0000000001301658

AUTHOR

Andrea Baschieri

showing 8 related works from this author

A synergic nanoantioxidant based on covalently modified halloysite–trolox nanotubes with intra-lumen loaded quercetin

2016

We describe the preparation and properties of the first example of a synergic nanoantioxidant, obtained by different functionalizations of the external surface and the inner lumen of halloysite nanotubes (HNTs). Trolox, a mimic of natural α-tocopherol, was selectively grafted on the HNT external surface; while quercetin, a natural polyphenolic antioxidant, was loaded into the inner lumen to afford a bi-functional nanoantioxidant, HNT–Trolox/Que, which was investigated for its reactivity with transient peroxyl radicals and a persistent 1,1-diphenyl-2-picrylhydrazyl (DPPH˙) radical in comparison with the corresponding mono-functional analogues HNT–Trolox and HNT/Que. Both HNT–Trolox and HNT/Q…

halloysite nanotubes antioxidants peroxyl radicals quercetin Trolox synergismAntioxidantRadicalmedicine.medical_treatmentBiomedical Engineering02 engineering and technology010402 general chemistry01 natural scienceschemistry.chemical_compoundReaction rate constantmedicinehalloysite trolox release quercetin antioxidantOrganic chemistryGeneral Materials ScienceAcetonitrileSettore CHIM/02 - Chimica FisicaAutoxidationChemistryGeneral ChemistryGeneral MedicineSettore CHIM/06 - Chimica Organica021001 nanoscience & nanotechnology0104 chemical sciencesChlorobenzeneTrolox0210 nano-technologyQuercetinNuclear chemistry
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Iridium(III) Complexes with Phenyl-tetrazoles as Cyclometalating Ligands

2014

Ir(II) cationic complexes with cyclometalating tetrazolate ligands were prepared for the first time, following a two-step strategy based on (i) a silver-assisted cyclometalation reaction of a tetrazole derivative with IrCl3 affording a bis-cyclometalated solvato-complex P ([Ir(ptrz)(2)(CH3CN)(2)](+), Hptrz = 2-methyl-5-phenyl-2H-tetrazole); (ii) a substitution reaction with five neutral ancillary ligands to get [Ir(ptrz)(2)L](+), with L = 2,2'-bypiridine (1), 4,4'-di-tert-butyl-2,2'-bipyridine (2), 1,10-phenanthroline (3), and 2-(1-phenyl-1H-1,2,3-triazol-4-yl)pyridine (4), and [Ir(ptrz)(2)L-2](+), with L = tertbutyl isocyanide (5). X-ray crystal structures of P, 2, and 3 were solved. Elect…

Substitution reactionIr(III) complexePhenanthrolineIsocyanidechemistry.chemical_elementphenyl tetrazolesPhotochemistryMedicinal chemistryInorganic Chemistrychemistry.chemical_compoundBipyridinechemistryPyridineEMITTING ELECTROCHEMICAL-CELLS; TRANSITION-METAL-COMPLEXES; IR(III) COMPLEXES; ELECTROLUMINESCENT DEVICES; ANCILLARY LIGAND; SOLID-STATE; PHOTOPHYSICAL PROPERTIES; POLYPYRIDINE COMPLEXES; BLUE PHOSPHORESCENCE; ISOCYANIDE COMPLEXESTetrazoleIridiumPhysical and Theoretical ChemistryAcetonitrile
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Nanosponges for the protection and release of the natural phenolic antioxidants quercetin, curcumin and phenethyl caffeate

2020

The inclusion of polyphenols into nanoporous materials may significantly improve their application as radical trapping agents for therapeutic purposes. In the present work, nanosponges based on hypercross- linked cyclodextrins and calixarenes (NS1–NS3) were used as carriers of three natural phenolic antioxidants: quercetin (Que), curcumin (Cur) and phenethyl caffeate (Phec). Good w/w loadings, namely 7.3% for the Que–NS1 composite, 17.3% for Cur–NS2 and 12.9% for Phec–NS3, were achieved. The release kinetics and the inhibition rate constants (kinh) of the reaction with alkylperoxyl radicals (ROO.) in 0.1 M phosphate buffer solutions at pH 7.4 were studied and indicated better antioxidant ac…

AntioxidantRadicalmedicine.medical_treatmentnanosponges02 engineering and technology010402 general chemistryrelease01 natural scienceschemistry.chemical_compoundReaction rate constantmedicineOrganic chemistryGeneral Materials SciencePhenolspolyphenolsSettore CHIM/06 - Chimica Organica021001 nanoscience & nanotechnologyControlled release0104 chemical scienceschemistryChemistry (miscellaneous)PolyphenolCurcuminquercitin curcumin phenethyl caffeate nanosponges antioxidant activity0210 nano-technologyQuercetin
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Anionic Cyclometalated Iridium(III) Complexes with a Bis-Tetrazolate Ancillary Ligand for Light-Emitting Electrochemical Cells

2017

none 10 si A series of monoanionic Ir(III) complexes (2-4) of general formula [Ir(C^N)2(b-trz)](TBA) are presented, where C^N indicates three different cyclometallating ligands (Hppy = 2-phenylpyridine; Hdfppy = 2-(2,4-difluoro-phenyl)pyridine; Hpqu = 2-methyl-3-phenylquinoxaline), b-trz is a bis-tetrazolate anionic N^N chelator (H2b-trz = di(1H-tetrazol-5-yl)methane), and TBA = tetrabutylammonium. 2-4 are prepared in good yields by means of the reaction of the suitable b-trz bidentate ligand with the desired iridium(III) precursor. The chelating nature of the ancillary ligand, thanks to an optimized structure and geometry, improves the stability of the complexes, which have been fully char…

Ligand field theoryLuminescenceoptoelectronicsChemistryLigandLECCationic polymerizationQuantum yieldchemistry.chemical_element02 engineering and technologyIridium010402 general chemistry021001 nanoscience & nanotechnologyPhotochemistry01 natural sciences0104 chemical sciencesInorganic Chemistrychemistry.chemical_compoundPyridinePhysical and Theoretical Chemistry; Inorganic ChemistryDensity functional theoryIridiumPhysical and Theoretical Chemistry0210 nano-technologyHOMO/LUMO
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CCDC 987700: Experimental Crystal Structure Determination

2014

Related Article: Filippo Monti, Andrea Baschieri, Isacco Gualandi, Juan J. Serrano-Pérez, José M. Junquera-Hernández, Domenica Tonelli, Andrea Mazzanti, Sara Muzzioli, Stefano Stagni, Cristina Roldan-Carmona, Antonio Pertegás, Henk J. Bolink, Enrique Ortí, Letizia Sambri, and Nicola Armaroli|2014|Inorg.Chem.|53|7709|doi:10.1021/ic500999k

Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinatesbis(Acetonitrile)-bis(2-(2-methyl-2H-tetrazol-5-yl)phenyl)-iridium tetrafluoroborate acetonitrile solvate
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CCDC 1555727: Experimental Crystal Structure Determination

2017

Related Article: Elia Matteucci, Andrea Baschieri, Andrea Mazzanti, Letizia Sambri, Jorge Ávila, Antonio Pertegás, Henk J. Bolink, Filippo Monti, Enrico Leoni, and Nicola Armaroli|2017|Inorg.Chem.|56|10584|doi:10.1021/acs.inorgchem.7b01544

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterstetra-n-butylammonium (55'-methylenebis(tetrazol-1-yl))-bis(2-(3-methylquinoxalin-2-yl)phenyl)-iridium(iii)Experimental 3D Coordinates
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CCDC 987698: Experimental Crystal Structure Determination

2014

Related Article: Filippo Monti, Andrea Baschieri, Isacco Gualandi, Juan J. Serrano-Pérez, José M. Junquera-Hernández, Domenica Tonelli, Andrea Mazzanti, Sara Muzzioli, Stefano Stagni, Cristina Roldan-Carmona, Antonio Pertegás, Henk J. Bolink, Enrique Ortí, Letizia Sambri, and Nicola Armaroli|2014|Inorg.Chem.|53|7709|doi:10.1021/ic500999k

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters(44'-Di-t-butyl-22'-bipyridine)-bis(2-(2-methyl-2H-tetrazol-5-yl)phenyl)-iridium tetrafluoroborate dichloromethane solvateExperimental 3D Coordinates
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CCDC 987699: Experimental Crystal Structure Determination

2014

Related Article: Filippo Monti, Andrea Baschieri, Isacco Gualandi, Juan J. Serrano-Pérez, José M. Junquera-Hernández, Domenica Tonelli, Andrea Mazzanti, Sara Muzzioli, Stefano Stagni, Cristina Roldan-Carmona, Antonio Pertegás, Henk J. Bolink, Enrique Ortí, Letizia Sambri, and Nicola Armaroli|2014|Inorg.Chem.|53|7709|doi:10.1021/ic500999k

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parametersbis(2-(2-Methyl-2H-tetrazol-5-yl)phenyl)-(110-phenanthroline)-iridium tetrafluoroborate dichloromethane solvateExperimental 3D Coordinates
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