A5087406724- Nonlinear Optical Materials Research
- Crystallography and molecular interactions
- Solid-state spectroscopy and crystallography
- Metal complexes synthesis and properties
- Catalytic Processes in Materials Science
- Crystal Structures and Properties
- Crystallization and Solubility Studies
- Catalysis and Oxidation Reactions
- Mesoporous Materials and Catalysis
- Luminescence Properties of Advanced Materials
- Crystal structures of chemical compounds
- Spectroscopy and Chemometric Analyses
- Catalysis and Hydrodesulfurization Studies
- Magnetism in coordination complexes
- X-ray Diffraction in Crystallography
- Thermal and Kinetic Analysis
- Catalysis for Biomass Conversion
- Chemical Thermodynamics and Molecular Structure
- Lanthanide and Transition Metal Complexes
- Thermal Expansion and Ionic Conductivity
- Molecular spectroscopy and chirality
- Food Chemistry and Fat Analysis
- Free Radicals and Antioxidants
- Zeolite Catalysis and Synthesis
- Science and Education Research
Universidade Federal do Maranhão
2019-2025
Universidade Federal do Pará
2013-2025
Universidade Federal do Sul e Sudeste do Pará
2014-2018
Amazon Research Foundation
2018
Universidade Federal do Ceará
2009-2017
Rifampicin (RIF) is an antibiotic used to treat tuberculosis and leprosy. Even though RIF a market-available drug, it has low aqueous solubility, hindering its bioavailability. Among the strategies for bioavailability improvement of poorly soluble drugs, coamorphous systems have been revealed as alternative in increase solubility drug at same time also increasing amorphous state stability dissolution rate when compared with neat drug. In this work, new form from tromethamine (TRIS) was...
Here we report the crystallization of tris(nitrate-O,O')-bis(1,10-phenanthroline-N,N')-neodymium(III) complex by slow solvent evaporation method. Structural, electronic, thermal, and vibrational properties have been explored discussed. Additionally, all modes were carefully assigned, geometric parameters chemical reactivity indices obtained from results density functional theory (DFT) calculations including solvation effects in dimethylformamide water, as well vacuum. Moreover, a...
The discovery of new antibiotics is a major challenge these days, as the emergence resistant bacterial strains has intensified in recent years and responsiveness traditional drugs been impaired, mainly due to their early use. As way overcome this current problem, studies discover have among them are inorganic compounds. objective work was evaluate direct antibacterial activity combined with ampicillin, ciprofloxacin gentamicin molybdic acid potassium molybdate. Both compounds were chemically...
Abstract In this study, X‐ray diffraction confirms the crystallization of aqua(1,10‐phenanthroline)(L‐serinato)copper(II) nitrate in triclinic system (P‐1). Density functional theory calculations are used to assign vibration bands Cu 2+ ion and phenanthroline (phen) L‐serine (L‐ser) ligands obtained by Raman Fourier‐transform infrared spectroscopy. Physical analytical properties, evaluated computational study utilizing CrystalExplorer software, show prevalence H···O/O···H interaction....
Abstract Temperature–dependent Raman studies of disodium dimolybdate (Na 2 Mo O 7 ) crystal are reported. Lattice dynamical calculation was used to predict both wavenumbers and atomic displacements (eigenvectors) for the vibrational modes. These calculations were based on classical rigid‐ion model. The high‐temperature scattering study showed that it remains in orthorhombic structure 8–848 K range undergoes a structural phase transition between 848 854 K. This is most likely connected with...
Abstract Temperature‐dependent Raman studies on Na 2 WO 4 and MoO crystals were performed in order to obtain information structural changes induced by temperature evolution. The stability of the cubic phase was assessed our results indicate that this is stable 8–823 K 15–773 ranges for , respectively. crystal shows a transition occurring at 833 K. undergoes sequence three transitions, which observed 783–803, 823–913 943–950 In both crystals, strong first‐order occurs as indicated behavior...
In this work, the polymorphism of octadecanoic acid (C<sub>18</sub>H<sub>36</sub>O<sub>2</sub>, stearic acid) was studied as a function organic solvent polarity.