A5040513530- Oxidative Organic Chemistry Reactions
- Advanced Cellulose Research Studies
- Hydrogels: synthesis, properties, applications
- Catalytic C–H Functionalization Methods
- Microfluidic and Capillary Electrophoresis Applications
- Advanced NMR Techniques and Applications
- Chemical Synthesis and Reactions
- Drug Solubulity and Delivery Systems
- Vanadium and Halogenation Chemistry
- Advanced Drug Delivery Systems
- Radical Photochemical Reactions
- Nanomaterials for catalytic reactions
- Electrospun Nanofibers in Biomedical Applications
- TiO2 Photocatalysis and Solar Cells
- Lanthanide and Transition Metal Complexes
- Synthesis and Catalytic Reactions
- Nanoparticle-Based Drug Delivery
- Surfactants and Colloidal Systems
- Electron Spin Resonance Studies
- Aerogels and thermal insulation
- Sulfur-Based Synthesis Techniques
- NMR spectroscopy and applications
- Polysaccharides and Plant Cell Walls
- Advanced Photocatalysis Techniques
- Solid-state spectroscopy and crystallography
Politecnico di Milano
2014-2025
Università degli Studi eCampus
2015-2025
National Interuniversity Consortium of Materials Science and Technology
2013-2023
Mylan (Switzerland)
2015-2018
Curculio Institute
2018
Milano University Press
2015-2017
Vinci (United Kingdom)
2017
Università degli Studi Internazionali di Roma
2015-2016
Mylan (South Africa)
2014-2016
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2015
Abstract Adsorbent sponges for water remediation were prepared using TEMPO‐oxidized cellulose nanofibers (TOCNFs) as three‐dimensional scaffolds, and branched polyethyleneimine (bPEI, 25 KDa) the cross‐linking agent. TOCNFs suspended in aqueous solution presence of variable amounts bPEI. The mixtures first freeze‐dried then thermally treated (from 60 to 102 °C over 10 h) promoting formation amide bonds between carboxylic groups TOCNF primary amines resulting materials, which characterized by...
Ibuprofen sodium salt (IP) was encapsulated in cyclodextrin nanosponges (CDNS) obtained by cross-linking of β-cyclodextrin with ethylenediaminetetraacetic acid dianhydride (EDTAn) two different preparations: CDNSEDTA 1:4 and 1:8, where the 1: n notation indicates CD to EDTAn molar ratio. The entrapment IP achieved swelling polymers a 0.27 M solution D 2 O, leading colourless, homogeneous hydrogels loaded IP. molecular environment transport properties were studied high resolution magic angle...
Abstract BACKGROUND In spite of its efficiency and versatility, examples the use N ‐hydroxyphthalimide (NHPI) as catalyst for oxidations at industrial scale are scant, mainly due to lack methodologies recovery reuse catalyst. This paper reports a step by investigation aerobic oxidation cumene (CU), in order verify usability NHPI catalysis processes . RESULTS CU is oxidized corresponding cumyl hydroperoxide (CHP) 70°C presence polar co‐solvent 1% with good conversion (>30%) almost complete...
Abstract All‐organic porous sponges were obtained throughout the direct and solvent‐free (oven 105 °C, time>6 h) crosslinking of TEMPO‐oxidized cellulose nanofibers (TOCNF) with 25 kDa branched polyethyleneimine (bPEI) in presence different amounts citric acid (CA) as co‐crosslinker. The chemical mechanical stability these materials was provided by formation amide bonds between carboxylic moieties TOCNF CA primary amines bPEI. properties investigated under static dynamic loads both dry...
Stable hydrogels with tunable rheological properties were prepared by adding Ca
Abstract A metal‐free catalytic system consisting of an aldehyde and N ‐hydroxyphthalimide (NHPI) for the selective oxidation tertiary alkylaromatics with molecular oxygen has been developed. Cumene was oxidized efficiently to corresponding hydroperoxide under mild conditions. The molecule‐induced homolysis between peracids generated in situ NHPI ensured formation phthalimide ‐oxyl (PINO) radical even at room temperature. Investigations on aldehyde, solvent temperature effects allowed us...
Bioinspired aerogel functionalization by surface modification and coating is in high demand for biomedical technological applications. In this paper, we report an expedient three-step entry to all-natural surface-functionalized nanostructured aerogels based on (a) TEMPO/NaClO promoted synthesis of cellulose nanofibers (TOCNF); (b) freeze-drying preparation; (c) with a eumelanin thin film ammonia-induced solid state polymerization (AISSP) 5,6-dihydroxyindole (DHI) or...
Pectin has found extensive interest in biomedical applications, including wound dressing, drug delivery, and cancer targeting. However, the low viscosity of pectin solutions hinders their applications 3D bioprinting. Here, we developed multicomponent bioinks prepared by combining with TEMPO-oxidized cellulose nanofibers (TOCNFs) to optimize inks' printability while ensuring stability printed hydrogels simultaneously print viable cell-laden inks. First, screened several combinations (1%,...
4,4'-(4,4'-Isopropylidenediphenoxy)bis(N-hydroxyphthalimide), which is a new lipophilic analogue of N-hydroxyphthalimide, can act as an effective catalyst in the aerobic oxidation alkylaromatics under reduced amounts polar cosolvent. The was selected on basis in-depth study influence that substituents aromatic ring N-hydroxyphthalimide exert determining NO-H bond dissociation energy (BDE). BDE values for range model molecules are calculated by DFT and measured EPR spectroscopy. be...
The vibrational dynamics of a new class cross‐linked polymers obtained from both native and modified cyclodextrin, referred to as cyclodextrin nanosponges, is here investigated. main purpose spot the structure these materials at molecular level unlikely be characterized by diffraction methods due low or null degree crystallinity. analysis spectral features bands observed between 1650 1800 cm −1 in Raman infrared spectra, assigned carbonyl stretching modes polymeric network, performed using...
Abstract We report the aerobic photoactivation of N ‐hydroxyphthlimide (NHPI) to phthalimido‐ ‐oxyl (PINO) radical mediated by naphthalene monoimides (NI) for promoting selective oxidation alkylaromatics and allylic compounds corresponding hydroperoxides. In absence either NI or NHPI no was observed, meaning that two molecules operate in a synergistic way. Sunlight as well artificial UV‐light irradiation necessary order perform process at low temperature (30–35 °C). EPR spectroscopy...
A new hyper-branched water-soluble polymer was synthesized by reacting β-cyclodextrin with pyromellitic dianhydride beyond the critical conditions that allow phenomenon of gelation to occur. The molar ratio between monomers is a crucial parameter rules process. Nevertheless, concentration in solvent phase plays key role as well. Hyper-branched β-cyclodextrin-based polymers were obtained performing syntheses excess and cross-linking agent, for dilution determined experimentally. very high...
The phase transition from gel to liquid suspension in cyclodextrin (CD)-based hydrogels is depth monitored by using Fourier transform infrared spectroscopy attenuated total reflectance geometry. Cyclodextrin nanosponges (CDNS) synthesized polymerization of CD with the cross-linking agent ethylenediaminetetraacetic dianhydride at different agent/CD molar ratios have been left evolve into upon gradual increase hydration level. Measurements changes occurring vibrational dynamics system during...