A5063093155- Organometallic Complex Synthesis and Catalysis
- Synthetic Organic Chemistry Methods
- Organoboron and organosilicon chemistry
- Porphyrin and Phthalocyanine Chemistry
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Catalytic Processes in Materials Science
- Oxidative Organic Chemistry Reactions
- Cancer Treatment and Pharmacology
- Innovative Microfluidic and Catalytic Techniques Innovation
- Asymmetric Hydrogenation and Catalysis
- Semiconductor materials and devices
- Asymmetric Synthesis and Catalysis
- Radioactive element chemistry and processing
- Microbial Natural Products and Biosynthesis
- Catalysis and Oxidation Reactions
- Nanomaterials for catalytic reactions
- Carbon dioxide utilization in catalysis
- Magnetism in coordination complexes
- Crystal structures of chemical compounds
- Fluorine in Organic Chemistry
- Photosynthetic Processes and Mechanisms
- Synthesis and Reactions of Organic Compounds
- Metal-Catalyzed Oxygenation Mechanisms
- Chemistry and Chemical Engineering
Institute of Organic Synthesis and Photoreactivity
2014-2022
National Research Council
2016-2022
Center for Biomolecular Nanotechnologies
2014
Sapienza University of Rome
2014
University of Nova Gorica
2014
Institute of Inorganic Methodologies and Plasmas
2014
University of Ljubljana
2014
Istituto Officina dei Materiali
2014
Elettra-Sincrotrone Trieste S.C.p.A.
2014
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2004-2012
We present the main features of CITIUS, a new light source for ultrafast science, generating tunable, intense, femtosecond pulses in spectral range from IR to XUV. The XUV (about 10^5-10^8 photons/pulse 14-80 eV) are produced by laser-induced high-order harmonic generation gas. This radiation is monochromatized time-preserving monochromator, allowing also work with high-resolution bandwidth selection. tunable IR-UV (10^{12}-10^{15} 0.4-5.6 generated an optical parametric amplifier, which...
Cycloalkanes were oxidized by O2 itself under mild conditions (22 °C; 200 Torr of O2) in the presence catalytic amounts a polyhalogenated porphyrin–iron(III)—hydroxo complex irradiated with light wavelength between 350 and 450 nm; these oxidations occurred without consumption reducing agent, selectively transformed cyclohexane into cyclohexanone appropriate (about 0. 2 turnover per min), did not involve FeVO active species but, more probably, iron-alkylperoxo intermediates.
A composite catalyst consisting of an iron porphyrin covalently linked to TiO2 shows a new reactivity in the photochemical mono-oxygenation hydrocarbons under mild conditions, with respect and used separately.
Photoactivatable keratin sponges were prepared from protein aqueous solutions by the freeze-drying method, followed photofunctionalization with two different photosensitizers (PS): Azure A (AzA) and 5,10,15,20-tetrakis [4-(2-N,N,N-trimethylethylthio)-2,3,5,6-tetrafluorophenyl]porphyrin tetraiodide salt (TTFAP). The have a porosity between 49% 80% mean pore size in 37-80 μm range. As compared to AzA, TTFAP interacts more strongly as demonstrated lower PS release (6% vs 20%), decreased...
P. G. Baraldi, A. Barco, S. Benetti, Pollini, E. Polo and D. Simoni, J. Chem. Soc., Commun., 1986, 757 DOI: 10.1039/C39860000757
The styrene oxide to carbonate conversion performed in CO2 atmosphere, herein selected as a case study, was implemented microdroplets (aerosol) reactions at the preparative scale (3.5 mmol of starting material) and mild conditions (1 atm pressure), within custom-made ultrasonic nebulization reactor. Upon optimization promoter stoichiometry eq 4.3 TEG/KI ratio) methanol (MeOH) dilution (7.5 mL 2.5 v/v MeOH/TEG), performances under mass transfer-limited this novel methodological paradigm have...
The crystal structure and vibrational analyses of melamine hydrobromide by FTIR FT-Raman spectra, are presented. crystallographic data show π-electron delocalization towards the amino substituents with ring nitrogen protonation in solid state. Additionally, presence intermolecular hydrogen bonding interactions occurring between lone-pairs gives rise to charge–transfer complexes, as demonstrated UV–VIS reflectance spectra allow assignments modes comparison corresponding deuteriated molecules,...
Abstract A strategy for the immobilization of chiral 2,3‐bisaminocyclopropenium salt (pre‐catalyst) onto polystyrene and silica supports is presented together with a suitable procedure conversion into corresponding cyclopropenimine superbase catalysts. The activity recyclability polystyrene‐ silica‐supported cyclopropenimines were initially tested under batch conditions in model Michael addition detecting comparable efficiencies but superior stability latter heterogeneous catalyst (5 cycles,...
A method for immobilization-stabilization of thermolysin onto activated agarose gels is reported based on the formation covalent bonds between enzyme and support. All derivatives prepared retained 100% enzymatic activity they show higher stability than free thermolysin. The effect different variables concerning strength enzyme-support attachment immobilized has been established under inactivation conditions: presence a water miscible solvent (DMF); stirred biphasic systems, 1,...
The ability of cyclopentadienone to act as the diene counterpart in Diels–Alder reactions was demonstrated through isolation cycloadduct with ethyl acrylate, which utilized starting point for an expeditious synthesis (±)-sarkomycin.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTotal synthesis of (.+-.)-isoclovenePier Giovanni Baraldi, Achille Barco, Simonetta Benetti, Gian Piero Pollini, Eleonora Polo, and Daniele SimoniCite this: J. Org. Chem. 1985, 50, 1, 23–29Publication Date (Print):January 1985Publication History Published online1 May 2002Published inissue 1 January 1985https://pubs.acs.org/doi/10.1021/jo00201a005https://doi.org/10.1021/jo00201a005research-articleACS PublicationsRequest reuse permissionsArticle...
The photolysis of a benzene solution [Tp(Me2)IrH(2)(COE)], 1 (Tp(Me2) = hydrotris(3,5-dimethylpyrazolyl)borate, COE Z-cyclooctene), in the presence P(OMe)(3), gives stable novel complex [Tp(Me2)IrH(C(6)H(5))(P(OMe)(3))], 3a. photochemical syntheses [Tp(Me2)IrH(2)(P(OMe)(3))], from and P(OMe)(3) diethyl ether, [Tp(Me2)IrH(2)(CH(2)=CHCOO(t)Bu)], tert-butyl acrylate, are also reported. above reactions several experiments using C(6)D(6) P(OCD(3))(3) show that, all cases, primary photoproduct is...
Abstract We report here the synthesis of new tethered biscyclopentadienyl and bisindenyl zirconocenes, bearing one unsaturation on interannular bridge, their use as self‐immobilizing catalysts. They proved to be active catalysts towards ethylene polymerization in solution, with activities comparable those displayed by commercial rac ‐Et(Ind) 2 ZrCl . When tested self‐polymerization under suitable experimental conditions, they gave colored precipitates that, once reactivated MAO, were...
The crystal structure, and a complete vibrational analysis by FTIR Raman spectra, of guanylurea hydrochloride are presented. crystallographic results show pronounced π-electron delocalization on the cation presence strong intra- inter-molecular hydrogen bonding interactions between amino groups belonging to guanidine moiety carbonyl oxygen ureic group. This arrangement gives rise polymer-like in which chains laterally bonded Cl– anions water molecules. UV–VlS reflectance spectra agreement...
A tethered ethylenebis(indenyl) zirconocene was covalently immobilized on H-terminated Si(111) surfaces using UV-mediated alkene hydrosilylation, thus making possible the development of structured catalytic with highly controlled properties.
Four tethered titanocene complexes were covalently immobilized onto 3-mercaptopropyl-functionalized silica gel. We have investigated the influence of length tether and ansa-bridge on activity in heterogeneous hydrosilylation cyclic imine 2-phenylpyrroline, taken as an illustrative example. Possible metal leaching during reaction was using ICP/OES, recycling studies three-phase test. The novel catalysts exhibit similar to their homogeneous analogues tested reactions with a TOF ∼20 h−1....
Abstract In this paper we report the synthesis of several unbridged zirconocenes, 1a − c , 2 and 5 each bearing a phenyl substituent in 2‐position cyclopentadienyl ring. We also their photochemical behaviour compare results with those obtained corresponding unsubstituted metallocenes 3a 4 . Study electronic spectra EPR/spin trapping experiments showed photogeneration ligand‐ zirconium‐centred radicals, thus making these complexes suitable as photoinitiators for radical polymerisation...
Abstract New ω‐alkenyl‐substituted ansa ‐bridged bisindenyl zirconium complexes are prepared and tested as self‐immobilized catalysts for ethene polymerization. But, even at very high concentration of the tethered low pressure ethene, there is no evidence their insertion into polyethene chain. A “cross polymerization” test, performed by copolymerizing with using rac ‐Me 2 Si(2‐MeBenzInd) ZrCl ( MBI ), does not lead to incorporation However, corresponding ligand proves be a suitable comonomer...