A one-pot green method to synthesise Pt and Pd nanoparticles is reported. Two natural aromatic polymers, lignin fulvic acid, were used as both reducing stabilising agents at moderate temperature (80 °C) in water under aerobic conditions. Full characterisation was performed using TEM, UV-vis, XRD, 195Pt 1H NMR, FT-IR GC-MS techniques. In the TEM images, we observed spherical of diameters range 16 nm 20 nm, case Pd, smaller ones not so well defined shapes for Pt. organic fractions formed...

The continuous monitoring of soil water content is commonly carried out using low-frequency capacitance sensors that require a site-specific calibration to relate sensor readings apparent dielectric bulk permittivity (Kb) and (θ). In fine-textured soils, the conversion Kb θ still challenging due temperature effects on bound fraction associated with clay mineral surfaces, which disregarded in factory calibrations. Here, multi-point approach accounts for two soils medium high content. A...

One-pot combinations of sequential catalytic reactions can offer practical and ecological advantages over classical multi-step synthesis schemes. In this context, the integration enzymatic chemo-catalytic transformations holds particular potential for efficient selective reaction sequences that would not be possible using either method alone. Here, we report one-pot combination alcohol dehydrogenase-catalysed asymmetric reduction 2-azido ketones Pd nanoparticle-catalysed hydrogenation...

Nowadays, the chemical industry is looking for sustainable chemicals to synthesize nanocomposite bio-based polyurethane foams, PUs, with aim replace conventional petrochemical precursors. Some possibilities increase environmental sustainability in synthesis of PUs include use and additives derived from renewable sources (such as vegetable oils or biomass wastes), which comprise increasingly wider base raw materials. Generally, exhibit chemico-physical, mechanical functional properties, are...

Abstract Polystyrene‐supported 9‐amino‐9‐deoxy‐ epi ‐quinine was synthesized through co‐polymerization of an ad hoc ‐designed chiral monomer with divinylbenzene, in the presence azobis(isobutyronitile) (AIBN) as radical initiator and toluene 1‐dodecanol porogenic solvents. The heterogenized catalyst efficiently promoted reaction isobutyric aldehyde β‐nitrostyrene, very high yield enantioselectivity, comparable or even higher than that homogeneous counterpart (up to 95% ee ). recyclability...

The development of effective photocatalysts for environmental applications is still a critical aspect green chemistry. This study explores copper oxide (CuxO) catalysts supported on titanium dioxide (TiO2) and zinc (ZnO) the photocatalytic reduction maleic acid to succinic under ultraviolet (UV) light in water. main goal was evaluate performance CuO/ZnO compared CuO/TiO2 photoreduction. In order improve efficiency first catalyst, an environmentally friendly synthesis, assisted by...

Continuous flow processes have recently emerged as a powerful technology for performing chemical transformations since they ensure some advantages over traditional batch procedures. In this work, the use of commercially available and affordable PEEK (Polyetheretherketone) PTFE (Polytetrafluoroethylene) HPLC (High Performance Liquid Chromatography) tubing microreactors was exploited to perform organic reactions under continuous conditions, an alternative commercial glass microreactors. The...

Abstract 9‐Amino‐9‐deoxy‐ epi ‐quinine, properly modified by suitable linkers, was anchored on highly cross‐linked polystyrene, poly(ethylene glycol), and silica. The resulting species were characterized NMR spectroscopy tested as supported organocatalysts in the reaction between isobutyric aldehyde trans ‐β‐nitrostyrene. Polystyrene‐ glycol)‐supported catalysts outperformed their nonsupported counterpart affording desired product high yield ee (>90 % ). Silica‐supported proved to be less...

The last decade has witnessed a huge growth in the use of flow chemistry as wellestablished procedure for performing chemical transformations; indeed, under continuous conditions, more sustainable, safer and easier scalable processes could be developed with respect to conventional batch procedures. Organocatalysis recently become an effective methodology stereoselective reactions continuo: metal-free catalytic ensure high levels enantioselectivity avoiding contamination final products...

Abstract Silica nanoparticles of different morphological properties were functionalized with enantiomerically pure imidazolidinones, through immobilization techniques; stainless‐steel columns then loaded silica bearing chiral organocatalysts to realize “homemade” reactors. The influence the material and procedures on chemical stereochemical activities HPLC was studied by performing organocatalyzed DielsAlder reactions between cyclopentadiene α,β‐unsaturated aldehydes under continuous‐flow...

Hydrogenations of allyl alcohols in aqueous media, at room temperature and pressure, were performed presence Pd or Pt lignin nanoparticles as catalysts to obtain saturated alcohols.

A new easy protocol to functionalize the middle layer of commercial surgical face masks (FMs) with Zn and Cu oxides is proposed in order obtain antibacterial personal protective equipment. Zinc copper were synthesized embedded a polydopamine (PDA) shell as potential agents; they analyzed by XRD TEM, revealing, all cases, formation metal oxide nanoparticles (NPs). PDA natural polymer appreciated for its simple rapid synthesis, biocompatibility, high functionalization; it used this work an...

Cellulose Nanocrystals, CNC, opportunely functionalized are proposed as reactive fillers in bio-based flexible polyurethane foams to improve, mainly, their mechanical properties. To overcome the cellulose hydrophilicity, CNC was on its surface by linking covalently a suitable polyol obtain grafted-CNC. The polyols grafted with will react isocyanate preparation of foams. An attractive way introduce functionalities surfaces aqueous media is silane chemistry using functional trialkoxy silanes,...

The combination of metal nanoparticles (Pd or Pt NPs) with NAD-dependent thermostable alcohol dehydrogenase (TADH) resulted in the one-flask catalytic double reduction 3-methyl-2-cyclohexenone to 3-(1S,3S)-methylcyclohexanol. In this article, some assumptions about interactions between a chemocatalyst and biocatalyst have been proposed. It was demonstrated that size NPs critical parameter for mutual inhibition: bigger NPs, more harmful enzyme they were, even if themselves were only...

Abstract Glycerol (GL) represents a widespread agro‐industrial waste. Its valorization is pivotal for sustainable society because GL renewable compound deriving from biomass, but it has high oxygen to carbon ratio, compared with feedstock used in the energy and chemistry sectors. Oxygen‐poor derivatives are easily immediately transferable industry, avoiding deep pressing modification of plants. From this perspective, keeping content an reduction, we could effectively obtain enhancement...

Renewal in the world production of plastics with growing amounts building blocks from biomass is a pressing demand among society. Adipic acid one monomers nylon 6,6, and, traditionally, obtained fossil sources, but it possible to reduce muconic acids, deriving biomass, obtain adipic acid. However, these catalyzed reactions use commonly hazardous conditions or reagents; this study, pathway bio-adipic acid, following Green Chemistry, reported. Metal nanoparticles (M NPs; M = Pd, Pt, Ru, Rh)...

Nowadays, the chemical industry is looking for sustainable chemicals to synthesize nanocomposite bio-based polyurethane foams, PUs, with aim replace conventional petrochemical precursors. Some possibilities increase environmental sustainability in synthesis of PUs include use and additives derived from renewable sources (such as vegetable oils or biomass wastes) which comprise an increasing wider base raw materials. Generally, exhibit chemico-physical, mechanical functional properties are...

The continuous monitoring of soil water content is increasingly carried out using low-cost capacitance sensors that require a site-specific calibration to correlate sensor readings apparent dielectric bulk permittivity (Kb) and (θ). Factory calibrations do not take into account the temperature effects on bound fraction associated with clay mineral surfaces, making it challenging convert Kb θ especially in fine-textured soils. Here, we present new multi-point approach...

Abstract The general applicability and the recyclability of novel heterogeneous catalyst are demonstrated by batch reactions between carbonyl compounds nitroolefins.

Six different platinum nanoparticles and six palladium are prepared screened as catalysts for the hydrogenation of allylic alcohols.

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Abstract A simple HPLC column filled with silica‐supported MacMillian catalyst works as a catalytic reactor for the Diels—Alder reaction between cyclopentadiene and cinnamic aldehyde affording cycloadducts in high yields enantioselectivities.