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Autores: informamos que, a partir do próximo fascículo (39/9), a revista Química Nova adotará a licença CC-BY. Mais informações a respeito dessa licença podem ser obtidas aqui.

vol. 38, No. 10, 2015, p. 1253-1378

 

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 2015, 38(10), 1323-1338

Métodos seletivos de fluoração de moléculas orgânicas

Núbia BoechatI,*; Angelo da Cunha PintoII; Mônica Macedo BastosI

Selective C-F formations: fluorine transfer by nucleophilic, electrophilic, and enzymatic methods. The most common fluorination reagents and a fluorinase.

http://dx.doi.org/10.5935/0100-4042.20150140

Publicado online: agosto 31, 2015
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Artigos Quim. Nova 2015, 38(10), 1253-1259

 

Avaliação de propriedades físicas e químicas de eletrodepósitos de Ni-W-P obtidos em célula de hull

Gecílio P. SilvaI,*; Andarair G. SantosI; Ricardo de S. CunhaI; Paulo S. G. SilvaII; José A. M. OliveiraI


The Hull cell is a trapezoidal structure in which the cathode forms an oblique angle with respect to the anode. The change in the angles of the electrodes changes the distances between them and gives rise to a gradient along the cathode.

http://dx.doi.org/10.5935/0100-4042.20150144

Publicado online: agosto 31, 2015
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Quim. Nova 2015, 38(10), 1260-1264

 

Síntese e determinação da estereoquímica relativa de um novo epóxido aldeído ciclopentano monoterpenóide

Reginaldo B. dos Santos*; Álvaro Cunha Neto; Elizeu de Souza M. Junior; Valdemar Lacerda Jr.; Sandro J. Greco; Júlia de Almeida Leite; Bruna B. de Faria; Igor Simões A. Felippe


A novel epoxy-carbaldehyde cyclopentane monoterpenoid with contiguous asymmetric centers, acting as a starting material for the synthesis of plinol, was synthesized from (R)-(+)-limonene oxide.

http://dx.doi.org/10.5935/0100-4042.20150151

Publicado online: setembro 30, 2015
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Quim. Nova 2015, 38(10), 1265-1272

 

Efeito do dioxido de carbono sobre a estabilidade da fase Ca2Fe2O5 aplicada no processo de degradação fotocatalitico do azul de metileno

Erandir Brasil da Silva; Antoninho Valentini*


Methylene blue degradation under N2 flow is higher than under air or CO2 flow. The Ca2Fe2O5 phase reacts with CO2 in an aqueous system. After the photocatalytic process, no Ca2Fe2O5 phase was observed in any system.

http://dx.doi.org/10.5935/0100-4042.20150159

Publicado online: outubro 26, 2015
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Quim. Nova 2015, 38(10), 1273-1281

 

Comparação de métodos por cromatografia líquida na determinação de multirresíduos de agrotóxicos em morangos

Daniele Oshita; Isabel C. S. F. Jardim*


This study compares chromatographic techniques for the determination of pesticide multiresidues in strawberries. The application of pesticides causes great concern owing to food safety and environmental protection issues, in addition to affecting the requirements for export licenses.

http://dx.doi.org/10.5935/0100-4042.20150145

Publicado online: setembro 15, 2015
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Quim. Nova 2015, 38(10), 1282-1288

 

Synthesis and antifungal activity of palmitic acid-based neoglycolipids related to papulacandin D

Thiago Belarmino de SouzaI; Ana Carolina Oliveira BretasI; Ricardo José AlvesI,*; Thais Furtado Ferreira MagalhãesII; Maria Aparecida Resende StoianoffII


This work describes the synthesis and anti-Candida activity of a series of new palmitic acid-based neoglycolipides related to fungicidal Papulacandin D.

http://dx.doi.org/10.5935/0100-4042.20150156

Publicado online: outubro 5, 2015
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Quim. Nova 2015, 38(10), 1289-1292

 

Constituents of essential oil and hydrolate of leaves of Campomanesia viatoris Landrum

Iara Lisboa de MatosI; Samísia Maria Fernandes MachadoI; Adauto Ribeiro de SouzaII; Emmanoel Vilaça CostaIII,IV; Angelita NepelV; Andersson BarisonV; Péricles Barreto AlvesI,*


Ketones were determined to be predominant in the essential oil and hydrolates of Campomanesia viatoris Landrum. Tasmonone was isolated and its structure was characterized by 1D and 2D Nuclear Magnetic Resonance (NMR) spectrometry and mass spectrometry (MS) analyse.

http://dx.doi.org/10.5935/0100-4042.20150158

Publicado online: outubro 20, 2015
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Quim. Nova 2015, 38(10), 1293-1296

 

Anion-binding and sensing properties of novel receptors based on N-(indol-3-ylglyoxylyl)benzylamine

Wei WeiI,*; Yong jun LvI; Shi jun ShaoII; Yong GuoII


Receptor 5 on an N-(indol-3-ylglyoxylyl)benzylamine hydrazine hydrate derivative can selectively distinguish F from AcO, H2PO4, and other anions by a favorable color change from colorless to yellow in DMSO-H2O binary solutions.

http://dx.doi.org/10.5935/0100-4042.20150157

Publicado online: outubro 5, 2015
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Quim. Nova 2015, 38(10), 1297-1299

 

Fe3+-selective enhanced fluorescence probe based on a rhodamine derivative

Yongjun Lv


A novel rhodamine-based compound 1 containing a quinoline group was reported as an "off-on" fluorescent probe for Fe3+. A novel analytical method based on Euclidean distance was utilized to investigate the fluorescence response of 1 to Fe3+.

http://dx.doi.org/10.5935/0100-4042.20150138

Publicado online: agosto 27, 2015
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Quim. Nova 2015, 38(10), 1300-1306

 

Comparação de processamentos matemáticos de dados voltamétricos: aplicação na determinação simultânea de fluoroquinolonas

Luiz H. de OliveiraI; Lauro A. Pradela FilhoII; André L. SantosII; Regina M. TakeuchiII; Magno A. G. TrindadeI,*


The deconvolution and second-order derivative of square wave voltammograms were used to achieve separation of the voltammetric peaks of levofloxacin (LEVO) and norfloxacin (NOR), for their simultaneous quantification in urine samples.

http://dx.doi.org/10.5935/0100-4042.20150162

Publicado online: outubro 26, 2015
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Quim. Nova 2015, 38(10), 1307-1312

 

Produção de biodiesel a partir de ácidos graxos provenientes do refino de óleos vegetais via catálise ácida heterogenea e micro-ondas

Michele C. Reis; Flavio A. Freitas; Elizabeth R. Lachter*; Rosane A. S. San Gil; Regina S. V. Nascimento; Rodrigo L. Poubel; Leandro B. Borré


A maximum production of ester was achieved from fatty acids obtained by refining coconut and soybean oils. Microwave irradiation reduced the reaction time from 6 to 1 hour.

http://dx.doi.org/10.5935/0100-4042.20150163

Publicado online: outubro 26, 2015
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Revisão Quim. Nova 2015, 38(10), 1313-1322

 

O estado da arte da ligação de hidrogênio

Boaz G. Oliveira*


Theoretical methods of electronic structure play a significant role in unveiling the hydrogen bond properties from structural data, vibration modes, or electronic profiles.

http://dx.doi.org/10.5935/0100-4042.20150146

Publicado online: setembro 15, 2015
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Nota Técnica Quim. Nova 2015, 38(10), 1339-1344

 

Desenvolvimento de uma técnica ultrassônica para avaliar teores de óleo e graxa em efluentes de biocombustíveis

Luciano Segné F. Silva; Douglas S. Bibiano; Monique Kort-Kamp Figueiredo; Rodrigo P. B. Costa-Félix


This figure discloses graphically the thresholds for detection (based on the probability of 0.95) and quantification (probability of 0.99) when using the proposed ultrasonic method for the analytical task of evaluating the content of oils and greases mixed in water.

http://dx.doi.org/10.5935/0100-4042.20150153

Publicado online: setembro 30, 2015
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Quim. Nova 2015, 38(10), 1345-1350

 

Atribuição da estereoquímica da α-santonina através das medidas do acoplamento dipolar residual

Rubens R. TelesI,II; José A. A. FrançaI,III; Armando Navarro-VázquezI; Fernando HallwassI,*


This report describes the application of anisotropic nuclear magnetic resonance parameters, including residual dipolar coupling (RDC), for the determination of the relative configuration of α-santonin. The RDCs were also successfully employed for the assignment of prochiral methylene at C5, which was not previously known.

http://dx.doi.org/10.5935/0100-4042.20150154

Publicado online: setembro 30, 2015
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Educação Quim. Nova 2015, 38(10), 1351-1356

 

Interactions: design, implementation and evaluation of a computational tool for teaching intermolecular forces in higher education

Francisco Geraldo BarbosaI; Jair MafezoliI; Mary Anne Sousa LimaI; Francisco Serra Oliveira AlexandreI,III; Diego Macedo de AlmeidaII; Antonio José Melo Leite JuniorII; José Nunes da Silva JúniorI,*


A free educational software was designed in English and Portuguese, implemented and evaluated by professors and students. It was characterized as an auxiliary tool to assist professors in their lectures and students in their learning process of intermolecular forces.

http://dx.doi.org/10.5935/0100-4042.20150147

Publicado online: setembro 15, 2015
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Quim. Nova 2015, 38(10), 1357-1365

 

Células solares sensibilizadas por corantes naturais: um experimento introdutório sobre energia renovável para alunos de graduação

Gabriela G. Sonai; Maurício A. Melo Jr.; Julia H. B. Nunes; Jackson D. Megiatto Jr.; Ana F. Nogueira*


Dye-sensitized solar cells were prepared by undergraduate students in a teaching laboratory as an approach to the concepts related to the development of an alternative renewable and environmentally friendly energy source.

http://dx.doi.org/10.5935/0100-4042.20150148

Publicado online: setembro 15, 2015
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Quim. Nova 2015, 38(10), 1366-1373

 

Preparação de pontos de carbono e sua caracterização óptica: um experimento para introduzir nanociência na graduação

Roberto Vaz; Kayo O. Vieira; Cláudia E. Machado; Jefferson L. Ferrari; Marco A. Schiavon*


In this study, carbon dots were obtained through pyrolysis under an inert atmosphere using commercial colorless gelatin as a low cost precursor. The optical properties of carbon dots such as ultraviolet-visible absorption and emission properties make them a promising material.

http://dx.doi.org/10.5935/0100-4042.20150150

Publicado online: setembro 15, 2015
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Assuntos Gerais Quim. Nova 2015, 38(10), 1374-1378

 

Woman in chemistry. Jane Marcet, a relevant figure in chemistry education

Johanna Camacho GonzalezI,*; Alvaro Muñoz-CastroII


A historiographical study of Jane Marcet's role in spreading chemistry knowledge to a wider audience in the 19th century is presented.

http://dx.doi.org/10.5935/0100-4042.20150143

Publicado online: agosto 31, 2015
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