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20:18, ter mai 22








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. 5, 2018, p. 485-599

 

Submission procedures for OPEN ACCESS

The Board of Directors of the Sociedade Brasileira de Química-SBQ (publisher of the Química Nova-QN) decided that QN will adopt the full open access format in which authors are required to cover part of the publication costs for their articles. See more...



Artigo de Capa
Quim. Nova 2018, 41(5), 567-576

BIOGENIC SYNTHESIS OF IMPORTANT ENVIRONMENTAL MINERALS: MAGNESIUM PHOSPHATE COMPOUNDS AND PERSPECTIVES

Nelson Durán; Wagner J. Favaro

Bacteria, fungi, yeast and Trypanosome biomineralizations play a critical role in biogeochemical cycles. These processes have important technological and environmental applications. This review shows the recent progress in biogenic magnesium phosphate compound.

http://dx.doi.org/10.21577/0100-4042.20170204

Publicado online: fevereiro 22, 2018
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Artigos Quim. Nova 2018, 41(5), 485-491

 

CHEMICAL COMPOSITIONS AND ANTIOXIDANT AND ANTIMICROBIAL ACTIVITIES OF PROPOLIS PRODUCED BY Frieseomelitta longipes AND Apis mellifera BEES

Edineide Cristina A. de Souza; Etyene Janyne G. da Silva; Hayron Kalil C. Cordeiro; Nauara M. Lage Filho; Felipe M. A. da Silva; Diany Lucy S. dos Reis; Carla Porto; Eduardo J. Pilau; Luiz Antonio M. A. da Costa; Afonso D. L. de Souza; Cristiano Menezes; Adriana Flach


Chemical compositions of the propolis of Apis mellifera and Frieseomelitta longipes and determination of their biological activities.

http://dx.doi.org/10.21577/0100-4042.20170208

Publicado online: fevereiro 28, 2018
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Quim. Nova 2018, 41(5), 492-496

 

THERMOGRAVIMETRIC APPROACH FOR ASSESSING THE OXIDATION LEVEL OF A BIODIESEL SAMPLE

Luis Díaz-Ballote; Karen Gómez-Hernández; Elsy T. Vega-Lizama; Miguel A. Ruiz-Gómez; Luis Maldonado; Emanuel Hernández


Samples of biodiesel were first exposed to an accelerated oxidation process and then thermally decomposed. The final mass measured on the weight loss curve was used for assessing its oxidative level.

http://dx.doi.org/10.21577/0100-4042.20170199

Publicado online: fevereiro 8, 2018
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Quim. Nova 2018, 41(5), 497-506

 

SÍNTESE E AVALIAÇÃO DA ATIVIDADE CITOTÓXICA DE DERIVADOS DO EUGENOL CONTENDO NÚCLEOS 1,2,3-TRIAZÓLICOS

Poliana Aparecida Rodrigues Gazolla; Róbson Ricardo Teixeira; Adalberto Manoel da Silva; Boniek Gontijo Vaz; Géssica Adriana Vasconcelos; Raoni Pais Siqueira; Victor Hugo Sousa Gonçalves; Higor Sette Pereira; Gustavo Costa Bressan


Triazolic derivatives of eugenol were prepared and had their cytotoxicity evaluated.

http://dx.doi.org/10.21577/0100-4042.20170206

Publicado online: fevereiro 22, 2018
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Quim. Nova 2018, 41(5), 507-511

 

REACTIVE MOLECULAR DYNAMICS SIMULATION AND CHEMICAL KINETIC EVALUATION OF COMBUSTION OF TRIETHYLALUMINIUM (TEA)

Rene F. B. Gonçalves; Koshun Iha; José A. F. F. Rocco


Potential energy variation for triethylaluminum combustion under different temperatures in NVE-MD simulations.

http://dx.doi.org/10.21577/0100-4042.20170200

Publicado online: fevereiro 22, 2018
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Quim. Nova 2018, 41(5), 512-518

 

AVALIAÇÃO DA ADSORÇÃO E ESTUDO ELETROQUÍMICO DE CÉLULAS SOLARES PRODUZIDAS COM TIO2 E CORANTE EXTRAÍDO DO HIBISCUS

Gideã T. Tractz; Guilherme A. R. Maia; Bianca V. Dias; Franciely Ignachewski; Paulo R. P. Rodrigues


Dye sensitized solar cell (DSSC) can be prepared with natural dyes, such as Hibiscus. Photovoltaic parameters and a model capable of predicting the adsorption mechanism of the dye on the TiO2 surface are investigated in this paper.

http://dx.doi.org/10.21577/0100-4042.20170212

Publicado online: março 8, 2018
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Quim. Nova 2018, 41(5), 519-527

 

ÓXIDO DE ÍTRIO E ALUMÍNIO DOPADO COM Yb3+ E Er3+ INCORPORADO EM MEMBRANA DE POLIAMIDA

Michel L. de Souza; Susane B. Moscardini; Emerson H. de Faria; Katia J. Ciuffi; Lucas A. Rocha; Eduardo J. Nassar; Jorge V. L. Silva; Marcelo F. Oliveira; Izaque A. Maia


The article describes the incorporation of the yttrium aluminum oxide doped with Yb3+ and Er3+ incorporated into polyamide membrane obtained by Additive Manufacture. This work presents potential applications to transform infrared radiation into visible, upconversion.

http://dx.doi.org/10.21577/0100-4042.20170201

Publicado online: fevereiro 22, 2018
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Quim. Nova 2018, 41(5), 528-532

 

SELF-ASSEMBLY AND HOST-GUEST BEHAVIORS OF A SUPRAMOLECULAR HELICATE FEII2L3

Xiao-Huan Fu; Wen-Yuan Wu; Peng Jiang; Zhen-Yu Han; Rong Wan


A novel helicate [Fe2L3]4+ resulted from the subcomponent self-assembly of a C3-symmetric triamine, iron(II) and 2-formylpyridine. The supramolecular studies showed that the size, functional group and symmetry of guest molecules remarkably influenced the host-guest interaction patterns.

http://dx.doi.org/10.21577/0100-4042.20170217

Publicado online: março 21, 2018
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Quim. Nova 2018, 41(5), 533-539

 

COMO OBTER NANOPARTÍCULAS DE OURO USANDO SUCO DE LIMÃO?

Mariana F. Coura; Guilherme Arroyos; Lilian Cherubin Correia; Regina C. G. Frem


This work shows the use of lemon varieties as natural reducing agents for the preparation of gold nanoparticles from two different metallic precursors. UV-Vis spectra of the red colloidal solutions show bands at ~ 520 nm corresponding to particle sizes of 5-25 nm.

http://dx.doi.org/10.21577/0100-4042.20170202

Publicado online: fevereiro 22, 2018
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Quim. Nova 2018, 41(5), 540-543

 

NEW ALKYL PHENOLS AND FATTY ACID PROFILE FROM OILS OF PULPED Spondias mombin L. SEED WASTES

Larissa C. de Rezende; Patricia de A. Santos; Valéria B. Riatto; Jorge M. David; Juceni P. David


Waste seed oils of Spondias mombin presents mostly unsaturated fatty acid, phytosteroids and two new alkenyl phenols.

http://dx.doi.org/10.21577/0100-4042.20170203

Publicado online: fevereiro 22, 2018
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Quim. Nova 2018, 41(5), 544-549

 

PREPARAÇÃO, CARACTERIZAÇÃO FÍSICO-QUÍMICA E LIBERAÇÃO CONTROLADA DE MICROPARTÍCULAS DE GALACTOMANANA CONTENDO ALANTOÍNA

Hilana B. M. Frota; Jane Eire S. A. Menezes; Sônia Maria C. Siqueira; Nágila Maria P. Ricardo; Tamara G. Araújo; Carlos Alberto G. Souza; Paulo N. Bandeira; Hélcio S. dos Santos


Allantoin was encapsulated with galactomannan extruded from Delonyx regia.

http://dx.doi.org/10.21577/0100-4042.20170214

Publicado online: março 8, 2018
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Revisão Quim. Nova 2018, 41(5), 550-566

 

O-GLICOSÍDEOS 2,3-INSATURADOS: APLICAÇÕES, REARRANJO DE FERRIER E REAÇÕES

Aldiceia Luiz de Moura; Lidiane Macedo Alves de Lima; Giselle Barbosa Bezerra; Jucleiton J. R. de Freitas; Mônica Freire Belian; Clécio Souza Ramos; Rodrigo André Avelino; João R. de Freitas Filho


This review summarizes recent developments, in the last twenty years, about the Ferrier rearrangement reaction involving synthesis, mechanistic proposal and application of 2,3-unsaturated O-glycosides.

http://dx.doi.org/10.21577/0100-4042.20170209

Publicado online: fevereiro 28, 2018
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Nota Técnica Quim. Nova 2018, 41(5), 577-580

 

MÉTODOS AMBIENTALMENTE AMIGÁVEIS PARA A IODAÇÃO REGIOSSELETIVA DA 3,7,3',4'-TETRAMETOXI-QUERCETINA

Ingrid T. L. Ramos; Telma M. G. da Silva; Tania M. S. da Silva; Celso A. Camara


Environmental friendly methods for regioselective iodination of the 3,7,3',4'-tetramethoxy-quercetin. Neat reation and aprotic polar solvent selective C-6, protic polar solvent selective C-8 and excess iodine reagent selective di-iodination.

http://dx.doi.org/10.21577/0100-4042.20170205

Publicado online: fevereiro 22, 2018
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Quim. Nova 2018, 41(5), 581-586

 

LIXIVIAÇÃO ÁCIDA DE BATERIAS ÍON-LÍTIO

Rafael Gundim Silva; Júlio Carlos Afonso; Claudio Fernando Mahler


Leaching of spent lithium-ion batteries under mild experimental conditions using weak and strong acids. Co(II) was extracted by D2EHPA at pH ~5. Lithium salts can be directly precipitated from the raffinate.

http://dx.doi.org/10.21577/0100-4042.20170207

Publicado online: fevereiro 22, 2018
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Educação Quim. Nova 2018, 41(5), 587-593

 

EXPLAINING THE GEOMETRY OF SIMPLE MOLECULES USING MOLECULAR ORBITAL ENERGY-LEVEL DIAGRAMS BUILT BY USING SYMMETRY PRINCIPLES

Sérgio P. Machado; Roberto B. Faria


Qualitative energy-level molecular diagrams for different geometry allow to explain the preferred geometry of simple molecules on basis of the number of nonbonding electrons.

http://dx.doi.org/10.21577/0100-4042.20170198

Publicado online: fevereiro 8, 2018
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Quim. Nova 2018, 41(5), 594-599

 

UM ESTUDO TERMODINÂMICO DA CORROSÃO DOS AÇOS CARBONO PELO SULFETO DE HIDROGÊNIO - EXPLORANDO CONCEITOS DE EQUILÍBRIO QUÍMICO

Mariana Cristina de Oliveira; Alexandre Pereira de Lima; Rodrigo Monzon Figueredo; Heloisa Andréa Acciari; Eduardo Norberto Codaro


Schematic representation of possible reaction pathways in the corrosion of carbon steel by hydrogen sulfide.

http://dx.doi.org/10.21577/0100-4042.20170186

Publicado online: janeiro 18, 2018
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