Supramolecular Chemistry
Mostrando 25-36 de 53 artigos, teses e dissertações.
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25. Supramolecular chemistry of tetrapyridylporphyrins associated with platinum(II) complexes / Química supramolecular de tetrapiridilporfirinas associadas a complexos de platina(II)
The synthesis, characterization and investigation of the molecular and supramolecular behaviour of meso-tetrapyridylporphyrins containing four chloro(bipyridine) platinum(II) complexes attached at the meta and para positions of the peripheral pyridine ligands is focused on this thesis. The isomeric supermolecules were isolated in the solid state, and extensi
Publicado em: 2006
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26. Theoretical and experimental study on supramolecular structures obtained with trinuclear ruthenium clusters and porphyrins / Estudo teórico e experimental de estruturas supramoleculares obtidas com clusters trinucleares de rutênio e porfirinas
A química supramolecular de porfirinas e clusters trinucleares de rutênio foi investigada sob o ponto de vista teórico-experimental. Através do desenvolvimento de uma nova metodologia baseada em ferramentas teóricas, as propriedades desses sistemas puderam ser explicadas à luz da mecânica quântica, revelando os mecanismos eletrônicos envolvidos na m
Publicado em: 2005
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27. Estudo de complexos polimetalados contendo espécies biologicamente Ativas de rutênio/dirutênio" / Study of polynuclear metal complexes containing biologically active ruthenium/diruthenium units
Os complexos de rutênio há algumas décadas são estudados visando à aplicação em medicina, catálise e fotoquímica. Particularmente, com interesse voltado para a área médica, novos compostos têm sido desenvolvidos para substituir a cis-platina no tratamento do câncer, uma vez que este medicamento atua numa gama restrita de tipos de tumores e apres
Publicado em: 2005
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28. Synthesis and properties of supermolecular meso tetra(pyridyl)porphyrins and its layer-by-layer electrostatic assembled nanomaterials / Obtenção e propriedades de meso tetra(piridil)porfirinas supermoleculares e dos nanomateriais obtidos por montagem eletrostática camada por camada
A new series of nonplanar supermolecular metalloporphyrins have been obtained by coordenative self-assembly of meso-tetra(3-pyridyl)porphyrins and ruthenium complexes such as [Ru(bipy)2Cl]+ and [Ru(bipy)2(OH2)]2+. The electronic and structural properties have been investigated by electronic spectroscopy, mass spectrometry, cyclic voltammetry, and spectroelec
Publicado em: 2005
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29. Interfaces and devices based on supramolecular porphyrins / Interfaces e dispositivos baseados em porfirinas supramoleculares
Neste trabalho são descritas as propriedades morfológicas, condutoras, fotoeletroquímicas e eletrocatalíticas de filmes de porfirinas supramoleculares, contendo complexos de rutênio polipiridina e clusters trinucleares de rutênio. Foram empregadas técnicas de microscopia de varredura por sonda, voltametria cíclica, espectroscopia de impedância eletr
Publicado em: 2004
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30. Proteins with mechanical functionality: a physico-chemical study on the viscoelasticity of gliadin, a storage protein from wheat gluten / Proteínas com funcionalidade mecânica: um estudo físico-químico sobre a viscoelasticidade da gliadina, uma proteína de reserva do glúten do trigo
The thesis consisted in a rheological study of the dynamics of gels and dispersions of gliadin from wheat gluten in pure dimethylsulfoxide, dimethylformamide or formamide and in their mixtures with water. The effect of temperature and that of the concentration of the component species (protein and solvent constituents) on flow behavior and deformation were e
Publicado em: 2004
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31. Química de sistemas supramoleculares constituídos por porfirinas e complexos metálicos
Supramolecular chemistry is expected to keep a high developing pace in the next years, giving support to the advancement of molecular devices and nanotechnology. In this sense, porphyrins and their analogues should play a significant role as a consequence of their catalytic, electrocatalytic, photochemical and photoelectrochemical properties. In this review
Química Nova. Publicado em: 2002-11
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32. Desenvolvimento de sistemas polinucleares baseados em clusters trinucleares e complexos poliimínicos de rutênio: unidades de montagem em química supramolecular / Development of polynuclear systems based on trinuclear cluster and polyimines ruthenium compounds: building blocks in supramoleular chemistry
The aim of the work reported is to develop polynuclear structures based on trinuclear ruthenium clusters. All the oligomers are seen as interesting options to the future development of supramolecular devices, due to their photophysical and electrochemical properties. A series of mixed dimers and one trimer were obtained by the combination of the [Ru3O(CH3COO
Publicado em: 2002
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33. Supramolecular chemistry and technology
Supramolecular chemistry deals with the association of several chemical species, in an organized way and according to well defined purposes. Based on a molecular engineering approach, supramolecular structures can be designed from pre-formed building blocks, providing a promising route from chemistry to molecular nanotechnology. New supramolecular systems ha
Anais da Academia Brasileira de Ciências. Publicado em: 2000-03
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34. Porfirinas pentacianoferrato e estruturas supramoleculares auto-organizadas / New pentacyanoferrate porphyrin and supramolecular self-assembled structures
The present work describes the synthesis and spectroscopic and electrochemical properties of meso-{tetrakis-(3 pyridylpentacyanoferrate)} porphyrin (PPCF) and its Prussian Blue type materiais, obtained by self-assembly reaction between the new porphyrin and transition metal ions. The new materiais were characterized by Mass, UV -Vis, Infrared, Resonance Rama
Publicado em: 2000
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35. Supramolecular properties of polynuclear porphyrins / Propriedades supramoleculares de porfirinas polinucleares
A síntese e a caracterização de uma série de porfirinas polinucleares, por meio de análise elementar, espectroscopia eletrônica e Raman ressonante, voltametria cíclica e espectroeletroquímica, são apresentadas nesta tese. Estas supermoléculas foram obtidas pela coordenação de quatro grupos Ru(edta)- ou Ru(bipY)2Cl+ aos resíduos piridínicos das
Publicado em: 1994
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36. Synthesis and properties of new polymetalated porphyrins / Sintese e propriedades de novas porfirinas polimetaladas
Metalloporphyrins containing peripheral meta l complexes attached to the macrocyclic ring can exhibit an interesting supramolecular chemistry, modeling , for instance, photosynthetic systems in their ability to undergo intramolecular photocatalyzed electron transfer; and cytochrome-c oxidase , by acting as multielectron redox catalysts in the reduction of mo
Publicado em: 1989