All Outputs (49)

Decorated titania fibers as photocatalysts for hydrogen generation and organic matter degradation (2019)
Journal Article

Heterogenous photocatalysts based on electrospun fibers composed of polyvinylpyrrolidone and titanium propoxide were prepared and heated at 500, 750 and 950 °C to obtain anatase and rutile fibers. The fibers were then decorated with Pd and Co nanopar... Read More about Decorated titania fibers as photocatalysts for hydrogen generation and organic matter degradation.

Cobalt-molybdenum co-catalyst for heterogeneous photocatalytic H-mediated transformations (2019)
Journal Article

Earth abundant materials, Mo and Co, are used to decorate TiO2 and work as co-catalyst for the selective semi-hydrogenation of alkynes and isomerization of estragole in a H2-free environment under UVA irradiation. Catalytic efficiency is higher than... Read More about Cobalt-molybdenum co-catalyst for heterogeneous photocatalytic H-mediated transformations.

Spectroscopic and Time-Dependent DFT Study of the Photophysical Properties of Substituted 1,4-Distyrylbenzenes (2019)
Journal Article

In this contribution, we examine the photophysical properties of 15 totally trans-trans 1,4-distyrylbenzene derivatives (DSBs) functionalized with different electron-donating (ED) and electron-withdrawing (EW) groups by experimental and computational... Read More about Spectroscopic and Time-Dependent DFT Study of the Photophysical Properties of Substituted 1,4-Distyrylbenzenes.

Highly Electrophilic Titania Hole as a Versatile and Efficient Photochemical Free Radical Source (2019)
Journal Article

Photogenerated holes in nanometric semiconductors, such as TiO2, constitute remarkable powerful electrophilic centers, capable of capturing an electron from numerous donors such as ethers, or nonactivated substrates like toluene or acetonitrile, and... Read More about Highly Electrophilic Titania Hole as a Versatile and Efficient Photochemical Free Radical Source.

Hydrophobic silver nanoparticles interacting with phospholipids and stratum corneum mimic membranes in Langmuir monolayers (2019)
Journal Article

The interaction of hydrophobic silver nanoparticles with different phospholipids and stratum corneum mimic (SCM) membranes is studied in Langmuir monolayers. Thus, silver nanoparticles coated with oleic acid (AgNP-OA) were synthesized, characterized... Read More about Hydrophobic silver nanoparticles interacting with phospholipids and stratum corneum mimic membranes in Langmuir monolayers.

Glass wool: a novel support for heterogeneous catalysis (2018)
Journal Article

Heterogeneous catalysis presents significant advantages over homogeneous catalysis such as ease of separation and reuse of the catalyst. Here we show that a very inexpensive, manageable and widely available material – glass wool – can act as a cataly... Read More about Glass wool: a novel support for heterogeneous catalysis.

Biocompatibility and photo-induced antibacterial activity of lignin-stabilized noble metal nanoparticles (2018)
Journal Article

One-pot thermal and photochemical syntheses of lignin-doped silver and gold nanoparticles were developed and their antimicrobial properties were studied against Escherichia coli and Staphylococcus aureus. The nature of the lignin as well as the metal... Read More about Biocompatibility and photo-induced antibacterial activity of lignin-stabilized noble metal nanoparticles.

How Fast Can Thiols Bind to the Gold Nanoparticle Surface? (2018)
Journal Article

Kinetics of gold nanoparticle surface modification with thiols can take more than one hour for completion. 7?mercapto?4?methylcoumarin can be used to follow the process by fluorescence spectroscopy and serves as a convenient molecular probe to determ... Read More about How Fast Can Thiols Bind to the Gold Nanoparticle Surface?.

Remarkable effect of the dithiafulvene structures on their capacity as reducing agents: Influence of conjugated thiocarbonyl group (2018)
Journal Article

The use of dithiafulvene (DTF) derivative compounds having strong electron donating properties as reducing agents to obtain noble metal nanoparticles (PdNP, AgNP, AuNP) is demonstrated. The resulting oxidized DTF product was characterized by spectroe... Read More about Remarkable effect of the dithiafulvene structures on their capacity as reducing agents: Influence of conjugated thiocarbonyl group.

Expanding the Color Space in the Two-Color Heterogeneous Photocatalysis of Ullmann C–C Coupling Reactions (2018)
Journal Article

The Ullmann reaction can be heterogeneously photocatalyzed by UV excitation of Pd@TiO2. While a similar dose of visible light does not initiate the reaction, combination with UV light enhances activity and selectivity toward cross-combination product... Read More about Expanding the Color Space in the Two-Color Heterogeneous Photocatalysis of Ullmann C–C Coupling Reactions.

Photocatalytic Hydrogen Generation Using Metal-Decorated TiO2: Sacrificial Donors vs True Water Splitting (2018)
Journal Article

Selective Photoinduced Antibacterial Activity of Amoxicillin-Coated Gold Nanoparticles: From One-Step Synthesis to in Vivo Cytocompatibility (2018)
Journal Article

Photoinduced antibacterial gold nanoparticles were developed as an alternative for the treatment of antibiotic-resistant bacteria. Thanks to the amoxicillin coating, they possess high in vivo stability, selectivity for the bacteria wall, a good renal... Read More about Selective Photoinduced Antibacterial Activity of Amoxicillin-Coated Gold Nanoparticles: From One-Step Synthesis to in Vivo Cytocompatibility.

Light-Induced Sonogashira C–C Coupling under Mild Conditions Using Supported Palladium Nanoparticles (2018)
Journal Article

The Sonogashira reaction can easily be photocatalyzed by supported palladium nanoparticles. Herein, we demonstrate that the direct excitation of PdNPs can catalyze the C–C coupling between different aryl iodides and acetylenes under very mild conditi... Read More about Light-Induced Sonogashira C–C Coupling under Mild Conditions Using Supported Palladium Nanoparticles.

Click Chemistry: Mechanistic Insights into the Role of Amines Using Single-Molecule Spectroscopy (2017)
Journal Article

Single-molecule spectroscopy is used to gain insights into the click chemistry reaction photocatalyzed by copper. We show that CuxO@Nb2O5 catalysts can act as truly heterogeneous photocatalysts and that the amine plays an important role in the comple... Read More about Click Chemistry: Mechanistic Insights into the Role of Amines Using Single-Molecule Spectroscopy.

Thiol-Stabilized Gold Nanoparticles: New Ways To Displace Thiol Layers Using Yttrium or Lanthanide Chlorides (2017)
Journal Article

We use the aurophilic interactions shown by lanthanides to overcome the sulfur–gold interaction. UV–vis and X-ray photoelectron spectroscopy confirm that yttrium or lanthanide chlorides easily displace sulfur ligands from the surface of thiol-stabili... Read More about Thiol-Stabilized Gold Nanoparticles: New Ways To Displace Thiol Layers Using Yttrium or Lanthanide Chlorides.

Visible Light Production of Hydrogen by Ablated Graphene: Water Splitting or Carbon Gasification? (2017)
Journal Article

Reduced graphene oxide modified by pulsed laser ablation causes water splitting under visible light illumination (532 nm). When the light source is a pulsed laser, water splitting is accompanied by carbon gasification (CO formation); however, convent... Read More about Visible Light Production of Hydrogen by Ablated Graphene: Water Splitting or Carbon Gasification?.

Photophysics of 7-mercapto-4-methylcoumarin and derivatives: complementary fluorescence behaviour to 7-hydroxycoumarins (2017)
Journal Article

The photophysical behaviour of 7-mercapto-4-methylcoumarin (C-SH) and derivatives has been studied in different solvents. In contrast to 7-hydroxy-4-methylcoumarin, C-SH shows poor emission, but high fluorescence when the thiol is alkylated. The orig... Read More about Photophysics of 7-mercapto-4-methylcoumarin and derivatives: complementary fluorescence behaviour to 7-hydroxycoumarins.

Is Single-Molecule Fluorescence Spectroscopy Ready To Join the Organic Chemistry Toolkit? A Test Case Involving Click Chemistry (2017)
Journal Article

Single molecule spectroscopy (SMS) has matured to a point where it can be used as a convenient tool to guide organic synthesis and drug discovery, particularly applicable to catalytic systems where questions related to homogeneous vs heterogeneous pa... Read More about Is Single-Molecule Fluorescence Spectroscopy Ready To Join the Organic Chemistry Toolkit? A Test Case Involving Click Chemistry.

Tunable Photocatalytic Activity of Palladium-Decorated TiO2: Non-Hydrogen-Mediated Hydrogenation or Isomerization of Benzyl-Substituted Alkenes (2016)
Journal Article

Palladium-decorated TiO2 is a moisture- and air-tolerant versatile catalyst. Its photocatalytic activity can be tuned in favor of hydrogenation or isomerization of benzyl-substituted alkenes simply by changing the irradiation wavelength. Benzyl-subst... Read More about Tunable Photocatalytic Activity of Palladium-Decorated TiO2: Non-Hydrogen-Mediated Hydrogenation or Isomerization of Benzyl-Substituted Alkenes.

From the molecule to the mole: improving heterogeneous copper catalyzed click chemistry using single molecule spectroscopy (2016)
Journal Article

Single molecule spectroscopy (SMS) inspired the optimization of a heterogeneous ‘click’ catalyst leading to enhanced yields of the Cu-catalyzed reaction of azides with terminal alkynes. Changes in SMS data after optimization confirm the improvements... Read More about From the molecule to the mole: improving heterogeneous copper catalyzed click chemistry using single molecule spectroscopy.