Andrea Baschieri
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View article: Positional Fluorination of Phenylpyridine: Unexpected Electronic Tuning in Bis-Cyclometalated Iridium(III) Acetylacetonate Complexes
Positional Fluorination of Phenylpyridine: Unexpected Electronic Tuning in Bis-Cyclometalated Iridium(III) Acetylacetonate Complexes Open
We report a systematic study on the effect of positional fluorination of 2-phenylpyridine (Hppy) cyclometalating ligands in neutral iridium(III) complexes of general formula [Ir(Fppy)2(acac)], where Fppy = 2-(fluorophenyl)pyridine and acac…
View article: Solvent Effects on C–H Abstraction by Hydroperoxyl Radicals: Implication for Antioxidant Strategies
Solvent Effects on C–H Abstraction by Hydroperoxyl Radicals: Implication for Antioxidant Strategies Open
Kinetic solvent effects (KSE) on hydrogen atom transfer (HAT) reactions play a pivotal role in processes such as photoredox catalysis, electrochemical synthesis, and antioxidant defense. While general principles of KSE are well established…
View article: Radical‐Trapping and Hydroperoxide‐Decomposing Benzoselenazole Antioxidants with Potential Biological Applications against Oxidative Stress
Radical‐Trapping and Hydroperoxide‐Decomposing Benzoselenazole Antioxidants with Potential Biological Applications against Oxidative Stress Open
The synthesis of phenolic benzoselenazoles has been described. These were synthesized from their corresponding diselenides and aldehydes using acetic acid as a catalyst. All compounds have been tested for glutathione peroxidase (GPx)‐like …
View article: Near-infrared phosphorescence in a ruthenium(<scp>ii</scp>) complex equipped with a pyridyl-1,2-azaborine ligand
Near-infrared phosphorescence in a ruthenium(<span>ii</span>) complex equipped with a pyridyl-1,2-azaborine ligand Open
The pyridyl-1,2-azaborine ligand was successfully employed for the synthesis of a ruthenium( ii ) complex, displaying near-infrared emission at room temperature.
View article: Long-chain surface-modified red-emitting carbon dots as fluorescent additives for 3D printing vat-photopolymerization
Long-chain surface-modified red-emitting carbon dots as fluorescent additives for 3D printing vat-photopolymerization Open
Red-emitting carbon dots from renewable materials can be used as fluorescent additives in 3D-printing vat-photopolymerization.
View article: Pro‐aromatic Natural Terpenes as Unusual “Slingshot” Antioxidants with Promising Ferroptosis Inhibition Activity
Pro‐aromatic Natural Terpenes as Unusual “Slingshot” Antioxidants with Promising Ferroptosis Inhibition Activity Open
Ferroptosis is a cell death mechanism based on extensive cellular membrane peroxidation, implicated in neurodegenerative and other diseases. The essential oil component γ‐terpinene, a natural monoterpene with a unique highly oxidizable pro…
View article: Stereoisomeric Homo‐ and Hetero‐Binuclear Iridium(III) Complexes with 3‐Oxidopicolinate Bridging Ligand and Their Application in OLEDs
Stereoisomeric Homo‐ and Hetero‐Binuclear Iridium(III) Complexes with 3‐Oxidopicolinate Bridging Ligand and Their Application in OLEDs Open
The small and simple 3‐hydroxypyridine‐2‐carboxylic acid ( Hpic‐OH ) is explored as asymmetric bridging ligand for the synthesis of neutral binuclear cyclometalated iridium(III) complexes. Once fully deprotonated the picO 2– ligand can act…
View article: Ultrafast Near‐Infrared Luminescence from Cyclometalated Iridium(III) Complexes with Indirubin as Ancillary Ligand
Ultrafast Near‐Infrared Luminescence from Cyclometalated Iridium(III) Complexes with Indirubin as Ancillary Ligand Open
Being a constitutional isomer of the indigo dye, indirubin has been known as a purple colourant for a long time. On the other hand, its structural and photophysical properties as ligand in metal complexes are virtually unexplored. Herein, …
View article: Kinetic study of the reaction of thiophene-tocopherols with peroxyl radicals enlightenings the role of O˙⋯S noncovalent interactions in H-atom transfer
Kinetic study of the reaction of thiophene-tocopherols with peroxyl radicals enlightenings the role of O˙⋯S noncovalent interactions in H-atom transfer Open
Three α-tocopherol thiophene derivatives were efficiently synthesized and used as chain-breaking antioxidants for the inhibition of the autoxidation of oxidizable substrates.
View article: CCDC 2249817: Experimental Crystal Structure Determination
CCDC 2249817: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2178977: Experimental Crystal Structure Determination
CCDC 2178977: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Ruthenium (0) complexes with NHC tetrazolylidene ligands: Synthesis, characterization and reactivity
Ruthenium (0) complexes with NHC tetrazolylidene ligands: Synthesis, characterization and reactivity Open
Here we present two new phenyl-tetrazolylidene carbenes as ligands in non-mesoionic (1,4-substitution pattern) and mesoionic (1,3-substitution pattern) tetrazolylidene-cyclopentadienone ruthenium(0) complexes namely 1
\nand 2 respectively.…
View article: Hydroperoxyl radical (HOO<sup>•</sup>) as a reducing agent: unexpected synergy with antioxidants. A review
Hydroperoxyl radical (HOO<sup>•</sup>) as a reducing agent: unexpected synergy with antioxidants. A review Open
This review highlights the progress made in recent years in harnessing the peculiar chemistry of the hydroperoxyl, or perhydroxyl, radical (HOO•) during lipid peroxidation, particularly with regard to its interaction with antioxidants. The…
View article: CCDC 2193011: Experimental Crystal Structure Determination
CCDC 2193011: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: A Pyridyl-1,2-azaborine Ligand for Phosphorescent Neutral Iridium(III) Complexes
A Pyridyl-1,2-azaborine Ligand for Phosphorescent Neutral Iridium(III) Complexes Open
A novel 1,2-azaborine (i.e., 4-methyl-2-(pyridin-2-yl)-2,1-borazaronaphthalene, 1a) has been synthesized and used for the first time as a B-N alternative to common cyclometalating ligands to obtain neutral phosphorescent iridium(III) compl…
View article: Reaction with ROO• and HOO• Radicals of Honokiol-Related Neolignan Antioxidants
Reaction with ROO• and HOO• Radicals of Honokiol-Related Neolignan Antioxidants Open
Honokiol is a natural bisphenol neolignan present in the bark of Magnolia officinalis, whose extracts have been employed in oriental medicine to treat several disorders, showing a variety of biological properties, including antitumor activ…
View article: Unexpected reactivity of cyclometalated iridium(<scp>iii</scp>) dimers. Direct synthesis of a mononuclear luminescent complex
Unexpected reactivity of cyclometalated iridium(<span>iii</span>) dimers. Direct synthesis of a mononuclear luminescent complex Open
In the presence of suitable amounts of water and base, the archetypical [Ir(ppy) 2 (μ-Cl)] 2 dimer forms a complex with the formula [Ir(ppy) 2 (Oppy)].
View article: Iridium-Functionalized Cellulose Microcrystals as a Novel Luminescent Biomaterial for Biocomposites
Iridium-Functionalized Cellulose Microcrystals as a Novel Luminescent Biomaterial for Biocomposites Open
Microcrystalline cellulose (MCC) is an emerging material with outstanding properties in many scientific and industrial fields, in particular as an additive in composite materials. Its surface modification allows for the fine-tuning of its …
View article: CCDC 2153057: Experimental Crystal Structure Determination
CCDC 2153057: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: 4-Phenyl-1,2,3-triazoles as Versatile Ligands for Cationic Cyclometalated Iridium(III) Complexes
4-Phenyl-1,2,3-triazoles as Versatile Ligands for Cationic Cyclometalated Iridium(III) Complexes Open
Five cationic iridium(III) complexes (1-5) were synthesized exploiting two triazole-based cyclometalating ligands, namely, 1-methyl-4-phenyl-1H-1,2,3-triazole (A) and the corresponding mesoionic carbene 1,3-dimethyl-4-phenyl-1H-1,2,3-triaz…
View article: Methods to Determine Chain-Breaking Antioxidant Activity of Nanomaterials beyond DPPH•. A Review
Methods to Determine Chain-Breaking Antioxidant Activity of Nanomaterials beyond DPPH•. A Review Open
This review highlights the progress made in recent years in understanding the mechanism of action of nanomaterials with antioxidant activity and in the chemical methods used to evaluate their activity. Nanomaterials represent one of the mo…
View article: Asymmetric Organocatalysis Accelerated via Self‐Assembled Minimal Structures
Asymmetric Organocatalysis Accelerated via Self‐Assembled Minimal Structures Open
Self‐assembling minimalistic peptides embedded with an organocatalytic moiety were designed. By controlling the formation of fibrils via external intervention, it was shown that the activation is accelerated when the organocatalyst is in i…
View article: Absolute Antioxidant Activity of Five Phenol-Rich Essential Oils
Absolute Antioxidant Activity of Five Phenol-Rich Essential Oils Open
Essential oils (EOs) have promising antioxidant activities which are gaining interest as natural alternatives to synthetic antioxidants in the food and cosmetic industries. However, quantitative data on chain-breaking activity and on the k…
View article: Graphical Abstract: Angew. Chem. Int. Ed. 28/2021
Graphical Abstract: Angew. Chem. Int. Ed. 28/2021 Open
After more than seven decades, Criegee intermediates (CIs) are back at the forefront of modern chemistry.They play an important role in the mechanisms of chemical reactions, total synthesis, pharmaceuticals, climate-controlling aerosol for…
View article: Nitroxides as Building Blocks for Nanoantioxidants
Nitroxides as Building Blocks for Nanoantioxidants Open
Nitroxides are an important class of radical trapping antioxidants whose promising biological activities are connected to their ability to scavenge peroxyl (ROO•) radicals. We have measured the rate constants of the reaction with ROO• (kin…
View article: SET and HAT/PCET acid‐mediated oxidation processes in helical shaped fused bis‐phenothiazines
SET and HAT/PCET acid‐mediated oxidation processes in helical shaped fused bis‐phenothiazines Open
Helical shaped fused bis ‐phenothiazines 1 – 9 have been prepared and their red‐ox behaviour quantitatively studied. Helicene radical cations (Hel .+ ) can be obtained either by UV‐irradiation in the presence of PhCl or by chemical oxidati…
View article: Hydrogen Atom Transfer from HOO<sup>.</sup> to <i>ortho</i>‐Quinones Explains the Antioxidant Activity of Polydopamine
Hydrogen Atom Transfer from HOO<sup>.</sup> to <i>ortho</i>‐Quinones Explains the Antioxidant Activity of Polydopamine Open
Melanins are stable and non‐toxic biomaterials with a great potential as chemopreventive agents for diseases connected with oxidative stress, but the mechanism of their antioxidant action is unclear. Herein, we show that polydopamine ( PDA…
View article: Hydrogen Atom Transfer from HOO<sup>.</sup> to <i>ortho</i>‐Quinones Explains the Antioxidant Activity of Polydopamine
Hydrogen Atom Transfer from HOO<sup>.</sup> to <i>ortho</i>‐Quinones Explains the Antioxidant Activity of Polydopamine Open
Melanins are stable and non‐toxic biomaterials with a great potential as chemopreventive agents for diseases connected with oxidative stress, but the mechanism of their antioxidant action is unclear. Herein, we show that polydopamine ( PDA…
View article: Excited-State Engineering in Heteroleptic Ionic Iridium(III) Complexes
Excited-State Engineering in Heteroleptic Ionic Iridium(III) Complexes Open
Iridium(III) complexes have assumed a prominent role in the areas of photochemistry and photophysics due to the peculiar properties of both the metal itself and the ligand environment that can be assembled around it. Ir(III) is larger, hea…
View article: Organocatalyzed Michael Addition to Nitroalkenes via Masked Acetaldehyde
Organocatalyzed Michael Addition to Nitroalkenes via Masked Acetaldehyde Open
A novel and safe reaction protocol for the enantioselective enamine-catalysed addition of acetaldehyde to nitroalkenes is presented; this protocol makes use of a safe acetaldehyde precursor to access important intermediates to Active Pharm…