Supramolecular Systems
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Supramolecular Approach in Energy Conversion Devices
This review summarizes investigations carried out at the Laboratory of Photochemistry and Energy Conversion (LFCE) in the University of São Paulo dealing with design and characterization of ruthenium(II), rhenium(I) and iridium(III) polypyridine complexes with desired photochemical and photophysical properties in light of the development of optoelectronics
J. Braz. Chem. Soc.. Publicado em: 2020-11
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2. ESQUARAÍNAS CIS E TRANS SUBSTITUÍDAS: APLICAÇÃO EXPERIMENTAL DA TEORIA DE GRUPO EM ESPECTROSCOPIA VIBRACIONAL
This work shows a practical application of the group theory to a relatively simple molecular system, as well its impact in the results obtained through vibrational spectroscopic techniques. Squaraines substituted by dicyanemethylene groups have been extensively studied, and after minor approaches in the sense to facilitate the point group determination, they
Quím. Nova. Publicado em: 05/12/2019
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3. O PRÊMIO NOBEL DE QUÍMICA EM 2016: MÁQUINAS MOLECULARES
The Nobel Prize in Chemistry 2016 was granted to Jean-Pierre Sauvage, Sir James F. Stoddart and Bernard (Ben) L. Feringa. These scientists were responsible for the creation and development of molecular machines. The development of such systems represents a breakthrough in the field of supramolecular chemistry, nanotechnology and organic synthesis. This artic
Quím. Nova. Publicado em: 2017-01
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4. Síntese e caracterização de nanoestruturas peptídicas: estudos espectroscópicos e aplicações / Synthesis and characterization of peptide nanostructures: spectroscopic studies and applications
The study had as aimed the development of nanostructured materials based on processes of molecular self-assembly of peptide compounds in order to obtain systems of great structural versatility seeking possible applications related to bionanotechnology. In this regard, peptide sequences based on linear and cyclic precursors were synthesized by solid-phase met
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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5. O uso de RMN para estudar a estrutura da água em interfaces e sistemas coloidais / The use of NMR to study the structure of water at interfaces and colloidal systems
O modelo de dois sítios, utilizado nos estudos de relaxação do solvente em soluções de carboidratos, pode ser transposto de forma satisfatória para soluções de polímeros hidrofílicos. Polímeros que possuem hidrogênios lábeis, isto é, que possuem hidrogênios disponíveis para troca química com os hidrogênios da água, causam aumento da taxa d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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6. Calix[n]arenos como sistemas de encapsulamento e plataforma para catalisadores assimétricos / Calix[n]arenes as encapsulation systems and platform for asymmetric catalysts
A química supramolecular tem evoluído ao longo das últimas três décadas, e tem se mostrado um campo extremamente dinâmico e verdadeiramente interdisciplinar. O presente trabalho teve por meta sintetizar derivados do p-tert-butilcalix[4 e 6]areno, visando aplicá-los como plataforma para ligantes assimétricos e sistemas carreadores da isoniazida. Prime
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
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7. Hemoglobina extracelular gigante de Glossoscolex paulistus: um extraordinário sistema supramolecular hemoproteico
Giant extracellular hemoglobins are considered the summit of complexity in systems that carry oxygen, constituting an extraordinary model system to the study of hemoproteins. This class includes the hemoglobin of the annelid Glossoscolex paulistus that presents high cooperativity, great oligomeric and redox stabilities and ability of oligomeric reassociation
Química Nova. Publicado em: 2011
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8. Hybrid metal-organic nanocomposites based on vandium pentoxide / Nanocompósitos híbridos metal-orgânicos baseados em pentóxido de vanádio
Nanostructured systems based on the intercalation of molecular and supramolecular species into lamellar vanadium pentoxide xerogels are focused on this Thesis. The exciting characteristics of the supramolecular systems which are closely related to the nature, interaction and organization of the chemical species involved, have been exploited aiming their appl
Publicado em: 2008
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9. Phase equilibrium and structural characterizarion of systems composed by polyanions and cationic surfactants / Equilibrio de fases e caracterização estrutural de sistemas contendo polianions e surfatantes cationicos
Polieletrólitos associam-se fortemente com surfatantes de carga oposta em meio aquoso, levando a uma separação de fases que resulta em uma fase concentrada, rica em polieletrólito e surfatante, em equilíbrio com uma fase diluída constituída pelos contra-íons. A fase concentrada pode ser constituída de interessantes estruturas supramoleculares advind
Publicado em: 2008
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10. Síntese de bisporfirinas contendo o espaçador 2,2-bipiridina: modelos na elaboração de sensores luminescentes de íons metálicos / Synthesis of bisporphyrins held together by the 2,2-bipyridine spacer: models in the elaboration of luminescent sensors for metal ions
In this work have been synthesized bisporphyrins held together by means of amide linkage at the 4,4position of 2,2-bipyridine, reacting the mono-functionalised aminophenyl-porphyrin (NH2PTriPP) and 4,4-diacid chloride bipyridine (DACBipy). A preliminary study was conducted for the establishment of the reaction conditions for the attainment of mono(nitropheny
Publicado em: 2008
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11. Cristais líquidos colestéricos: a quiralidade revela as suas cores
Chirality deeply impacts the macroscopic properties on all scales of the universe from elemental particles through biological structures up to astronomic systems. Specifically, chiral liquid crystals give rise to self-organized macrostructures with unparalleled properties. Here we present easy experiments with a special class of chiral liquid crystals that s
Química Nova. Publicado em: 2007
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12. Estudo e caracterização estrutural e termodinâmica de compostos de inclusão formados entre antidepressivos e ciclodextrinas
In this work the supramolecular systems stabilized by the non-covalent interactions, formed by association of the ß-cyclodextrin with a bicyclic and a tricyclic antidepressant, Fluoxetine and Imipramine respectively, were investigated by spectroscopies techniques (FT-IR, FTIR-HATR and NMR), thermal analysis (TGA and DSC) and also by calorimetric technique (
Publicado em: 2007