A5035793665- Cultural Heritage Materials Analysis
- Conservation Techniques and Studies
- Building materials and conservation
- Metal complexes synthesis and properties
- Nanocluster Synthesis and Applications
- X-ray Diffraction in Crystallography
- Electron Spin Resonance Studies
- Crystallization and Solubility Studies
- Advanced Nanomaterials in Catalysis
- Photochemistry and Electron Transfer Studies
- Radiation Effects and Dosimetry
- Fullerene Chemistry and Applications
- Nuclear Physics and Applications
- Mineralogy and Gemology Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Synthesis and biological activity
- Glass properties and applications
- Synthesis and Properties of Aromatic Compounds
- Occupational and environmental lung diseases
- Iron oxide chemistry and applications
- Synthesis and Characterization of Heterocyclic Compounds
- Corrosion Behavior and Inhibition
- ATP Synthase and ATPases Research
- Metalloenzymes and iron-sulfur proteins
- Wood Treatment and Properties
University of Padua
2015-2025
University of Florence
2020
Bibliothèque Nationale de France
2020
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2010
Laboratoire de Spectroscopie pour les Interactions, la Réactivité et l'Environnement
2008
Centre National de la Recherche Scientifique
2008
Babeș-Bolyai University
2008
University of Udine
2004-2007
National Interuniversity Consortium of Materials Science and Technology
2006
National High Magnetic Field Laboratory
2000-2004
Au25(SR)18 has provided fundamental insights into the properties of clusters protected by monolayers thiolated ligands (SR). Because its ultrasmall core, 1 nm, displays molecular behavior. We prepared a Au25 cluster capped n-butanethiolates (SBu), obtained structure single-crystal X-ray crystallography, and studied both experimentally theoretically. Whereas in solution Au25(SBu)18(0) is paramagnetic molecule, crystal it becomes linear polymer connected via single Au-Au bonds stabilized...
X-ray crystallography has been fundamental in discovering fine structural features of ultrasmall gold clusters capped by thiolated ligands. For still unknown structures, however, new tools capable providing relevant information are sought. We prepared a 25-gold atom nanocluster protected the smallest ligand ever used, ethanethiol. This cluster displays electrochemistry, mass spectrometry, and UV-vis absorption spectroscopy similar Au25 18 The anionic neutral form Au25(SEt)18 were fully...
Several research groups have observed magnetism in monolayer-protected gold cluster samples, but the results were often contradictory, and thus, a clear understanding of this phenomenon is still missing. We used Au25(SCH2CH2Ph)180, which paramagnetic that can be prepared with atomic precision whose structure known precisely. Previous magnetometry studies only detected paramagnetism. samples representing range crystallographic orders studied their magnetic behaviors using electron resonance...
Iron-gall inks (IGIs) are some of the most used writing materials in ancient times. Several efforts have been devoted to identification and characterization this type ink manuscripts, with a particular focus on their degradation patterns. However, due complexity, in-depth IGIs poses challenges related variability. Within research, main elements variability associated chemical structure systematically investigated. The study involved preparation iron complexes gallic acid, tannic polyphenols...
XANES and UV-vis-NIR have been applied compared for the determination Fe<sup>2+</sup> in ancient glass.
Singlet oxygen,
We prepared four structurally related paramagnetic Au<sub>25</sub>(SR)018 clusters.<sup>1</sup>H ENDOR and NMR signals could be successfully to the types of ligand distance protons from central gold core. It is shown that unpaired electron can used as a very precise probe structure interface between metal core capping ligands.
Three new 6-methyl-2-oxo-1,2-dihydroquinoline-3-carbaldehyde-thiosemicarbazones-N-4-substituted pro-ligands and their Cu(II) complexes (1, -NH2; 2, -NHMe; 3, -NHEt) have been prepared characterized. In both the X-ray structures of 1 two crystallographically independent complex molecules were found that differ either in nature weakly metal-binding species (water 1a nitrate 1b) or co-ligand 3a methanol 3b). Electron Paramagnetic Resonance (EPR) measurements carried out on 3 confirmed presence...
Three new coordination complexes of Cu(II) ions made from two hydrazone ligands, 7-chloro-2-oxo-1,2-dihydroquinoline-3-carbaldehyde-2-furoyl-hydrazone (HL1) and 6-chloro-2-oxo-1,2-dihydroquinoline-3-carbaldehyde-2-furoyl-hydrazone (HL2) have been synthesized fully characterized by spectroscopic techniques. Their crystal molecular structures revealed distorted square pyramidal mononuclear complexes: [(L1)Cu(H2O)2](NO3)·3H2O, 1(NO3), [(L2)Cu(H2O)2](NO3)·2H2O·CH3OH, 2(NO3),...
Human α-Synuclein (aS), a 140 amino acid protein, is the main constituent of Lewy bodies, cytoplasmatic deposits found in brains Parkinson's disease patients, where it present an aggregated, fibrillar form. Recent studies have shown that aS metal binding protein. Moreover, heavy ions, particular divalent copper, accelerate aggregation process In this work, we investigated high affinity mode truncated (1-99) (aS99) with Cu(II), stoichiometric ratio, to elucidate residues involved site and...
Degradation processes of paintings, frescos, illuminations, and painted decorations represent a relevant challenge in the cultural heritage field for both conservators scientists dealing with causes these processes. It is very important understanding molecular origin colour changes, like fading, yellowing, blackening, as well damages due to degradation, cracking fall pictorial layers. Metal complexes, often indicated "metal soaps", when referred metal carboxylates, play role degradation....
In this work we address the interpretation, via an ab initio integrated computational approach, of continuous wave electron spin resonance (cw-ESR) spectra p-(methylthio)phenyl nitronylnitroxide (MTPNN) dissolved in toluene. Our approach is based on determination Hamiltonian, averaged with respect to fast vibrational motions, magnetic tensor parameters (Zeeman and hyperfine tensors) characterized by quantum mechanical density functional calculations. The system then described a stochastic...
The occurrence of highly severe silica-related diseases among the resin- and silica-based artificial stone workers was claimed, associated to an extremely short latency. High levels exposure intrinsic properties AS are thought modulate development silicosis auto-immune diseases. This study compares parent materials processed dusts, shed light on changes occurring in manufacturing process, through XRF, EPR XAS investigation. We point out wide variability materials, chemical signatures...
This study presents the petrographic and chemical characterization of frescoes in Church San Panfilo Tornimparte (AQ, Italy) by Saturnino Gatti, a prominent painter late 15th–early 16th century, known for his exquisite technique, composition, use color. The is essential understanding materials techniques used as well identifying stratigraphy painting phases. Eighteen samples were collected from original paint layers, later additions (17th century), restored surfaces, analyzed optical...
The radical anions of three C60 derivatives (N-methyl-3,4-fulleropyrrolidine, N-methyl-2-(3,6,9-trioxadecyl)-3,4-fulleropyrrolidine, and bis-N-methyl-3,4-fulleropyrrolidine are respectively MFP-, tegMFP-, bisMFP-) have been investigated by continuous wave (cw) pulsed EPR in methyltetrahydrofuran tetrahydrofuran solutions. spectra for MFP- tegMFP- show a 1:1:1 triplet, due to the hyperfine coupling with pyrrolidine nitrogen. spectrum bisMFP- shows superimposition two signals, each 1:2:3:2:1...
In recent years, Ru(III) complexes have emerged as a new class of effective anticancer agents against tumors that proved to be resistant all other chemotherapeutic drugs currently in clinical use. To extend our previous studies on metal containing sulfur-donor ligands, we report here the synthesis and characterization, by means several spectroscopic analytical techniques, some [Ru(RSDT)3] [Ru2(RSDT)5]Cl with dithiocarbamato ligands derived from methyl/ethyl/tert-butyl esters sarcosine. Their...
The cross-linked polyurea support EnCat 30, its related macromolecular complex PdII/EnCat 30 and Pd0/EnCat 30NP nanocomposite are thoroughly investigated with SEM, TEM, ISEC ESR in the solid state (SEM TEM) swollen THF (ISEC ESR). obtained by microencapsulation of palladium acetate a framework, which is formed upon hydrolysis/condensation mixtures multi-functional oligo-arylisocyanates dichloroethane. Most remarkably, both turn out to be far more (nano)porous swellable materials than blank...
In this work we report a pre‐restoration spectroscopic study by multi‐technique approach on the green pigment and binder used in illuminations codex of late 15th century. Our analysis aimed to characterize badly deteriorated parts codex, mainly parts, electron paramagnetic resonance ( EPR ), X ‐ray diffraction XRD fluorescence XRF ) infrared spectroscopy ATR‐IR ). We will show that combined IR spectroscopies model systems allowed us refine general information obtained with other techniques...
Abstract In this work, we present a wide‐range spectrochemical analysis of the degradation products from naturally aged paper. The samples obtained wash waters used during de‐acidification treatment leaves 16th‐century‐printed book were analysed through NMR, IR, Raman UV/Vis, EPR and X‐ray fluorescence (XRF) spectroscopy HPLC‐MS inductively coupled plasma (ICP) analysis. By these methods also studied some previous treated by acidification (sample AP) catalytic hydrogenation HP). Crossing all...
Copper acetate (also known as verdigris) is a bimetallic Cu(II) greenish pigment widely used in oil paintings. Since ancient times, this has been degradation-prone compound, especially when combined with lipidic binders. However, the degradation mechanism and involved species have not yet disclosed. In article, we study verdigris interactions linseed painting mock-ups, stressing out formation of copper-based complexes proposing reaction routes. Such complex systems are studied by applying...
The radical anions of two C60 Nteg-fulleropyrrolidine (teg = 3,6,9-trioxadecyl) adducts, the monoadduct and trans1-bisadduct have been studied in liquid solution glassy matrix 2-MeTHF by continuous wave (cw) pulsed X-band EPR cw high-frequency EPR. hyperfine coupling constants 14N nuclei 13C natural abundance determined discussed, also relation with spin density distribution on fullerene sphere obtained restricted Hartree−Fock half-electron approximation (RHF-HE), functional method....