A5011101525- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Crystallography and molecular interactions
- Lanthanide and Transition Metal Complexes
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Porphyrin and Phthalocyanine Chemistry
- Quantum and electron transport phenomena
- Organometallic Complex Synthesis and Catalysis
- 2D Materials and Applications
- Solid-state spectroscopy and crystallography
- Molecular Junctions and Nanostructures
- Gold and Silver Nanoparticles Synthesis and Applications
- Electron Spin Resonance Studies
- Advanced NMR Techniques and Applications
- Nanocluster Synthesis and Applications
- Coordination Chemistry and Organometallics
- Surface Chemistry and Catalysis
- Semiconductor Quantum Structures and Devices
- Organic and Molecular Conductors Research
- Magnetic properties of thin films
- Chalcogenide Semiconductor Thin Films
- Radioactive element chemistry and processing
- Magnetic Properties and Synthesis of Ferrites
University of Milano-Bicocca
2019-2024
Linköping University
2018-2020
University of Nottingham
2010-2019
University of Manchester
2013-2015
Istituto Nanoscienze
2010-2012
University of Modena and Reggio Emilia
2008-2012
We report ac susceptibility and continuous wave pulsed EPR experiments performed on ${\mathrm{GdW}}_{10}$ ${\mathrm{GdW}}_{30}$ polyoxometalate clusters, in which a ${\mathrm{Gd}}^{3+}$ ion is coordinated to different moieties. Despite the isotropic character of gadolinium as free ion, these molecules show slow magnetic relaxation at very low temperatures, characteristic single molecule magnets. For $T\ensuremath{\lesssim}200\text{ }\text{ }\mathrm{mK}$, spin-lattice becomes dominated by...
The two-dimensional self-assembly of a terbium(III) double-decker phthalocyanine on highly oriented pyrolitic graphite (HOPG) was studied by atomic force microscopy (AFM), and it shown that forms regular rectangular nanocrystals the surface, are aligned with symmetry axes, in which molecules organized lattice as scanning tunneling microscopy. Molecular dynamics simulations were run order to model behavior collection complexes HOPG. results excellent agreement experiment, showing that—after...
We report attempts to prepare uranyl(VI)- and uranium(VI) carbenes utilizing deprotonation oxidation strategies. Treatment of the uranyl(VI)-methanide complex [(BIPMH)UO(2)Cl(THF)] [1, BIPMH = HC(PPh(2)NSiMe(3))(2)] with benzyl-sodium did not afford a uranyl(VI)-carbene via deprotonation. Instead, one-electron reduction isolation di- trinuclear [UO(2)(BIPMH)(μ-Cl)UO(μ-O){BIPMH}] (2) [UO(μ-O)(BIPMH)(μ(3)-Cl){UO(μ-O)(BIPMH)}(2)] (3), respectively, concomitant elimination dibenzyl, was...
UCo bond: Reduction of [U(TsXy)(Cl)(thf)] [1; TsXy=HC(SiMe2NAr)3; Ar=3,5-Me2C6H3] with KC8 in toluene afforded the new arene-bridged diuranium complex 2, whereas reduction 1 aliphatic hydrocarbons resulted CN bond activation and formation an imido-aryl complex, which exhibits unusual ferromagnetic interaction between two uranium centers. The synthetic utility 2 was demonstrated by first synthesis a [U(TsXy)Co(CO)3(PPh3)] (3). Detailed facts importance to specialist readers are published as...
A straightforward oxidation strategy affords the first pentavalent uranium carbene complex, 2. Owing to structural similarity of 1 and 2, it was possible for time directly probe differences in UC bonding on UIV UV.
We have investigated the crystal field splitting in archetypal lanthanide-based single-ion magnets and related complexes (NBu4)+[LnPc2]−·2dmf (Ln = Dy, Ho, Er; dmf N,N-dimethylformamide) by means of far infrared inelastic neutron scattering spectroscopies. In each case, we found several features corresponding to direct transitions within ground multiplet. The observation three independent peaks holmium derivative enabled us derive parameters. addition, carried out CASSCF calculations. show...
Abstract Proposals for systems embodying condensed matter spin qubits cover a very wide range of length scales, from atomic defects in semiconductors all the way to micron-sized lithographically defined structures. Intermediate scale molecular components exhibit advantages both limits: like defects, large numbers identical can be fabricated; as structures, each component tailored optimise properties such quantum coherence. Here we demonstrate what is perhaps most potent advantage qubits,...
Uranium magnets: Three uranium(III) complexes with distinctly different structures and compositions are all shown to display slow relaxation of the magnetization. This study greatly expands range slowly relaxing uranium complexes, demonstrates that this behavior is not limited specific ligand types or molecular symmetries (see picture). As a service our authors readers, journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for online...
Spintronics holds great potential for next-generation high-speed and low-power consumption information technology. Recently, lead halide perovskites (LHPs), which have gained success in optoelectronics, also show interesting magnetic properties. However, the spin-related properties LHPs originate from spin-orbit coupling of Pb, limiting further development these materials spintronics. Here, we demonstrate a new generation perovskites, by alloying elements into optoelectronic double provide...
We report here the synthesis of undoped and Cu-doped Cs2ZnCl4 nanocrystals (NCs) in which we could tune concentration Cu from 0.7 to 7.5%. has a wide band gap (4.8 eV), its crystal structure is composed isolated ZnCl4 tetrahedra surrounded by Cs+ cations. According our electron paramagnetic resonance analysis, 2.1% NCs ions were present +1 oxidation state only, while at higher concentrations detect Cu(II) (isovalently substituting Zn(II) ions). The non emissive, samples had bright intragap...
Doping of organic semiconductors is a powerful tool to optimize the performance various (opto)electronic and bioelectronic devices. Despite recent advances, low thermal stability electronic properties doped polymers still represents significant obstacle implementing these materials into practical applications. Hence, development conducting with excellent long-term at elevated temperatures highly desirable. Here, we report on sequential doping ladder-type polymer...
An unsupported uranium–rhenium bond has been prepared by alkane elimination treatment of a cyclometallated alkyl uranium triamidoamine complex with rhenocene hydride (see scheme). DFT analysis reveals σ and π combinations in the URe bond, but rhenium contributions dominate an atoms-in-molecules closed-shell, predominantly ionic interaction. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, not copy-edited or typeset....
Ring a ring of roses: Spectacular nanoscale molecular assemblies have been created by design individual polymetallic components that are then linked together through simple reactions. These include an assembly where six octametallic rings surround dodecametallic central ring.
Antimony-based 0-dimensional metal halides (0D-MHs) are attracting attention owing to their bright Stokes-shifted luminescence due self-trapped excitons (STEs). One unexplored motif expand functionalities is dope them with optically and/or magnetically active dopants that participate in energy-transfer schemes involving STEs. We investigated the photophysical and magnetic properties of Rb7Sb3Cl16 nanocrystals doped Mn2+ ions, which introduce strong magnetism activate characteristic intra-d...
Abstract 2D magnets represent material systems in which magnetic order and topological phase transitions can be observed. Based on these phenomena, novel types of computing architectures magnetoelectronic devices envisaged. Unlike conventional films, their magnetism is independent the substrate interface qualities, properties manifest even formally bulk single crystals. However, layered materials rarely reported often due to weak exchange interactions anisotropy, low transition temperatures....
Doping a Cr7Zn molecular nanomagnet into diamagnetic and isostructural host allows pulsed X-band EPR on single crystals, including relaxation nutation experiments the S = 3/2 ground state.
We deeply investigated the properties of submonolayer distributions isolated molecular ${\text{Cr}}_{7}\text{Ni}$ rings deposited on Au(111) by liquid phase. X-ray absorption spectra measured at Cr and $\text{Ni}\text{ }{\text{L}}_{2,3}$ edges show that grafting onto gold surface does not affect oxidation state local symmetry Ni sites. The circular dichroism shows a change in sign magnetic moment. This is due to reduction exchange coupling constants that, however, preserves structure...
Five-coordinate Zn(II), Ni(II), and Cu(II) complexes containing pentadentate N(3)O(2) Schiff base ligands [1A](2-) [1B](2-) have been synthesized characterized. X-ray crystallographic studies reveal five coordinate structures in which each metal ion is bound by two imine N-donors, phenolate O-donors, a single amine N-donor. Electron paramagnetic resonance (EPR) spectroscopic suggest that the coordination spheres of [Cu(1A)] [Cu(1B)] are retained CH(2)Cl(2) solution solid-state...
Hybrid [2]rotaxanes and pseudorotaxanes are reported where the magnetic interaction between dissimilar spins is controlled to create AB AB2 electron spin systems, allowing independent control of weakly interacting S=${{ 1/2 }}$ centers.
Bisphthalocyaninato terbium complexes show a long magnetization relaxation time at relatively high temperatures---which makes them very interesting as magnets single-molecule level. Their technological exploitation, however, requires the addressing of individual molecules, therefore deposition on surfaces is topic great interest interaction with substrate can play crucial role in definition molecule properties. In this work we investigate electronic and magnetic properties anionic neutral...
We study the magnetic properties of two new functionalized single-molecule magnets belonging to Mn6 family (general formula [MnIII6O2(R-sao)6(O2C-th)2L4−6], where R = H (1) or Et (2), HO2C-th 3-thiophene carboxylic acid, L EtOH, H2O and saoH2 is salicylaldoxime) their grafting on Au(111) surface. Complex 1 exhibits spin ground-state S 4, as result ferromagnetic coupling between antiferromagnetic MnIII3 triangles, while slight structural changes in complex 2, switch dominant exchange...