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Autores: A partir do fascículo 39/9 a revista Química Nova adotou a licença CC-BY. Mais informações a respeito dessa licença podem ser obtidas aqui.

Edição Atual vol. 41, No. 7, 2018, p. 719-838

 

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Artigo de Capa
Quim. Nova 2018, 41(7), 725-731

Imobilização de complexo de rutênio contendo base de Schiff na unidade metalo-orgânica UiO-67

Herculys B. Jorge; Cleiser T. P. da Silva; Helena S. Nakatani; Andrelson W. Rinaldi; Vagner R. De Souza*

Zr-based metal-organic framework with bipyridine dicarboxylate moieties (UiO-67) has been utilized for the immobilization of ruthenium(II) Schiff base complex.

http://dx.doi.org/10.21577/0100-4042.20170238

Publicado online: maio 22, 2018
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Artigos Quim. Nova 2018, 41(7), 719-724

 

Ethylene polymerization with nickel diimine complexes containing pseudohalides

Marcos L. DiasI,*; Luciana P. SilvaII; Geraldo L. CrossettiIII; Carlos A. L. FilgueirasIV


Nickel-diimine complexes containing the pseudo-halide ligands isothyocyanate and isoseleniumcyanate were synthesized and used in ethylene polymerization giving branched polyethylene in high yield.

http://dx.doi.org/10.21577/0100-4042.20170237

Publicado online: maio 22, 2018
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Quim. Nova 2018, 41(7), 732-742

 

Validation of computational methods applied in molecular modeling of caffeine with epithelial anticancer activity: theoretical study of geometric, thermochemical and spectrometric data

Josivan da Silva CostaI,II,III,*, Cleydson Breno Rodrigues dos SantosI,II, Karina da Silva Lopes CostaII, Ryan da Silva RamosII, Carlos Henrique Tomich de Paula da Silva,IV and Williams Jorge da Cruz MacêdoIII


Validation methods of theoretical models show importance in the evaluation of efficiency, reliability and magnitude of errors in theoretical data calculations, allowing the selection of better methods with greater representativeness and correspondence with experimental data.

http://dx.doi.org/10.21577/0100-4042.20170239

Publicado online: maio 22, 2018
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Quim. Nova 2018, 41(7), 743-747

 

Influência do método extrativo no teor de flavonoides de Cnidoscolus quercifolius pohl (Euphorbiaceae) e atividade antioxidante

Daniel da S. TorresI; Emanuella C. V. PereiraI; Pedrita A. SampaioI; Nathália A. C. de SouzaI; Christiane A. A. FerrazII; Ana P. de OliveiraI,II; Celuane A. MouraII; Jackson R. G. S. AlmeidaI,II; Pedro J. Rolim-NetoIII; Raimundo G. de Oliveira-JúniorI,II; Larissa A. RolimI,II,*


Influence of extraction process on flavonoid content from Cnidoscolus quercifolius (Euphorbiaceae) and antioxidant activity.

http://dx.doi.org/10.21577/0100-4042.20170236

Publicado online: maio 16, 2018
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Quim. Nova 2018, 41(7), 748-755

 

Avaliação do papel do óxido de grafeno (GO) na geração fotocatalítica de hidrogênio em sistemas binários (GO-CdS) e ternários (Pt-GO-CdS)

Cristiane Gomes AlmeidaI, Tuany Nascimento dos Santos TrindadeI, Marcus Vinicius Santos da SilvaIII e Luciana Almeida SilvaI,II,*


Reduced graphene oxide acts as an electron trapping provided by photoexited CdS in the Pt(RGO/CdS) composite. Such photogenerated electrons can be transferred to adsorbed water molecules on its surface and/or to the platinum nanoparticles that also promote the reduction of H2O to H2, while the photogenerated holes can oxide sulfide ions to polysulfides on CdS surface.

http://dx.doi.org/10.21577/0100-4042.20170255

Publicado online: junho 26, 2018
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Quim. Nova 2018, 41(7), 756-761

 

Preparation and characterization of nanoemulsion containing a natural naphthoquinone

Fernando V. S. RodriguesI,#, Laerte S. DinizII, Rosa M. G. SousaII, Thalita D. HonoratoII, Daniele O. SimãoI,#, Cleônia R. M. AraújoII, Talita M. GonçalvesII, Larissa A. RolimI,II,#, Patrícia L. GotoIII, Antonio C. TedescoIII and Marigilson P. Siqueira-MouraI,II,*,#


Photoimages of (a) NE containing lapachol at 1 mg mL-1 (F2-Lp) and (b) unloaded F2 NE. Results from F2-Lp formulation of droplet size distribution (top right) and analytic centrifugation with LUMiSizer® (bottom image).

http://dx.doi.org/10.21577/0100-4042.20170247

Publicado online: junho 7, 2018
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Quim. Nova 2018, 41(7), 762-769

 

Production, characterization and usage of a novel disulfonic acid-functionalized ionic liquid as a highly efficient and dual-functional catalyst for the synthesis of 1,8-dioxo-9,10-diaryl-decahydroacridines

Mostafa Karam; Abdolkarim Zare*,#


Preparation of [TMEDSA][TFA]2 and synthesis of 1,8-dioxo-9,10-diaryl-decahydroacridines catalyzed by this novel ionic liquid.

http://dx.doi.org/10.21577/0100-4042.20170245

Publicado online: junho 7, 2018
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Quim. Nova 2018, 41(7), 770-777

 

Separation of zinc from manganese by solvent extraction from acidic leachates of spent zinc-MnO2 dry cells using neutral organophosphorus extractants

Vinício Francisco IbiapinaI; Júlio Carlos AfonsoI,*; Rubens Souza da SilvaII; Cláudio Augusto ViannaII; José Luiz MantovanoII


Efficient leaching of spent zinc-MnO2 dry cells under mild experimental conditions using strong acids. Zn(II) was preferably extracted over Mn(II) by TBP or Cyanex 923.

http://dx.doi.org//10.21577/0100-4042.20170249

Publicado online: junho 19, 2018
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Quim. Nova 2018, 41(7), 778-781

 

Isolation of cytotoxic neolignans from Saururus cernuus L. (Saururaceae) using ionic liquid in the microwave assisted extraction (MAE)

Juliana R. BritoI; Fernanda F. CamiloI; Carlos R. FigueiredoII; Ricardo A. AzevedoII; Paulete RomoffIII; Fátima O. S. ButuriIV; Oriana A. FáveroV; João Henrique G. LagoVI,*; Edgard A. FerreiraIII,#


Leaves of Saururus cernuus (Saururaceae) were extracted using BMImBr and H2O in a MAE system. Using a bioactivity guided fractionation (cytotoxic assay) were obtained four related neolignans (1-4).

http://dx.doi.org/10.21577/0100-4042.20170246

Publicado online: junho 7, 2018
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Revisão Quim. Nova 2018, 41(7), 782-795

 

Éteres difenílicos polibromados (PBDE) como contaminantes persistentes: ocorrência, comportamento no ambiente e estratégias analíticas

Daniel L. R. AnnunciaçãoI; Fernanda V. AlmeidaI; Emerson L. Y. HaraII; Marco T. GrassiII; Fernando F. SodréI,*


The spread of PBDEs is a subject of recent concern due to their adverse effects and persistency. Thus, it is important to assess their concentrations in different matrices in order to better understand their behavior and fate in the environment.

http://dx.doi.org/10.21577/0100-4042.20170218

Publicado online: março 21, 2018
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Quim. Nova 2018, 41(7), 796-809

 

Especiação dinâmica de metais traço em ambiente aquático usando cronopotenciometria de redissolução anódica

Adnívia Santos Costa MonteiroI,III,#; Danielle GoveiaII; Elise RotureauIV; André Henrique RosaI,*; Jorge Cesar MasiniIII; José Paulo PinheiroIV


The figure shows generic profiles of SSCP curves for situations of inert (a), labile (b) and quasi-labile (c) complexes for Cd(II) in the presence of ligands.

http://dx.doi.org/10.21577/0100-4042.20170242

Publicado online: maio 22, 2018
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Nota Técnica Quim. Nova 2018, 41(7), 810-813

 

Cork membrane for efficient oil and water separation

Yanbiao Zhou*; Binghua Liao; Kaige Qu; Lihui Zhang and Luyang Ye


Fabrication of the FDTS-modified cork membrane and separation of oil/water mixtures.

http://dx.doi.org/10.21577/0100-4042.20170235

Publicado online: maio 9, 2018
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Educação Quim. Nova 2018, 41(7), 814-817

 

Measuring the conductivity of very dilute electrolyte solutions, drop by drop

Leandro MartínezI,II


The conductivity of millimolar electrolyte solutions can be studied in undergraduate laboratory experiments by dropping electrolyte solutions in deionized water.

http://dx.doi.org/10.21577/0100-4042.20170216

Publicado online: março 19, 2018
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Quim. Nova 2018, 41(7), 818-824

 

Revisiting ideal gases and proposal of a simple experiment for determining atmospheric pressure in the laboratory

Leonardo M. Da Silva*; Arthur H. de Castro


Experimental apparatus for determining atmospheric pressure in the laboratory.

http://dx.doi.org/10.21577/0100-4042.20170221

Publicado online: março 29, 2018
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Quim. Nova 2018, 41(7), 825-832

 

Topologia dos orbitais moleculares de polienos para deduzir energias relativas e avaliar aromaticidade

Silvio Cunha


A didactic alternative approach is proposed for deducing molecular orbital topology of acyclic and cyclic conjugated polyenes, relative energies, and orbital degeneracy to cyclic polyenes and their aromatic or antiaromatic character.

http://dx.doi.org/10.21577/0100-4042.20170231

Publicado online: abril 10, 2018
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Assuntos Gerais Quim. Nova 2018, 41(7), 833-838

 

Considerações sobre textos que tratam do desenvolvimento de metalofármacos de rutênio

Sofia Nikolaou*; Camila F. N. da Silva


This work proposes a discussion on the construction of texts that deal with the biological properties of ruthenium complexes and their application as metallodrugs, aiming to criticize the misuse of some generalizations about the chemistry of this element.

http://dx.doi.org/10.21577/0100-4042.20170228

Publicado online: abril 10, 2018
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