Silmar J S Franchi | Universidade Federal de Santa Catarina - UFSC (Federal University of Santa Catarina) (original) (raw)
Papers by Silmar J S Franchi
A coletânea aborda diversas perspectivas e desafios na educação contemporânea, aborda temas que v... more A coletânea aborda diversas perspectivas e desafios na educação contemporânea, aborda temas que vão desde a Didática na Química Inorgânica até a interpretação de metáforas em contos africanos. Explorando estratégias de autoria, impacto da arte-educação, conscientização sobre direitos autorais, influência da espiritualidade e reflexões sobre o ensino de música, enriquecimento curricular, entre outros. A obra proporciona uma contribuição diversificada e valiosa para o aprimoramento educacional, destinada a educadores, pesquisadores e profissionais da educação.
Esta obra é licenciada por uma Licença Creative Commons: Atribuição-NãoComercial-SemDerivações 4.... more Esta obra é licenciada por uma Licença Creative Commons: Atribuição-NãoComercial-SemDerivações 4.0 Internacional-(CC BY-NC-ND 4.0). Os termos desta licença estão disponíveis em: <https:// creativecommons.org/licenses/>. Direitos para esta edição cedidos à Pimenta Cultural. O conteúdo publicado não representa a posição oficial da Pimenta Cultural.
Caderno de Resumos do Congresso de Leitura do Brasil, Jul 29, 2021
In accordance with some specialists, chemistry teaching must be centered in the chemical knowledg... more In accordance with some specialists, chemistry teaching must be centered in the chemical knowledge and the social context. A chronicle narrates facts and events, through its own linguistic structures, in contrast to the eloquence of the great literary classics and of the classic approach of the textbooks of Chemistry. The short narrative, focused on everyday themes, allows the chronicles to be accessible, from the point of view of reading and written production. The proposal of using the chronicles in the teaching of chemistry, through a multimodal approach, evidences multiple possibilities of learning and conceptual change, highly desirable for the learning of the sciences. In this article, we discuss the use of Chronicles for Chemical Teaching, who consists in a good alternative to provide a better interaction between the student and the chemical knowledge. It would consist in an additional tool to be used by the teacher. We present two chronicles, that can be used in classrooms, for the deepening of contents involving the area of chemistry, desirable to the learning of the sciences.
Journal of Thermal Analysis and Calorimetry, Apr 1, 2011
This work describes the synthesis, characterization, and the thermal behavior investigation of fo... more This work describes the synthesis, characterization, and the thermal behavior investigation of four palladium(II) complexes with general formulae [PdX2(mba)2], in which mba = N-methylbenzylamine and X = OAc− (1), Cl− (2), Br− (3) or I− (4). The complexes were characterized by elemental analysis, infrared vibrational spectroscopy, and 1H nuclear magnetic resonance. The stoichiometry of the complexes was established by means of elemental analysis and thermogravimetry (TG). TG/DTA curves showed that the thermodecomposition of the four complexes occurred in 3–4 steps, leading to metallic palladium as final residue. The palladium content found in all curves was in agreement with the mass percentages calculated for the complexes. The following thermal stability sequence was found: 3 > 2 > 4 > 1. The geometry optimization of 1, 2, 3, and 4, calculated using the DFT/B3LYP method, yielded a slightly distorted square planar environment around the Pd(II) ion made by two anionic groups and two nitrogen atoms from the mba ligand (N1 and N2), in a trans-relationship.
O presente livro visa abordar a temática do Ensino de Química em seus diferentes aspectos e conte... more O presente livro visa abordar a temática do Ensino de Química em seus diferentes aspectos e contextos, como o processo de ensino-aprendizagem, uso das TICs, o Ensino de Química no ambiente virtual, propostas inovadoras no Ensino de Química em cursos de graduação em Química, relação professor-aluno, o Ensino contextualizado da Química, o Ensino de Química na pandemia, entre outros.
O ensino de química na contemporaneidade: desafios e inovações
Acta Chimica Slovenica, Sep 15, 2018
The reactions between [PdCl 2 (tmbiimH 2)]•H 2 O (1) {tmbiimH 2 = 2,2'-bis(4,5-dimethylimidazole)... more The reactions between [PdCl 2 (tmbiimH 2)]•H 2 O (1) {tmbiimH 2 = 2,2'-bis(4,5-dimethylimidazole)} and thiourea (tu), N-methylthiourea (mtu), N-phenylthiourea (ptu), N,N'-dimethylthiourea (dmtu) or N,N'-diphenylthiourea (dptu) in the 1:2 molar ratio resulted in the compounds [PdL 2 (tmbiimH 2)]Cl 2 •nH 2 O {L = tu (2), mtu (3), ptu (4), dmtu (5) and dptu (6)}, which were characterized by elemental analyses, infrared (IR), and 1 H NMR spectroscopies and conductivity measurements. The IR spectra of 1-6 were consistent with the presence of chelating tmbimH 2 ligand. All compounds and cisplatin were tested in vitro by MTT assay for their cytotoxicity against three murine cancer cell lines: mammary adenocarcinoma (LM3), lung adenocarcinoma (LP07) and mouse fibroblast (L929) cells. Relating the series of compounds to their biological activities we found compound 6 as the most promising of them.
Journal of Coordination Chemistry, 2009
Complexes of Ni(II), Co(II), Cu(II), Cd(II), Hg(II), and U(VI)O2 with 2-(2-(3,4-dihydronaphthalen... more Complexes of Ni(II), Co(II), Cu(II), Cd(II), Hg(II), and U(VI)O2 with 2-(2-(3,4-dihydronaphthalenylidene)hydrazinyl)-2-oxo-N-phenylacetamide (H2NHPA) have been prepared and characterized by elemental analysis, molar conductance, thermal (TG, DTG), spectral (H NMR, IR, UV–Vis, ESR), and magnetic measurements. IR spectra show that H2NHPA is a bidentate ligand. Thermal decomposition of some complexes ended with metal oxide as a final product. The room temperature solid
Brazilian Journal of Development
Os imidazóis representam uma alternativa interessante no design de compostos biologicamente ativo... more Os imidazóis representam uma alternativa interessante no design de compostos biologicamente ativos, pois muitos deles ocorrem naturalmente em sistemas biológicos. Há também um número significativo de imidazóis sintéticos que desempenham papéis importantes no combate à agentes patogênicos. Diversos autores têm obtido sucesso na síntese, caracterização e formação de complexos com destacada atividade biológica envolvendo diiminas (phen, bpy)cujo interesse está na obtenção de espécies químicas planares, aptas a interagirem com o DNA via intercalação, e ligantes biimidazólicos. Descrevemos nesse trabalho a síntese e caracterização dos complexos diimínicos [Pd(bpy)L]Cl2 (1) e Pd(phen)L]Cl2 (2), sendo L = 2,2'-bis(4,5-dimetilimidazol), bpy = 2,2´-bipiridil, phen = 1,10-fenantrolina. Os complexos foram sintetizados a partir de Na2[PdCl4], seguida da adição de quantidades equimolares de L no mínimo de metanol, sob agitação magnética, seguido da adição de bpy/phen em clorofórmio, dando origem a soluções vermelhas, com bons rendimentos. As análises por espectroscopia na região do infravermelho, ressonância magnética nuclear e análise elementar indicam a formação dos complexos Pd(bpy)L]Cl2 (1) e Pd(phen)L]Cl2 (2). Ensaios leishmanicidas iniciais frente à forma promastigota de L. amazonensis indicaram que o complexo 2 possui atividade biológica, ainda que inferior ao fármaco padrão.
De acordo com alguns especialistas, o Ensino de Quimica deve estar centrado no conhecimento quimi... more De acordo com alguns especialistas, o Ensino de Quimica deve estar centrado no conhecimento quimico e no contexto social. Na busca por alternativas para um ensino de quimica contextualizado, propusemos que o uso de cronicas poderia se constituir em uma boa alternativa por proporcionar uma melhor interacao entre o aluno e o conhecimento quimico. Ela se constituiria em uma ferramenta a mais a ser utilizada pelo professor, em conjunto com sua atividade e seu planejamento. Neste trabalho, desenvolvemos um conjunto de quinze cronicas, das quais ?De Olho na Natureza e nas Interacoes Intermoleculares?, ?Namorados no Ponto... de Ebulicao? e ?La na Pescaria...? foram aplicadas e avaliadas junto a alunos do Ensino Medio de uma escola da rede publica, localizada em Campinas, Sao Paulo. Fizemos a avaliacao das cronicas por meio de um questionario, no qual buscamos perceber a opiniao dos alunos sobre as mesmas, bem como se existiam dificuldades para a sua interpretacao e entendimento. Buscamos, ...
![Research paper thumbnail of Study on the thermal behavior of the complexes of the type [PdX2(tdmPz)] (X = Cl−, Br−, I−, SCN−)](https://attachments.academia-assets.com/75374710/thumbnails/1.jpg)
](Four new mononuclear Pd(II) complexes of the type [PdX 2 (tdmPz)] {X = Cl-(1); Br-(2); I-(3); SCN... more Four new mononuclear Pd(II) complexes of the type [PdX 2 (tdmPz)] {X = Cl-(1); Br-(2); I-(3); SCN-(4); tdmPz = 1-thiocarbamoyl-3,5-dimethylpyrazole} have been synthesized and characterized by elemental analysis, IR spectroscopy, 1 H and 13 C{ 1 H}-NMR experiments. The thermal behavior of the complexes 1-4 has been investigated by means of thermogravimetry (TG) and differential thermal analysis (DTA). From the initial decomposition temperatures, the thermal stability of the complexes can be ordered in the sequence: 3 \ 4 : 2 \ 1. The final products of the thermal decompositions were characterized as metallic palladium by X-ray powder diffraction.
Journal of Thermal Analysis and Calorimetry
This work describes the synthesis, characterization, and the thermal behavior investigation of fo... more This work describes the synthesis, characterization, and the thermal behavior investigation of four palladium(II) complexes with general formulae [PdX2(mba)2], in which mba = N-methylbenzylamine and X = OAc− (1), Cl− (2), Br− (3) or I− (4). The complexes were characterized by elemental analysis, infrared vibrational spectroscopy, and 1H nuclear magnetic resonance. The stoichiometry of the complexes was established by means of elemental analysis and thermogravimetry (TG). TG/DTA curves showed that the thermodecomposition of the four complexes occurred in 3–4 steps, leading to metallic palladium as final residue. The palladium content found in all curves was in agreement with the mass percentages calculated for the complexes. The following thermal stability sequence was found: 3 > 2 > 4 > 1. The geometry optimization of 1, 2, 3, and 4, calculated using the DFT/B3LYP method, yielded a slightly distorted square planar environment around the Pd(II) ion made by two anionic groups...
The reactions between [PdCl 2 (tmbiimH 2)]·H 2 O (1) {tmbiimH 2 = 2,2'-bis(4,5-dimethylimidazole)... more The reactions between [PdCl 2 (tmbiimH 2)]·H 2 O (1) {tmbiimH 2 = 2,2'-bis(4,5-dimethylimidazole)} and thiourea (tu), N-methylthiourea (mtu), N-phenylthiourea (ptu), N,N'-dimethylthiourea (dmtu) or N,N'-diphenylthiourea (dptu) in the 1:2 molar ratio resulted in the compounds [PdL 2 (tmbiimH 2)]Cl 2 ·nH 2 O {L = tu (2), mtu (3), ptu (4), dmtu (5) and dptu (6)}, which were characterized by elemental analyses, infrared (IR), and 1 H NMR spectroscopies and conductivity measurements. The IR spectra of 1–6 were consistent with the presence of chelating tmbimH 2 ligand. All compounds and cisplatin were tested in vitro by MTT assay for their cytotoxicity against three murine cancer cell lines: mammary adeno-carcinoma (LM3), lung adenocarcinoma (LP07) and mouse fibroblast (L929) cells. Relating the series of compounds to their biological activities we found compound 6 as the most promising of them.
A coletânea aborda diversas perspectivas e desafios na educação contemporânea, aborda temas que v... more A coletânea aborda diversas perspectivas e desafios na educação contemporânea, aborda temas que vão desde a Didática na Química Inorgânica até a interpretação de metáforas em contos africanos. Explorando estratégias de autoria, impacto da arte-educação, conscientização sobre direitos autorais, influência da espiritualidade e reflexões sobre o ensino de música, enriquecimento curricular, entre outros. A obra proporciona uma contribuição diversificada e valiosa para o aprimoramento educacional, destinada a educadores, pesquisadores e profissionais da educação.
Esta obra é licenciada por uma Licença Creative Commons: Atribuição-NãoComercial-SemDerivações 4.... more Esta obra é licenciada por uma Licença Creative Commons: Atribuição-NãoComercial-SemDerivações 4.0 Internacional-(CC BY-NC-ND 4.0). Os termos desta licença estão disponíveis em: <https:// creativecommons.org/licenses/>. Direitos para esta edição cedidos à Pimenta Cultural. O conteúdo publicado não representa a posição oficial da Pimenta Cultural.
Caderno de Resumos do Congresso de Leitura do Brasil, Jul 29, 2021
In accordance with some specialists, chemistry teaching must be centered in the chemical knowledg... more In accordance with some specialists, chemistry teaching must be centered in the chemical knowledge and the social context. A chronicle narrates facts and events, through its own linguistic structures, in contrast to the eloquence of the great literary classics and of the classic approach of the textbooks of Chemistry. The short narrative, focused on everyday themes, allows the chronicles to be accessible, from the point of view of reading and written production. The proposal of using the chronicles in the teaching of chemistry, through a multimodal approach, evidences multiple possibilities of learning and conceptual change, highly desirable for the learning of the sciences. In this article, we discuss the use of Chronicles for Chemical Teaching, who consists in a good alternative to provide a better interaction between the student and the chemical knowledge. It would consist in an additional tool to be used by the teacher. We present two chronicles, that can be used in classrooms, for the deepening of contents involving the area of chemistry, desirable to the learning of the sciences.
Journal of Thermal Analysis and Calorimetry, Apr 1, 2011
This work describes the synthesis, characterization, and the thermal behavior investigation of fo... more This work describes the synthesis, characterization, and the thermal behavior investigation of four palladium(II) complexes with general formulae [PdX2(mba)2], in which mba = N-methylbenzylamine and X = OAc− (1), Cl− (2), Br− (3) or I− (4). The complexes were characterized by elemental analysis, infrared vibrational spectroscopy, and 1H nuclear magnetic resonance. The stoichiometry of the complexes was established by means of elemental analysis and thermogravimetry (TG). TG/DTA curves showed that the thermodecomposition of the four complexes occurred in 3–4 steps, leading to metallic palladium as final residue. The palladium content found in all curves was in agreement with the mass percentages calculated for the complexes. The following thermal stability sequence was found: 3 > 2 > 4 > 1. The geometry optimization of 1, 2, 3, and 4, calculated using the DFT/B3LYP method, yielded a slightly distorted square planar environment around the Pd(II) ion made by two anionic groups and two nitrogen atoms from the mba ligand (N1 and N2), in a trans-relationship.
O presente livro visa abordar a temática do Ensino de Química em seus diferentes aspectos e conte... more O presente livro visa abordar a temática do Ensino de Química em seus diferentes aspectos e contextos, como o processo de ensino-aprendizagem, uso das TICs, o Ensino de Química no ambiente virtual, propostas inovadoras no Ensino de Química em cursos de graduação em Química, relação professor-aluno, o Ensino contextualizado da Química, o Ensino de Química na pandemia, entre outros.
O ensino de química na contemporaneidade: desafios e inovações
Acta Chimica Slovenica, Sep 15, 2018
The reactions between [PdCl 2 (tmbiimH 2)]•H 2 O (1) {tmbiimH 2 = 2,2'-bis(4,5-dimethylimidazole)... more The reactions between [PdCl 2 (tmbiimH 2)]•H 2 O (1) {tmbiimH 2 = 2,2'-bis(4,5-dimethylimidazole)} and thiourea (tu), N-methylthiourea (mtu), N-phenylthiourea (ptu), N,N'-dimethylthiourea (dmtu) or N,N'-diphenylthiourea (dptu) in the 1:2 molar ratio resulted in the compounds [PdL 2 (tmbiimH 2)]Cl 2 •nH 2 O {L = tu (2), mtu (3), ptu (4), dmtu (5) and dptu (6)}, which were characterized by elemental analyses, infrared (IR), and 1 H NMR spectroscopies and conductivity measurements. The IR spectra of 1-6 were consistent with the presence of chelating tmbimH 2 ligand. All compounds and cisplatin were tested in vitro by MTT assay for their cytotoxicity against three murine cancer cell lines: mammary adenocarcinoma (LM3), lung adenocarcinoma (LP07) and mouse fibroblast (L929) cells. Relating the series of compounds to their biological activities we found compound 6 as the most promising of them.
Journal of Coordination Chemistry, 2009
Complexes of Ni(II), Co(II), Cu(II), Cd(II), Hg(II), and U(VI)O2 with 2-(2-(3,4-dihydronaphthalen... more Complexes of Ni(II), Co(II), Cu(II), Cd(II), Hg(II), and U(VI)O2 with 2-(2-(3,4-dihydronaphthalenylidene)hydrazinyl)-2-oxo-N-phenylacetamide (H2NHPA) have been prepared and characterized by elemental analysis, molar conductance, thermal (TG, DTG), spectral (H NMR, IR, UV–Vis, ESR), and magnetic measurements. IR spectra show that H2NHPA is a bidentate ligand. Thermal decomposition of some complexes ended with metal oxide as a final product. The room temperature solid
Brazilian Journal of Development
Os imidazóis representam uma alternativa interessante no design de compostos biologicamente ativo... more Os imidazóis representam uma alternativa interessante no design de compostos biologicamente ativos, pois muitos deles ocorrem naturalmente em sistemas biológicos. Há também um número significativo de imidazóis sintéticos que desempenham papéis importantes no combate à agentes patogênicos. Diversos autores têm obtido sucesso na síntese, caracterização e formação de complexos com destacada atividade biológica envolvendo diiminas (phen, bpy)cujo interesse está na obtenção de espécies químicas planares, aptas a interagirem com o DNA via intercalação, e ligantes biimidazólicos. Descrevemos nesse trabalho a síntese e caracterização dos complexos diimínicos [Pd(bpy)L]Cl2 (1) e Pd(phen)L]Cl2 (2), sendo L = 2,2'-bis(4,5-dimetilimidazol), bpy = 2,2´-bipiridil, phen = 1,10-fenantrolina. Os complexos foram sintetizados a partir de Na2[PdCl4], seguida da adição de quantidades equimolares de L no mínimo de metanol, sob agitação magnética, seguido da adição de bpy/phen em clorofórmio, dando origem a soluções vermelhas, com bons rendimentos. As análises por espectroscopia na região do infravermelho, ressonância magnética nuclear e análise elementar indicam a formação dos complexos Pd(bpy)L]Cl2 (1) e Pd(phen)L]Cl2 (2). Ensaios leishmanicidas iniciais frente à forma promastigota de L. amazonensis indicaram que o complexo 2 possui atividade biológica, ainda que inferior ao fármaco padrão.
De acordo com alguns especialistas, o Ensino de Quimica deve estar centrado no conhecimento quimi... more De acordo com alguns especialistas, o Ensino de Quimica deve estar centrado no conhecimento quimico e no contexto social. Na busca por alternativas para um ensino de quimica contextualizado, propusemos que o uso de cronicas poderia se constituir em uma boa alternativa por proporcionar uma melhor interacao entre o aluno e o conhecimento quimico. Ela se constituiria em uma ferramenta a mais a ser utilizada pelo professor, em conjunto com sua atividade e seu planejamento. Neste trabalho, desenvolvemos um conjunto de quinze cronicas, das quais ?De Olho na Natureza e nas Interacoes Intermoleculares?, ?Namorados no Ponto... de Ebulicao? e ?La na Pescaria...? foram aplicadas e avaliadas junto a alunos do Ensino Medio de uma escola da rede publica, localizada em Campinas, Sao Paulo. Fizemos a avaliacao das cronicas por meio de um questionario, no qual buscamos perceber a opiniao dos alunos sobre as mesmas, bem como se existiam dificuldades para a sua interpretacao e entendimento. Buscamos, ...
Four new mononuclear Pd(II) complexes of the type [PdX 2 (tdmPz)] {X = Cl-(1); Br-(2); I-(3); SCN... more Four new mononuclear Pd(II) complexes of the type [PdX 2 (tdmPz)] {X = Cl-(1); Br-(2); I-(3); SCN-(4); tdmPz = 1-thiocarbamoyl-3,5-dimethylpyrazole} have been synthesized and characterized by elemental analysis, IR spectroscopy, 1 H and 13 C{ 1 H}-NMR experiments. The thermal behavior of the complexes 1-4 has been investigated by means of thermogravimetry (TG) and differential thermal analysis (DTA). From the initial decomposition temperatures, the thermal stability of the complexes can be ordered in the sequence: 3 \ 4 : 2 \ 1. The final products of the thermal decompositions were characterized as metallic palladium by X-ray powder diffraction.
Journal of Thermal Analysis and Calorimetry
This work describes the synthesis, characterization, and the thermal behavior investigation of fo... more This work describes the synthesis, characterization, and the thermal behavior investigation of four palladium(II) complexes with general formulae [PdX2(mba)2], in which mba = N-methylbenzylamine and X = OAc− (1), Cl− (2), Br− (3) or I− (4). The complexes were characterized by elemental analysis, infrared vibrational spectroscopy, and 1H nuclear magnetic resonance. The stoichiometry of the complexes was established by means of elemental analysis and thermogravimetry (TG). TG/DTA curves showed that the thermodecomposition of the four complexes occurred in 3–4 steps, leading to metallic palladium as final residue. The palladium content found in all curves was in agreement with the mass percentages calculated for the complexes. The following thermal stability sequence was found: 3 > 2 > 4 > 1. The geometry optimization of 1, 2, 3, and 4, calculated using the DFT/B3LYP method, yielded a slightly distorted square planar environment around the Pd(II) ion made by two anionic groups...
The reactions between [PdCl 2 (tmbiimH 2)]·H 2 O (1) {tmbiimH 2 = 2,2'-bis(4,5-dimethylimidazole)... more The reactions between [PdCl 2 (tmbiimH 2)]·H 2 O (1) {tmbiimH 2 = 2,2'-bis(4,5-dimethylimidazole)} and thiourea (tu), N-methylthiourea (mtu), N-phenylthiourea (ptu), N,N'-dimethylthiourea (dmtu) or N,N'-diphenylthiourea (dptu) in the 1:2 molar ratio resulted in the compounds [PdL 2 (tmbiimH 2)]Cl 2 ·nH 2 O {L = tu (2), mtu (3), ptu (4), dmtu (5) and dptu (6)}, which were characterized by elemental analyses, infrared (IR), and 1 H NMR spectroscopies and conductivity measurements. The IR spectra of 1–6 were consistent with the presence of chelating tmbimH 2 ligand. All compounds and cisplatin were tested in vitro by MTT assay for their cytotoxicity against three murine cancer cell lines: mammary adeno-carcinoma (LM3), lung adenocarcinoma (LP07) and mouse fibroblast (L929) cells. Relating the series of compounds to their biological activities we found compound 6 as the most promising of them.