A5038099296- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Carbon Dioxide Capture Technologies
- Metal-Organic Frameworks: Synthesis and Applications
- Membrane Separation and Gas Transport
- Crystallography and molecular interactions
- Supramolecular Chemistry and Complexes
- Magnetism in coordination complexes
- Catalysis and Hydrodesulfurization Studies
- Biodiesel Production and Applications
- Zeolite Catalysis and Synthesis
- Lanthanide and Transition Metal Complexes
- Covalent Organic Framework Applications
- Crystal structures of chemical compounds
- Luminescence and Fluorescent Materials
- Catalytic Processes in Materials Science
- Carbon dioxide utilization in catalysis
- Mesoporous Materials and Catalysis
- Nanoparticle-Based Drug Delivery
- Iron oxide chemistry and applications
- Ferroelectric and Piezoelectric Materials
- Clay minerals and soil interactions
- Nanoplatforms for cancer theranostics
- Dendrimers and Hyperbranched Polymers
- Molecular Junctions and Nanostructures
Universidade Federal Fluminense
2016-2025
Hong Kong Baptist University
2023
Royal Society of Chemistry
2023
École Polytechnique Fédérale de Lausanne
2023
University of Calgary
2023
Korea Advanced Institute of Science and Technology
2023
Indian Institute of Technology Kanpur
2023
University of British Columbia
2023
University of Bologna
2006-2023
University of Alberta
2023
Inspired by the concept of multivalency in living systems, two mechanically interlocked molecules have been conceived that incorporate not once or twice but thrice features a pH-switchable [2]rotaxane with orthogonal recognition sites for dibenzo[24]crown-8 (DB24C8), and 2,3-dinaphtho[24]crown-8 (DN24C8)-one dialkylammonium ion (CH(2)NH(2)(+)CH(2)) other bipyridinium dication (BIPY(2+)). Whereas at low pH, CH(2)NH(2)(+)CH(2) bind DB24C8/DN24C8 macrocycles preferentially, high deprotonation...
We review the recent advances in synthesis and utilization of heterogeneous basic catalysts for biodiesel production.
A set of amines with different basicities was anchored onto MCM-41 and CO<sub>2</sub> CH<sub>4</sub> adsorption capacities were investigated.
A metal-organic framework, Zn-[2-methylimidazolate] frameworks (ZIF-8), was used as adsorbent material to remove different concentrations of oxytetracycline (OTC) antibiotic in a fixed-bed column. The OTC studied at 10, 25 and 40 mg L-1. At L-1, the breakthrough point reached after approximately 10 minutes, while L-1 this about 30 minutes. highest removal rate 60% for concentration 200 adsorption capacity (28.3 g-1) attained OTC. After process, band shift observed UV-Vis spectrum eluate....
Abstract A deeper knowledge on the effects of degradation magnetic nanoparticles their properties is required to develop tools for identification and quantification in biological media by means. Citric acid phosphonoacetic acid-coated have been degraded a medium that mimics lysosomal conditions. Magnetic measurements transmission electron microscopy used follow up process. Particle size reduced significantly 24 h at pH 4.5 body temperature. These transformations affect compounds. reduction...
Polyaniline-decorated ZIF-8 nanoparticles (nPANI@nZIF-8) were easily synthesized and employed as a multifunctional system for the delivery of antitumor drug 5-fluorouracil (5-FU). Because storage ability network ZIF-8, 68% total amount 5-FU was released at pH 5.2. The exhibits absorption in near-infrared (NIR) region can be used photothermal therapy owing to presence nPANI, which has strong NIR uptake. This causes local hyperthermia by aiding diffusion molecules contained polymer into...
Two organic superbases, 1,5,7-triazabicyclo[4,4,0]dec-5-ene (TBD) and 1,1,3,3-tetramethylguanidine (TMG), were anchored onto silica-coated uncoated iron oxide nanoparticles, resulting in three recoverable basic nanocatalysts.
An efficient and recyclable heterogeneous acid catalyst based on sulfonic-reduced graphene oxide (rGO-SO3H) has been developed tested for transesterification reaction of soybean oil to produce biodiesel. By combining various techniques we show a high amount sulfonic groups (12.1 ± 0.71 mmol g−1) were chemically bounded onto the surface reduced sheets. The rGO-SO3H shows biodiesel production (99% yield) was used in five consecutive reactions without losing its activity. excellent performance...
CO2 emissions into the atmosphere have been rapidly rising due to human activities, resulting in escalation of global warming. To mitigate climate change, it is imperative develop materials for capture with high capacity and low production costs. Herein, we developed a facile method obtain adsorbents based on reduced graphene oxide (rGO) sheets, NrGO(1 - X)700, where X represents mass diethylenetriamine (DETA) (X = 1, 2 4 g) used preparation. The 1)700, NrGO (1 2)700, 4)700 were obtained...
Arboviruses, including Zika (ZIKV) and Chikungunya virus (CHIKV), replicate in both arthropods vertebrates are transmitted through mosquito, tick, sandfly bites. The development of specific antiviral drugs vaccines for these viruses is limited, highlighting the importance investigating potential drug candidates. In this study, we examined effects hydroxy-triazole-based compounds on vitro replication ZIKV CHIKV. Hydroxy-1,2,3-triazoles were synthesized from 4-acyl-1,2,3-triazoles, previously...
Two dendrimers were designed and synthesized that contain a 1,3,5-trisubstituted benzenoid core incorporate 9 21 viologen (4,4'-bipyridinium) units in their branches addition to hydrophilic (aryloxy) terminal groups. For comparison purposes, model compounds containing one two also studied. These polycationic form strong host-guest complexes with the dianionic of red dye eosin dilute CH(2)Cl(2) solutions. Titration experiments, based on fluorescence measurements, showed each unit dendritic...
The interaction between CO2 and 1,2-diaminoethane was computed using pure hybrid density functionals. CAM-B3LYP wB97X-D functionals a triple-ζ basis set that includes diffuse polarization functions are the best for calculating relative energies of zwitterion intermediate compared to coupled-cluster with single, double non-iterative triple excitation (CCSD(T)) approach extrapolated complete limit. With two set, is 1.70 kcal mol(-1) less stable than reactants, close 1.63 CCSD(T) approach....
An alternating magnetic field (AMF)-responsive controlled release system has been developed by the binding of mono-6-deoxy-6-(p-tolylsulfonyl)-β-cyclodextrin (βCD-Ts) onto amine-modified superparamagnetic iron oxide nanoparticles (MNP-NH<sub>2</sub>), resulting in a MNP-βCD nanocarrier.
Abstract Dibenzyl‐4,4′‐bipyridinium ( BIPY 2+ ) bis(hexafluorophosphate) and three of its derivatives – disubstituted at the para positions benzyl groups with CO 2 Me, F, Me in turn have been shown to form 1:1 complexes that are [2]pseudorotaxanes dibenzo[24]crown‐8 DB24C8 ), benzometaphenylene[25]crown‐8 BMP25C8 dipyrido[24]crown‐8 DP24C8 CD 3 CN solution by 1 H NMR spectroscopy one case solid state X‐ray crystallography. Binding constants K a for all these complexes, which were determined...
The fabrication and efficient operation of a redox-driven hybrid nanoreservoir that contains the host–guest pair β-cyclodextrin (β-CD) ferrocenyl (–Fc) group attached to MCM-41 nanoparticles loaded with rhodamine B are reported. process is based on effects pH related acid catalyzed oxidation by molecular oxygen (O2). By thorough set experiments, combined exploited control releasing process. Such experiments characterize at various points along pathway, show level achieved over release B....