from a solvothermal system and characterized by single crystal X-ray diffraction analysis, elemental analysis (EA), high resolution mass spectrometry, infrared (IR) spectroscopy, Raman spectroscopy and, for some of them, nuclear magnetic resonance spectroscopy analysis was performed. Compounds 1, 4 and 5 were tested as photosensitizers of TiO2 for H2(g) production. The compounds 4 and 5 showed promising results. The application is of great value due to the search for renewable, accessible and non-polluting energy sources.