JBCS

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vol. 33, No. 5, 2022, p. 413-507

 

Unraveling the photophysical properties of polypyridyl ReI complexes with close-lying excited states by temperature-dependent luminescence measurements coupled with quantum-mechanical calculations. Details are presented in the Article Temperature Dependent Emission Properties of ReI Tricarbonyl Complexes with Dipyrido-Quinoxaline and Phenazine Ligands by Cristiane L. Ramos, Fernando S. Prado, Marcos Eduardo G. Carmo, Giliandro Farias, Bernardo Souza, Antonio Eduardo H. Machado and Antonio Otavio T. Patrocinio on page 425.


Cover Article
J. Braz. Chem. Soc. 2022, 33(5), 425-436

Temperature Dependent Emission Properties of ReI Tricarbonyl Complexes with Dipyrido-Quinoxaline and Phenazine Ligands

Cristiane L. Ramos; Fernando S. Prado; Marcos Eduardo G. Carmo; Giliandro Farias; Bernardo Souza;
Antonio Eduardo H. Machado ; Antonio Otavio T. Patrocinio

How to cite this article

Unraveling the photophysical properties of polypyridyl ReI complexes with close-lying excited states by temperature-dependent luminescence measurements coupled with quantum-mechanical calculations. Details are presented in the Article Temperature Dependent Emission Properties of ReI Tricarbonyl Complexes with Dipyrido-Quinoxaline and Phenazine Ligands by Cristiane L. Ramos, Fernando S. Prado, Marcos Eduardo G. Carmo, Giliandro Farias, Bernardo Souza, Antonio Eduardo H. Machado and Antonio Otavio T. Patrocinio on page 425.

https://dx.doi.org/10.21577/0103-5053.20210161

Published online: November 30, 2021
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Articles J. Braz. Chem. Soc. 2022, 33(5), 413-424

Determination of 3,4,5-Trihydroxybenzoic Acid Exploiting a Visible-Light-Driven Photoelectrochemical Platform: Application in Wine and Tea Samples

Kayni C. M. S. Lima; Ridvan N. Fernandes; Clenilton C. dos Santos; Flavio S. Damos ; Rita de Cássia S. Luz

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Photoelectrochemical (PEC) determination of 3,4,5-trihydroxybenzoic (THBA) with the p-DG-CdS/fluorine-doped tin oxide (FTO) sensor.

https://dx.doi.org/10.21577/0103-5053.20210160

Published online: November 25, 2021

 

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J. Braz. Chem. Soc. 2022, 33(5), 425-436

Temperature Dependent Emission Properties of ReI Tricarbonyl Complexes with Dipyrido-Quinoxaline and Phenazine Ligands

Cristiane L. Ramos; Fernando S. Prado; Marcos Eduardo G. Carmo; Giliandro Farias; Bernardo Souza;
Antonio Eduardo H. Machado ; Antonio Otavio T. Patrocinio

How to cite this article

 

New insights on the photophysical properties of rhenium(I) tricarbonyl complexes are reported based on a joint theoretical-experimental work.

https://dx.doi.org/10.21577/0103-5053.20210161

Published online: November 30, 2021

 

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J. Braz. Chem. Soc. 2022, 33(5), 437-445

Use of a Portable Microscope Combined with a Smartphone to Determine the Authenticity of Brazilian Banknotes and National Driver's Licenses

Rayana A. Costa; Bruno V. Vittorazzi; Amanda P. Barbosa; Victória B. da Rocha; Jandira M. O. B. Brandão; Valdemar Lacerda Jr. ; Paulo R. Filgueiras ; Wanderson Romão

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Smartphone microscope associated with chemometric methods used to evaluate the authenticity of a document.

https://dx.doi.org/10.21577/0103-5053.20210162

Published online: November 30, 2021

 

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Total access: 877


J. Braz. Chem. Soc. 2022, 33(5), 446-455

In vitro Antioxidant and Anticholinesterase Activities of Ouratea fieldingiana (Gardner) Eng. Leaf Extract and Correlation with Its Phenolics Profile with an in silico Study in Relation to Alzheimer's Disease

Lucas S. Frota; Daniela R. Alves ; Leonardo S. Freitas; Francisco F. S. Lopes; Marcia M. Marinho; Emmanuel S. Marinho ; Selene M. de Morais

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Ouratea fieldingiana flavonoids present antioxidant and anticholinesterase activities and in silico studies showed that some of them bind probably to acetylcholinesterase (AChE) allosteric centers. All compounds can be considered promising agents to fight Alzheimer's disease.

https://dx.doi.org/10.21577/0103-5053.20210163

Published online: November 30, 2021

 

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J. Braz. Chem. Soc. 2022, 33(5), 456-465

Thermophysical and Transport Properties of the BaCl2-CsCl High Temperature Ionic Liquid Mixtures

Ana-Maria Popescu ; Virgil Constantin

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Density and viscosity vs. temperature in high temperature ionic liquids (HTILs) mixtures BaCl2-CsCl.

https://dx.doi.org/10.21577/0103-5053.20210164

Published online: December 6, 2021

 

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Total access: 751


J. Braz. Chem. Soc. 2022, 33(5), 466-473

Novel Greener Microwave-Assisted Deprotection Methodology for the 1,3-Dioxolane Ketal of Isatin Using Calix[n]arenes

Lucas B. Barbosa; Tiago L. da Silva; Michelle J. C. Rezende; Bianca N. M. da Silva; Rodrigo N. Guzzo; Bárbara V. Silva

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The use of p-sulfonic acid-calix[4]arene (SCX4), microwave energy, and water as a solvent is a fast, efficient and reusable catalytic system for the hydrolysis of the isatin ketal dioxolane.

https://dx.doi.org/10.21577/0103-5053.20210165

Published online: December 7, 2021

 

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Total access: 863


J. Braz. Chem. Soc. 2022, 33(5), 474-482

Validation and Application of a Methodology for Quantifying Levels of Parabens in Sports Supplements from Brazil Using Liquid Chromatography-Mass Spectrometry

Bruno A. Rocha ; Cibele A. Cesila; Airton C. Martins ; Marília C. O. Souza ; Fernando Barbosa Jr.

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Prohibited parabens were found in sports supplements from Brazil.

https://dx.doi.org/10.21577/0103-5053.20210166

Published online: December 9, 2021

 

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J. Braz. Chem. Soc. 2022, 33(5), 483-490

Natural and Semisynthetic Triterpenes from Combretum leprosum Mart. with Antiplasmodial Activity

Guilherme M. Passarini ; Amália S. Ferreira ; Leandro S. Moreira-Dill ; Fernando B. Zanchi; Aurileya G. de Jesus ; Valdir A. Facundo; Carolina B. G. Teles

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Six triterpenes were evaluated for their in vitro activity and their in silico binding affinity to PfENR (Plasmodium falciparum 2-trans-enoyl-reductase). They were also investigated with respect to their hemolytic and cytotoxic activities.

https://dx.doi.org/10.21577/0103-5053.20210167

Published online: December 10, 2021

 

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Total access: 771


J. Braz. Chem. Soc. 2022, 33(5), 491-497

Catalytic Effects of Ruthenocene Bimetallic Compounds Derived from Fused Aromatic Ring Ligands on the Main Oxidizing Agent for Solid Rocket Motor

Yuvaraja Dibdalli; José Gaete; Claudio Osorio-Gutierrez; Juan Luis Arroyo; Angel Norambuena; Mungalimane K. Amshumali; Gabriel Abarca ; Cesar Morales-Verdejo

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Ruthenocene bimetallic compounds as burning rate catalysts for composite solid propellants.

https://dx.doi.org/10.21577/0103-5053.20210168

Published online: December 13, 2021

 

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Total access: 1141


J. Braz. Chem. Soc. 2022, 33(5), 498-507

Development of a Disposable Pipette Extraction Method Using Coffee Silverskin as an Adsorbent for Chromium Determination in Wastewater Samples by Solid Phase Extraction

Weida R. Silva ; Bruno E. S. Costa ; Alex D. Batista ; Vanessa N. Alves ; Nivia M. M. Coelho

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Coffee silverskin obtained from industrial waste was successfully used as a new adsorbent to solid phase extraction in a disposable pipette tips (DPX) method. The procedure was capable of determining chromium at low concentrations in sample wastewater according to CONAMA established standards.

https://dx.doi.org/10.21577/0103-5053.20210171

Published online: December 17, 2021

 

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Total access: 903

Online version ISSN 1678-4790 Printed version ISSN 0103-5053
Journal of the Brazilian Chemical Society
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