A5083664659- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Organic and Molecular Conductors Research
- Perovskite Materials and Applications
- Lanthanide and Transition Metal Complexes
- Nonlinear Optical Materials Research
- Crystallography and molecular interactions
- Metal complexes synthesis and properties
- Luminescence Properties of Advanced Materials
- Photochemistry and Electron Transfer Studies
- Crystal structures of chemical compounds
- Porphyrin and Phthalocyanine Chemistry
- Extraction and Separation Processes
- Organometallic Compounds Synthesis and Characterization
- Molecular Junctions and Nanostructures
- Electrocatalysts for Energy Conversion
- Metal-Organic Frameworks: Synthesis and Applications
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Nanoporous metals and alloys
- Luminescence and Fluorescent Materials
- Ionic liquids properties and applications
- CO2 Reduction Techniques and Catalysts
- Radical Photochemical Reactions
- Organic Light-Emitting Diodes Research
University of Cagliari
2016-2025
Ghent University
2023
Italian Institute of Technology
2021
National Research Council
2021
University of Edinburgh
2012-2020
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2004-2016
National Interuniversity Consortium of Materials Science and Technology
2013-2016
Universitat de València
2004-2007
Centre National de la Recherche Scientifique
2002-2007
Laboratoire de Chimie de Coordination
2002-2007
The beneficial nutrients and biologically active ingredients extracted from plants have received great attention in the prevention treatment of several diseases, including hypercholesterolemic, cancer, diabetes, cardiovascular disorders, hypoglycemic, hypolipidemic, edema, joint pain, weight control, eye vision problems, neuroprotective effects, asthma. Highly predominantly exist fruit cladodes, known as phytochemicals (rich contents minerals, betalains, carbohydrates, vitamins,...
A seventh blind test of crystal structure prediction was organized by the Cambridge Crystallographic Data Centre featuring seven target systems varying complexity: a silicon and iodine-containing molecule, copper coordination complex, near-rigid cocrystal, polymorphic small agrochemical, highly flexible drug candidate, morpholine salt. In this first two parts focusing on generation methods, many (CSP) methods performed well for but agrochemical compound, successfully reproducing...
We report the first combined optical and structural investigation of water free Er-quinolinolate complex, an organo-lanthanide system interest for 1.5-microm telecom applications. Structural data demonstrate that complex has a trinuclear structure (Er3Q9) which provides Er metals with octa-coordination by organic ligand prevents solvent molecules from entering lanthanide coordination sphere. The results analysis allow us to infer strong luminescence quenching exhibited Er3Q9 is due uniquely...
The paper presents a detailed experimental and theoretical study of the four mixed nickel-bisdithiolene complexes [Ni(Pr(i)(2)pipdt)(dmit)] (1b, Pr(i)(2)pipdt = 1,4-diisopropyl-piperazine-3,2-dithione; dmit 1,3-dithiolo-2-tione-4,5-dithiolato), [Ni(R(2)pipdt)(mnt)] (2b", R 2-ethylhexyl; mnt maleonitriledithiolato), [Ni(Pr(i)(2)timdt)(dmit)] (3b, Pr(i)(2)timdt 1,3-diisopropyl-imidazoline-2,4,5-trithione), [Ni(Pr(i)(2)timdt)(mnt)] (4b), their models. All complexes, with common...
We investigate the quenching of near infrared light emission in Er3+ complexes induced by resonant dipolar interaction between rare-earth ion and high frequency vibrations organic ligand. The nonradiative decay rate lanthanide is discussed terms a continuous medium approximation, which depends only on few, easily accessible spectroscopic structural data. model accounts well for available experimental results complexes, predicts an ∼100% quantum yield fully halogenated systems.
Abstract Erbium quinolinolates, commonly assumed to be mononuclear species with octahedral co‐ordination geometry, have been proposed as promising materials for photonic devices but difficulties in obtaining well defined products so far limited their use. We report here the conditions obtain high yields three different kinds of pure neutral erbium quinolinolates by mixing an salt 8‐quinolinol (HQ) and 5,7‐dihalo‐8‐quinolinol (H5,7XQ: X = Cl Br): i) trinuclear complex Er 3 Q 9 ( 1 ) which is...
A variety of silver(I) neutral complexes differing in stoichiometries and/or crystallographic arrangements have been obtained by reacting [HMe2pipdt]I3 (1) (Me2pipdt = N,N′-dimethyl-piperazine-2,3-dithione) with silver as a metal powder and 1+ ion. Once dissolved THF, 1 reacts powder, affording different ligand/metal ratios: [Ag(Me2pipdt)2]I3 (2a) [Ag(Me2pipdt)I]2(3) (in the two 3a 3b). The polymer [Ag2(Me2pipdt)I2]n (4) monomer (2b) are instead when AgSbF6 CH3CN. short intermetallic...
The synthesis and full characterization of the redox-active nickel triad mixed-ligand dithiolene complexes based on Bz2pipdt = 1,4-dibenzylpiperazine-3,2-dithione dmit 2-thioxo-1,3-dithiole-4,5-dithiolate ligands are reported. These show a reversibly bleacheable solvatochromic peak remarkably high negative molecular first hyperpolarizability, whose values depend metal being highest for platinum(II) compound.
Synthesis, characterization, NLO properties, and theoretical studies of the mixed-ligand dithiolene complexes nickel triad [M(II)(Bz(2)pipdt)(mnt)] (Bz(2)pipdt = 1,4-dibenzyl-piperazine-3,2-dithione, mnt maleonitriledithiolato, M(II) Ni, 1, Pd, 2, Pt, 3) are reported. Molecular structural characterization 1-3 points out that four sulfur atoms in a slightly distorted square-planar geometry. While M-S bond distances only different, comparison C-C C-S bonds C(2)S(2)MS(2)C(2) core allows us to...
This work presents the HX responsiveness of heteroleptic Donor-M-Acceptor dithiolene complexes: Bu4N[MII(L1)(L2)] [M=Ni(1), Pd(2), Pt(3)], where L1 is a chiral acceptor ligand [(R)-α-MBAdto] and L2 donor (tdas). Addition hydrohalic acids induces strong bathochromic shift visible color change, which fully reversed by ammonia (NH₃). Moreover, sensing capability 1 has been further evaluated deposition on cellulose substrate. Exposure to HCl vapors an evident change from purple green, whereas...
The mixed-ligand dithiolene complex [Pt(Bz2pipdt)(dcbdt)] (1) bearing the two ligands Bz2pipdt = 1,4-dibenzyl-piperazine-3,2-dithione and dcbdt dicyanobenzodithiolato, has been synthesized, characterized studied to evaluate its second-order optical nonlinearity. dithione/dithiolato character of gives rise an asymmetric distribution charge in molecule. This is reflected by structural data showing that C2S2PtS2C2 core four sulfur atoms define a square-planar coordination environment metal...
Owing to their unique luminescent properties and photosensitizing capability, cyanoruthenium(II) complexes with diimine ligands are the subject of intense research striving for routes tuning electronic improving emission quantum yield. In this work, we describe a heterometallic d-f cyanide-bridged Ru(II)–Er(III) assembly obtained by direct reaction trivalent erbium salt neutral [Ru(bipy)2(CN)2] (bipy = 2,2′-bipyridine) metalloligand. This strategy allows accommodating inorganic negatively...
A simple method to obtain in high yields mixed-ligand nickel-dithiolene complexes, which show strong negative solvatochromism and first molecular hyperpolarizability, the use of Raman spectroscopy establish extent electronic delocalisation these are reported.
The mixed-ligand complexes [M(II)(Et2dazdt)(mnt)] (M = Ni, 1; Pd, 2; Pt, 3) [Et2dazdt N,N′-diethyl-perhydrodiazepine-2,3-dithione; mnt maleonitrile-2,3-dithiolate] have been prepared and fully characterized. X-ray diffractometric studies on 1–3 (the structure of 1 was already known) show that the crystals are isostructural (triclinic, P–1), two independent molecular entities present in unit cell. These differ orientation ethyl substituents with respect to epta-atomic ring. In C2S2MS2C2...
We report the synthesis, characterization, nonlinear-optical (NLO) properties, and density functional theory (DFT) calculations for three nickel diiminedithiolate complexes [Ni(4,4'-R2carboxy-bpy)(L)] [R = methyl, L 1,2-benzenedithiolate (bdt), 1; R ethyl, 5,6-dihydro-1,4-dithine-2,3-dithiolate (dddt), 2; 1-(N-methylindol-5-yl)ethene-1,2-dithiolate (mi-5edt), 3]. The crystal structure of 1 shows a square-planar coordination ion bond distances consistent with description complex. For all...
Magnetic scaffolds have been investigated as promising tools for the interstitial hyperthermia treatment of bone cancers, to control local recurrence by enhancing radio- and chemotherapy effectiveness. The potential magnetic motivates development production strategies enabling tunability resulting properties. Within this framework, deposition drop-casting nanoparticles on suitable offer advantages such ease high loading, although these approaches are often associated with a non-uniform final...
The self-assembly reaction of the neutral dicyano-bis(1,10-phenanthroline) iron(II) complex with lanthanide ions (Ln = Eu(III), Gd(III), Er(III)) provided two different classes heterometallic cyano-bridged 3d-4f architectures depending on nature counteranion, irrespective size 4f metal ion. Tetranuclear oligomers a squared Fe2Ln2 core were isolated when using nitrate salts, whereas unusual 1D polymeric chains obtained resorting to triflate salts under same synthetic conditions. It is shown...
New [M(R(2)pipdt)(2)](BF(4))(2) salts [R(2)pipdt = N,N'-dialkyl-piperazine-2,3-dithione; M Pd(II), R Me and Pt(II), Me, Et, Pr(i)] bearing redox-active cationic dithiolene complexes have been prepared characterized. These cations react with the [M(mnt)(2)](2-) [M Pt(II); mnt maleonitrile-2,3-dithiolate] anionic dithiolenes to form describable as ion pair charge-transfer complexes. X-ray crystallographic studies shown that [M(Me(2)pipdt)(2)][M(mnt)(2)] complexes, Pd(II) are isomorphous....
We describe here an innovative method for Pd-dissolution using the reagent N,N'-dimethylperhydrodiazepine-2,3-dithione diiodine adduct which, being safe and powerful, is appealing practical applications: remarkably almost quantitative Pd-recovery from model spent three-way catalysts has been obtained, showing that effectiveness of maintained when palladium contained in a complex system such as car catalyst, ceramic material which undergone severe thermal stress.
The donor-acceptor type mixed-ligand complexes [M(Bz(2)pipdt)(dsit)]; dsit = 2-thioxo-1,3-dithiole-4,5-diselenolato (donor); Bz(2)pipdt 1,4-dibenzyl-piperazine-2,3-dithione (acceptor); M(II) Ni (1), Pd (2), and Pt (3) were prepared characterized to investigate the variation of properties by substituting selenium for sulfur in donor ligand dmit 2-thioxo-1,3-dithiole-4,5-dithiolato corresponding known complexes. Both these classes exhibit large negative second-order polarizabilities, amongst...