Molecular Liquids
Mostrando 1-12 de 47 artigos, teses e dissertações.
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1. Thermophysical and Transport Properties of the BaCl2-CsCl High Temperature Ionic Liquid Mixtures
High temperature ionic liquids (HTILs) densities and transport properties for mixtures BaCl2 CsCl, x(BaCl2) = 0-1, have been studied as a function of composition and temperature. In terms of Arrhenius theory, the temperature correlation of all measured properties was made and discussed. Thermodynamic properties (isothermal compressibility, molecular volume,
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. What is new in non-chromatographic flavonoid purification?
Flavonoids are metabolites occurring in all plant tissues and present different biological activities. They occur in a mixture of similar polarity with laborious separation and purification processes, usually furnishing low yields. Semi-preparative chromatographic methods are universally employed procedures for their isolation. This paper discusses the state
Química Nova. Publicado em: 2022
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3. Termogravimetric Characterization of Biomass Impregnated with Biodegradable Ionic Liquids
ABSTRACT Different classes of solvents such as mineral acids and ionic liquids have proved to be capable of disrupting hydrogen bonds among different polysaccharide chains. Recently, a specific family of proticionic liquids (PILs) has been developed with functionality in various industrial applications, adding to the benefits and advantages of their use, sin
Floresta Ambient.. Publicado em: 23/09/2019
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4. Seroprevalence of Bartonella spp., Coxiella burnetii, and Hantavirus among people who inject drugs in Rio de Janeiro, Brazil: a retrospective assessment of a biobank
ABSTRACT The increasing use of illicit drugs imposes a public health challenge worldwide. People who inject drugs (PWID) are more susceptible to health complications due to immunosuppression associated with drug use and non-hygienic self-administration of substances, contaminants, and liquids. PWID are subjected to increased risk of acquiring and transmittin
Rev. Inst. Med. trop. S. Paulo. Publicado em: 19/07/2018
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5. CHEMICAL DEMULSIFICATION OF MODEL WATER-IN-OIL EMULSIONS WITH LOW WATER CONTENT BY MEANS OF IONIC LIQUIDS
Abstract The demulsification of model water-in-oil (w/o) emulsions containing 1% wt. water by [Omim][PF6] and Aliquat® 336 ionic liquids (IL) as demulsifiers was investigated in batch mode at different temperatures (30, 45 and 60 °C) and demulsifier concentrations (2.5×10‒3, 1.2×10‒2 and 2.9×10‒2 mol L‒1). The model oil is a mixture n-heptane/to
Braz. J. Chem. Eng.. Publicado em: 2017-01
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6. Self-Assembled Networks and Molecular Gels Derived from Long-Chain, Naturally-Occurring Fatty Acids
Self-assembly of molecular gelators in a variety of liquids provides an attractive route for the construction of nanostructured materials with desired functionalities. This review focuses on correlations between structural features of gelators, specifically derivatives of long-chain, naturally-occurring fatty acids in which functional groups have been modifi
J. Braz. Chem. Soc.. Publicado em: 2016-02
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7. Self-Organization in Ionic Liquids: From Bulk to Interfaces and Films
In this contribution we present an overview on the relation between the complex structure of ionic liquids (ILs) and its impact in the field of surface science. The results herein described result mainly from modeling and simulation work carried out at Centro de Química Estrutural, Universidade de Lisboa, complemented in some cases by experimental results o
J. Braz. Chem. Soc.. Publicado em: 2016-02
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8. Simulações de líquidos super-resfriados via dinâmica molecular
This work presents the study of two models of glass-forming liquids using molecular dynamics simulations. The first model aims to analyze the effects on glassy dynamics which allow the enhancement of the glass formability on metallic glass formers. The Pd45Ni55 binary alloy and the Pd35Ni55Pt10 ternary one are modeled via the Embedded Atom method interaction
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/10/2012
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9. Mobilidade ionica acoplada a espectrometria de massas : interferencia de parametros do drift gas na resolução de anilinas substituidas e determinação da mobilidade intrinsica de agregados de liquidos ionicos / Ion mobility mass spectrometry : interference of drift gas parameters on the resolution of substituted anilines and determination of intrinsic mobility of ionic liquids aggregates
Ion mobility spectrometry separates ions with different sizes or spacial conformations in gas phase according to the time they take to travel through a gas under the influence of an electrical field. Coupling this technique to mass spectrometry provides an extremely versatile tool, able to investigate molecular structure and separate complex samples, includi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
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10. Aerobic, catalytic oxidation of alcohols in ionic liquids
Um sistema catalítico simples e eficiente, baseado em RuCl3 imobilizado em líquidos iônicos, foi desenvolvido para oxidar álcoois a aldeídos e cetonas sob condições brandas. Um novo líquido iônico fluorado, pentadecafluorooctanoato de 1-n-butil-3-metilimidazólio, foi sintetizado e demonstrou melhor desempenho que os demais líquidos iônicos empreg
Publicado em: 2010
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11. Efecto del catión, del anión y del co-ión sobre la agregación de líquidos iónicos en solución acuosa
The aggregation behavior of thirteen 1-alkyl-3-methylimidazolium based ionic liquids in aqueous solution is presented, considering variations of the alkyl side chain length as well as the anionic moiety. Cation and anion molecular volumes are selected as appropriate molecular descriptors. Additionally, the existing relationship between critical micelle conce
Química Nova. Publicado em: 2010
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12. Estudo da adsorção do líquido iônico [BMIM]+[BF4]sobre γ-Al2O3 por cálculos ab initio
Ionic liquids are, by definition, salts formed by an organic cation and an inorganic anion, with a low melting point. An important application of ionic liquids is that they can replace conventional solvents. Recently, they were also used as cocatalysts (in the form of solvents) for metallic clusters, in the process of removal of aromatics from petroleum. The
Publicado em: 2010