A5032697168- Electron Spin Resonance Studies
- Magnetism in coordination complexes
- Supramolecular Chemistry and Complexes
- Lanthanide and Transition Metal Complexes
- Radical Photochemical Reactions
- Oxidative Organic Chemistry Reactions
- Free Radicals and Antioxidants
- Molecular Junctions and Nanostructures
- Advanced NMR Techniques and Applications
- Photochemistry and Electron Transfer Studies
- Molecular Sensors and Ion Detection
- Gold and Silver Nanoparticles Synthesis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Nanocluster Synthesis and Applications
- Metal complexes synthesis and properties
- Catalysis and Oxidation Reactions
- Electrochemical Analysis and Applications
- Chemical Reaction Mechanisms
- Catalytic C–H Functionalization Methods
- Chemical Synthesis and Reactions
- Supramolecular Self-Assembly in Materials
- Antioxidant Activity and Oxidative Stress
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Organic Chemistry Cycloaddition Reactions
- DNA and Nucleic Acid Chemistry
University of Bologna
2015-2025
Deleted Institution
2019
Ospedale San Giacomo Apostolo
2018
University of Palermo
2014
University of Trieste
2004-2008
University of Groningen
2008
University College London
2000-2001
Electronic cigarettes (e-cigs) are devices designed to deliver nicotine in a vaping solution rather than smoke and without tobacco combustion. Perceived as safer alternative conventional cigarettes, e-cigs aggressively marketed lifestyle-choice consumables, thanks few restrictions lack of regulatory guidelines. E-cigs have also gained popularity among never-smokers teenagers, becoming an emergent public health issue. Despite the burgeoning worldwide consumption e-cigs, their safety remains...
Is two-photon catalysis better than one-photon? The sequential absorption of two photons enables the production highly reducing or oxidizing species. short lifetime excited states and photostability photocatalyst pose significant limitations to this approach.
The preparation and the properties of gold nanoparticles (Au NPs) protected by perfluorinated amphiphiles are described. thiols were devised to form a region close surface have hydrophilic portion in contact with bulk solvent impart solubility water. monolayer clusters prepared, an homogeneous phase using sodium thiolates because low nucleophilicity alpha-perfluorinated thiols, fully characterized 1H, 19F NMR spectrometry, IR UV−vis absorption spectroscopies, transmission electron microscopy...
Although the Food and Drug Administration has authorized marketing of “heat-not-burn” (HnB) electronic cigarettes as a modified risk tobacco product (MRTP), toxicological effects HnB smoke exposure on brain are still unexplored. Here, paramagnetic resonance prefrontal cortex (PFC) HnB-exposed rats shows dramatic increase in reactive radical species (RRS) yield coupled with an inflammatory response mediated by NF-κB-target genes including TNF-α, IL-1β, IL-6 downregulation peroxisome...
Halophyte species represent valuable reservoirs of natural antioxidants, and, among these, Salicornia europaea stands out as a promising edible plant. In this study, young and old S. leaves were compared for the content bioactive compounds antioxidant activity to assess changes in different growth phases; then, potential protective effects against low-dose CCl4-induced toxicant-associated fatty liver disease (TAFLD) investigated by administering an aqueous suspension rats daily two weeks....
Abstract Water remediation with biomass derivatives has attracted attention for its sustainable impact on the earth. Chemical procedures new adsorbent and active biomaterials must be implemented to remove organic pollutants more efficiently. Herein, we obtained a sustainable, environmentally, low‐cost biochar from bamboo Dendrocalamus giganteus (BBC, B400) by thermal treatment at 400 °C without physical chemical pre‐ post‐treatments. By electron paramagnetic resonance (EPR), determined...
The rate constants for the reaction of primary alkyl radicals with substituted phenolic compounds have been measured in benzene or toluene at room temperature by using radical clock technique. With three representative phenols, containing ortho positions substituents different size, kinetics hydrogen transfer to was studied temperatures obtain corresponding Arrhenius parameters. kinetic solvent effect on α-tocopherol also investigated six solvents behaving as bond acceptors, while...
ESR spectroscopy has been used to study the interaction of para-pentylbenzyl hydroxyalkyl nitroxide with monolayer water-soluble protected gold clusters having a core diameter ranging from 1.6 5.3 nm. The solubilization probe in more hydrophobic environment strongly depends on size core. In particular, partition equilibrium constant increases as nanoparticle decreases. These results have attributed different packing chains resulting radius curvature investigated nanoparticles. This...
Beyond stripes: The extreme lipophobicity of perfluorinated chains attached to amphiphilic thiolates triggers the formation "stars" (or patches) surrounded by alkylthiolates in three-dimensional self-assembled monolayers. This strategy led first example a water-soluble multicompartment monolayer wrapped around gold core.
We present here the results of a CW-ESR investigation double spin labeled α-cyclodextrin-based [2]rotaxane that is characterized by presence nitroxide labels both at wheel and dumbbell. This was accomplished synthesizing α-CD (the wheel) mechanically blocked on thread containing unit Cu(I) catalyzed azide-alkyne cycloaddition (CuAAC). Both ESI-MS analysis NMR spectroscopy were used to provide evidence threading processes. Because unsymmetrical structure axle, two different geometrical...
Bond dissociation energies (BDEs) of O-H bond in the hydroxylamines deriving from neutral and deprotonated forms 4-carboxy-TEMPO have been measured solution (acetonitrile dimethylsulfoxide) by using EPR radical equilibration technique. The experimental results confirm that stabilizing interaction between a remote negative charge stable radicals, occurring gas phase, is completely lost polar solvents as predicted theoretical computations.
EPR spectroscopy has been used to study the interaction of para-substituted benzyl hydroxyalkyl nitroxides with monolayer water-soluble protected gold cluster made by a short alkyl chain and triethylene glycol monomethyl ether unit. The inclusion nitroxide probes in more hydrophobic environment gave rise reduction value both nitrogen β-proton hyperfine splittings. spectra also showed selective line broadening attributed modulation spectroscopic parameters as result exchange between free...
4,4'-(4,4'-Isopropylidenediphenoxy)bis(N-hydroxyphthalimide), which is a new lipophilic analogue of N-hydroxyphthalimide, can act as an effective catalyst in the aerobic oxidation alkylaromatics under reduced amounts polar cosolvent. The was selected on basis in-depth study influence that substituents aromatic ring N-hydroxyphthalimide exert determining NO-H bond dissociation energy (BDE). BDE values for range model molecules are calculated by DFT and measured EPR spectroscopy. be...
Self-assembled monolayers composed of a mixture thiolate molecules, featuring hydrocarbon or perfluorocarbon chains (H- and F-chains) terminating with short poly(oxoethylene) (PEG) moiety, are the most extreme example surfactant immiscibility on gold nanoparticles reported so far. The phase segregation between H-chains F-chains consequent, peculiar folding PEG responsible for increased affinity selected radical probe fluorinated region, which increases as size domains decrease, independently...
Gold nanoparticles coated with fluorinated ligands (F-MPCs) present features suitable for (19)F MRI as observed from phantom experiments. Cellular uptake, by HeLa cells, and toxicity of fluorescent dye-decorated F-MPCs are presented together their ability to bind hydrophobic molecules allowing a potential combination targeting, delivery imaging features.
Lysozyme is used as a host molecule to disperse monomolecularly C<sub>60</sub> in water preserving the properties.
Developing effective strategies to increase the chemical stability and fine-tune physico-chemical properties of melanin biopolymers by rational control π-electron conjugation is an important goal in materials science for biomedical technological applications. Herein we report that poly-1,8-dihydroxynaphthalene (pDHN), a non-nitrogenous, catechol-free fungal mimic, displays high degree structural integrity (from MALDI-MS CP/MAS 13 C NMR analysis), strong radical scavenging capacity (DPPH FRAP...
Abstract A large number of basic researches and observational studies suggested the cancer preventive activity vitamin E, but large-scale human intervention trials have yielded disappointing results actually showed a higher incidence prostate although mechanisms underlying increased risk remain largely unknown. Here we show through in vitro vivo that E produces marked inductive effect on carcinogen-bioactivating enzymes pro-oxidant status promoting both DNA damage cell transformation...
The back and forth motions of a crown-ether based wheel along the axis bistable rotaxane are triggered by decarboxylation 2-cyano-2-phenylpropanoic acid detected oscillation EPR nitrogen splitting dialkyl nitroxide function mounted within macrocyclic ring. When p-Cl derivative is used, accelerated. Conversely, with p-CH3 p-OCH3 derivatives, motion strongly inhibited insurgence collateral radical reactions.
Recently, the Food and Drug Administration authorized marketing of IQOS Tobacco Heating System as a Modified Risk Product based on an electronic heat-not-burn technology that purports to reduce risk.
Abstract Recently, in a communication to this journal, Qiao, Jang, and coworkers described an asymmetric photoredox reaction promoted by TADF cyanoarene photocatalysts (specifically 4DPAPN (3,4,5,6‐tetrakis(diphenylamino)phthalonitrile)). The authors claimed that the high reduction potential required for acetonitrile was achieved radical anion of photocatalyst its excited state, which initiated reaction. This mechanism is usually named consecutive photoinduced electron transfer (ConPeT), two...
This study reports the effects of protonation and Fe(II) complexation on exchange coupling magnetic properties a [2]‐rotaxane its corresponding free‐axle biradicals. The rotaxane features nitronyl‐nitroxide units as bulky stopper groups, triazole‐pyridine‐triazole ligand axle component, bipyridine moiety within macrocyclic ring. Our findings, obtained by Electron Paramagnetic Resonance spectroscopy in solution magnetometry solid state, demonstrate that rotaxanation induce profound changes...