A5040568690- Electrochemical Analysis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Metal complexes synthesis and properties
- Nanoparticle-Based Drug Delivery
- Dental Research and COVID-19
- Nanocluster Synthesis and Applications
- Electrochemical sensors and biosensors
- Conducting polymers and applications
- Advanced Photocatalysis Techniques
- Nanoparticles: synthesis and applications
- Inorganic and Organometallic Chemistry
- Electrocatalysts for Energy Conversion
- COVID-19 Clinical Research Studies
- Polyoxometalates: Synthesis and Applications
- Nanomaterials for catalytic reactions
- TiO2 Photocatalysis and Solar Cells
- Molecular Sensors and Ion Detection
- Advancements in Battery Materials
- Iron oxide chemistry and applications
- Porphyrin and Phthalocyanine Chemistry
- Adsorption and biosorption for pollutant removal
- Advanced battery technologies research
- Mass Spectrometry Techniques and Applications
- Advanced Nanomaterials in Catalysis
- Dental materials and restorations
Universidade de São Paulo
2015-2024
Instituto Butantan
2016-2024
Hospital Universitário da Universidade de São Paulo
2020-2024
Centro Universitário FEI
2019
Universidade Cidade de São Paulo
2012-2018
Universidade Estadual de Campinas (UNICAMP)
2004
University of Genoa
1996
University Library in Bratislava
1988
In gold nanoparticles the surface metal atoms play a major role, determining their chemical and physical properties by interacting with donor-acceptor species or ligands in similar way as related complexes. addition, coherent oscillations of electrons resonance frequency exciting light give rise to localized plasmons responsible for an enhancement local electric field SERS effect, allowing wide range applications chemistry, biology nanotechnology. Multifunctional bridging can be employed...
The risk of contamination and dissemination by SARS-CoV-2 has a strong link with nasal, oral pharyngeal cavities. Recently, our research group observed the promising performance an anionic phthalocyanine derivative (APD) used in mouthwash protocol without photoexcitation; this improved general clinical condition patients infected SARS-CoV-2. present two-arm study evaluated vitro antiviral activity cytotoxicity APD. Additionally, triple-blind randomized controlled trial was conducted 41...
Improving the charge capacity, electrochemical reversibility and stability of anode materials are main challenges for development Ni-based rechargeable batteries devices. The combination cobalt, as additive, electrode material nanostructuration revealed a very promising approach this purpose. new α-NiCo mixed hydroxide based electrodes exhibited high specific charge/discharge capacity (355–714 C g−1) outstanding structural stability, withstanding up to 700 redox cycles without any...
Aim: This case series demonstrated that phthalocyanine derivate mouthwash is a promising alternative for reducing the viral load of SARS-CoV-2 and clinical improvement infected patients who presented mild moderate symptoms. Purpose: The aim this study was to report diagnosed with COVID-19 used reduce Patients Methods: Eight 5mL gargling/rinsing one minute, five times daily, over fourteen day period. Two measurement scales were applied each patient in different periods verify sore throat –...
Keywords: cationic USPIOs, MRI, contrast agent, magnetic targeting, in vivo toxicity, intravital microscopy
A newly designed biocatalyst prepared by conjugation of lipase on SPION demonstrated high efficiency for biodiesel production. The nanomaterial was characterized FTIR, TGA and XRD, its enzymatic activity compared with a commercial standard.
Abstract Absorption and fluorescence spectroscopy, electrochemical techniques, semiempirical calculations were employed to characterize the multiple complexation equilibria between two polymethine cyanine dyes (IR‐786 Indocyanine green‐ICG, S) β ‐cyclodextrin ( ‐CD, L), as well chemical reactivity of complexed uncomplexed species against oxidizing agents hypochlorite (HC) hydrogen peroxide (HP). IR‐786 dimerization is favored with increase in ‐CD concentration form (SL) 2 complexes. In case...
The presence of anatase and rutile domains on nanocrystalline films P25 TiO2, as well the distinct coordination modes carboxylates those phases, were revealed by confocal Raman microscopy, a technique that showed to be suitable for imaging chemical morphology down submicrometric size.
We synthesized a novel series of compounds based on ruthenium(II) dicarboxybipyridine (dcbpy) complex containing chloro and trans-1,4-bis[2-(4-pyridyl)ethenyl]benzene (BPEB) ligands. The binuclear species Na6[{[RuII(dcbpy)2Cl}2(BPEB)] exhibits an electrochromic effect when reduced, which is assigned to the radical BPEB0/˙, similarly as in viologen-based compounds. carboxylate groups 4,4′ positions bipyridine allow strong attachment TiO2 surface, contributing efficient reversible electron...
Two novel ruthenium polypyridine complexes, [Ru(bpy)2Cl(BPEB)](PF6) and {[Ru(bpy)2Cl]2(BPEB)}(PF6)2 (BPEB = trans-1,4-bis[2-(4-pyridyl)ethenyl]benzene), were synthesized their characterization carried out by means of elemental analysis, UV−visible spectroscopy, positive ion electrospray (ESI-MS), tandem mass (ESI-MS/MS) spectrometry, as well NMR spectroscopy cyclic voltammetry. Cyclic differential pulse voltammetry for the mononuclear complex showed three set waves around 1.2 V (Ru2+/3+),...
The photochemical cis–trans isomerization of the 4-{4-[2-(pyridin-4-yl)ethenyl]phenyl}-2,2′:6′,2′′-terpyridine ligand (vpytpy) was investigated by UV-vis, NMR and TWIM-MS. Ion mobility mass spectrometry performed pursuing quantification isomeric composition during photolysis, however an in-source trans-to-cis process observed. In order to overcome this inherent phenomenon, vpytpy species suppressed complexation, reacting with iron(II) ions, forming [Fe(vpytpy)2]2+ complex. strategy...
The catalytic oxidation of water by the binuclear complex [Ru 2 (H O) (bpy) (tpy ph)](PF 6 ) 4 [bpy = 2,2′‐bipyridine; tpy ph 1,3‐bis(4′‐2,2′:6′,2′′‐terpyridin‐4‐yl)benzene] was investigated comparatively to its mononuclear counterpart [Ru(H O)(bpy)(phtpy)](PF (phtpy 4′‐phenyl‐2,2′:6′,2′′‐terpyridine). These catalysts were prepared from synthesis their precursor chloride complexes, which also extensively characterized in this work. H O–Ru II complexes found undergo proton‐coupled...
Abstract 2‐Pyrazin‐2‐ylethanethiol (PZT) interacts with gold nanoparticles (AuNps) and pentacyanidoferrates, providing a suitable bridging ligand for the exploitation of coordination chemistry involved in stabilization colloidal solutions controlled formation aggregates presence dimethyl sulfoxide. The electronic vibrational spectra molecules have been investigated discussed based on DFT ZINDO/S theoretical calculations. PZT‐modified AuNps exhibit strong SERS, coherent electromagnetic...