List of works - Liane Marcia Rossi

A green route for the synthesis of a bitter-taste dipeptide combining biocatalysis, heterogeneous metal catalysis and magnetic nanoparticles

scholarly article in RSC Advances, vol. 5 no. 46, 2015

A magnetically recoverable scavenger for palladium based on thiol-modified magnetite nanoparticles

A recoverable Pd nanocatalyst for selective semi-hydrogenation of alkynes: hydrogenation of benzyl-propargylamines as a challenging model

A recyclable hybrid manganese(III) porphyrin magnetic catalyst for selective olefin epoxidation using molecular oxygen

A single-step procedure for the preparation of palladium nanoparticles and a phosphine-functionalized support as catalyst for Suzuki cross-coupling reactions

Accessing Frustrated Lewis Pair Chemistry through Robust Gold@N-Doped Carbon for Selective Hydrogenation of Alkynes

Advances in Base-Free Oxidation of Bio-Based Compounds on Supported Gold Catalysts

Aerobic oxidation of monoterpenic alcohols catalyzed by ruthenium hydroxide supported on silica-coated magnetic nanoparticles

Bioinspired-Metalloporphyrin Magnetic Nanocomposite as a Reusable Catalyst for Synthesis of Diastereomeric (-)-Isopulegol Epoxide: Anticancer Activity Against Human Osteosarcoma Cells (MG-63)

scientific article published on 24 December 2018

Biologically Inspired and Magnetically Recoverable Copper Porphyrinic Catalysts: A Greener Approach for Oxidation of Hydrocarbons with Molecular Oxygen

scientific article published on 12 February 2016

Catalyst Recovery and Recycling Facilitated by Magnetic Separation: Iridium and Other Metal Nanoparticles

scholarly article by Marcos J. Jacinto et al published 1 March 2012 in ChemCatChem

Catalytic abatement of CO over highly stable Pt supported on Ta2O5 nanotubes

Catalytic hydrodechlorination of chlorobenzene over supported palladium catalyst in buffered medium

Catalytic oxidation of cinnamyl alcohol using Au-Ag nanotubes investigated by surface-enhanced Raman spectroscopy

scientific article

Catecholase activity of a series of dicopper(II) complexes with variable Cu-OH(phenol) moieties

scientific article

Characterization of poly-{trans-[RuCl2(vpy)4 ]-styrene-4-vinylpyridine} impregnated with silver nanoparticles in non aqueous medium

Clean preparation of methyl esters in one-step oxidative esterification of primary alcohols catalyzed by supported gold nanoparticles

article by Rafael L. Oliveira et al published 2009 in Green Chemistry

Clean protocol for deoxygenation of epoxides to alkenes via catalytic hydrogenation using gold

Comparing Thermal-Cracking and Catalytic Hydrocracking in the Presence of Rh and Ru Catalysts to Produce Liquid Hydrocarbons from Vegetable Oils

Controlling Reaction Selectivity over Hybrid Plasmonic Nanocatalysts

article

Copper nanoparticles synthesized by thermal decomposition in liquid phase: the influence of capping ligands on the synthesis and bactericidal activity

Cost-efficient method for unsymmetrical meso-aryl porphyrins and iron oxide-porphyrin hybrids prepared thereof

scientific article

Cover Feature: Structure and activity of supported bimetallic NiPd nanoparticles: influence of preparation method on CO 2 reduction (ChemCatChem 11/2020)

scientific article published on 5 June 2020

Crystal structure, spectral and magnetic properties of a new (μ-acetate) (μ-alkoxide) dicopper (II) complex as a model for tyrosinase

Design of a Dinuclear Nickel(II) Bioinspired Hydrolase to Bind Covalently to Silica Surfaces: Synthesis, Magnetism, and Reactivity Studies

scientific article published on 15 May 2012

Determination of Metal Loading in Heterogeneous Catalyst by Slurry Sampling Flame Atomic Absorption Spectrometry

Direct Access to Oxidation-Resistant Nickel Catalysts through an Organometallic Precursor

scholarly article by Natália J. S. Costa et al published 26 April 2012 in ACS Catalysis

Easy Access to Metallic Copper Nanoparticles with High Activity and Stability for CO Oxidation

scientific article

Economically attractive route for the preparation of high quality magnetic nanoparticles by the thermal decomposition of iron(III) acetylacetonate

scientific article published on 13 February 2017

Effect of lipid coating on the interaction between silica nanoparticles and membranes

scientific article published in March 2014

Electro-oxidation of methanol in alkaline conditions using Pd–Ni nanoparticles prepared from organometallic precursors and supported on carbon vulcan

article by A. Manzo-Robledo et al published December 2015 in Journal of Nanoparticle Research

Enhanced Energy Storage of Fe 3 O 4 Nanoparticles Embedded in N‐Doped Graphene

scientific article published on 16 March 2020

Enhancement of hematoporphyrin IX potential for photodynamic therapy by entrapment in silica nanospheres

scientific article published on 19 July 2011

Facile recycling approach for waste minimization of silica-coated magnetite nanoparticles synthesis

Fluorescent silica nanospheres for digital counting bioassay of the breast cancer marker HER2/neu [correction of HER2/nue].

scientific article

Glucose oxidase-magnetite nanoparticle bioconjugate for glucose sensing

scientific article published on 22 September 2004

Gold Catalysis for Selective Hydrogenation of Aldehydes and Valorization of Bio‑Based Chemical Building Blocks

Gold nanoparticles supported on magnesium ferrite and magnesium oxide for the selective oxidation of benzyl alcohol

scholarly article by Edmilson M. de Moura et al published 2015 in RSC Advances

Gold-amine cooperative catalysis for reductions and reductive aminations using formic acid as hydrogen source

scientific article published in June 2020

Gold–Ligand-Catalyzed Selective Hydrogenation of Alkynes into cis-Alkenes via H2 Heterolytic Activation by Frustrated Lewis Pairs

Green Synthesis and Applications of Magnetic Nanoparticles

Heat generation in agglomerated ferrite nanoparticles in an alternating magnetic field

Heterodinuclear Fe(III)Zn(II)-bioinspired complex supported on 3-aminopropyl silica. Efficient hydrolysis of phosphate diester bonds

scientific article published in March 2010

High performance gold nanorods and silver nanocubes in surface-enhanced Raman spectroscopy of pesticides

scientific article published on 29 July 2009

High performance magnetic separation of gold nanoparticles for catalyticoxidation of alcohols

article published in 2010

Hybrid Metalloporphyrin Magnetic Nanoparticles as Catalysts for Sequential Transformation of Alkenes and CO2 into Cyclic Carbonates

Hydrolytic activity of a dinuclear copper(II,II) complex in phosphate diester and DNA cleavage

In-field Mössbauer characterization of MFe2O4(M = Fe, Co, Ni) nanoparticles

Influence of Support Basic Sites in Green Oxidation of Biobased Substrates Using Au-Promoted Catalysts

Inorganic Chemistry in Latin America

scholarly article by Ivan Castillo et al published 7 January 2021 in European Journal of Inorganic Chemistry

Insights into the active surface species formed on Ta2O5 nanotubes in the catalytic oxidation of CO.

scientific article published on 17 February 2014

Ion dependence of magnetic anisotropy in MFe2O4 (MFe, Co, Mn) nanoparticles synthesized by high-temperature reaction

Ionic liquids as recycling solvents for the synthesis of magnetic nanoparticles

scientific article published on 05 July 2011

Ligand-assisted preparation of palladium supported nanoparticles: a step toward size control.

scientific article published in June 2009

Magnetic Fluids Based on γ-Fe2O3and CoFe2O4Nanoparticles Dispersed in Ionic Liquids

Magnetic Hyperthermia With Fe$_{3}$O$_{4}$ Nanoparticles: The Influence of Particle Size on Energy Absorption

Magnetic Ionic Liquids Produced by the Dispersion of Magnetic Nanoparticles in 1-n-Butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (BMI.NTf2)

scientific article published on 24 September 2012

Magnetic Nanoparticles: general discussion ⬇️

Magnetic nanocatalysts: supported metal nanoparticles for catalytic applications

Magnetic nanomaterials in catalysis: advanced catalysts for magnetic separation and beyond

Magnetic properties of Fe3O4 nanoparticles coated with oleic and dodecanoic acids

Magnetically recoverable AuPd nanoparticles prepared by a coordination capture method as a reusable catalyst for green oxidation of benzyl alcohol

Magnetically recoverable copper oxide catalysts for aerobic allylic oxidation of cyclohexene

Methylene blue-containing silica-coated magnetic particles: a potential magnetic carrier for photodynamic therapy

scientific article

Moving from surfactant-stabilized aqueous rhodium (0) colloidal suspension to heterogeneous magnetite-supported rhodium nanocatalysts: Synthesis, characterization and catalytic performance in hydrogenation reactions

scholarly article by Carl-Hugo Pélisson et al published March 2012 in Catalysis Today

Nanocatalysts for the Suzuki Coupling Reactions

Nanocomposite particles containing semiconductor and magnetic nanocrystals: fabrication and characterization

Nanoparticle platform to modulate reaction mechanism of phenothiazine photosensitizers.

scientific article published in May 2010

On the Stabilization of Gold Nanoparticles over Silica-Based Magnetic Supports Modified with Organosilanes

scientific article published on 24 February 2011

On the catalytic hydrogenation of polycyclic aromatic hydrocarbons into less toxic compounds by a facile recoverable catalyst

article

One-pot organometallic synthesis of alumina-embedded Pd nanoparticles

scientific article published on 11 October 2017

Optical nanoparticles: general discussion ⬇️

Optimizing Active Sites for High CO Selectivity during CO2 Hydrogenation over Supported Nickel Catalysts

scientific article published on 4 March 2021

Organometallic Preparation of Ni, Pd, and NiPd Nanoparticles for the Design of Supported Nanocatalysts

Oxidation of benzyl alcohol catalyzed by gold nanoparticles under alkaline conditions: weak vs. strong bases

scholarly article in RSC Advances, vol. 6 no. 30, 2016

Palladium on magnetite: magnetically recoverable catalyst for selective hydrogenation of acetylenic to olefinic compounds

Piperazine-promoted gold-catalyzed hydrogenation: the influence of capping ligands

scientific article published in 2020

Polymer versus phosphine stabilized Rh nanoparticles as components of supported catalysts: implication in the hydrogenation of cyclohexene model molecule.

scientific article published on 21 October 2016

Preparation and Characterization of the Novels Terpolymers of Poly-{trans-[RuCl2(vpy)4]-styrene-divinylbenzene} and Styrene-divinylbenzene-vinylpiridine impregnated with Silver Nanoparticles

Preparation of recoverable Ru catalysts for liquid-phase oxidation and hydrogenation reactions

Preparation of supported Pt(0) nanoparticles as efficient recyclable catalysts for hydrogenation of alkenes and ketones

Process Optimization for a Sustainable and Selective Conversion of Fumaric Acid into γ-Butyrolactone Over Pd-Re/SiO2

scientific article published on 3 November 2020

Protoporphyrin IX nanoparticle carrier: preparation, optical properties, and singlet oxygen generation

scientific article published on 4 October 2008

Reaction Pathway Dependence in Plasmonic Catalysis: Hydrogenation as a Model Molecular Transformation.

scientific article published on 24 January 2018

Recent advances in the development of magnetically recoverable metal nanoparticle catalysts

article

Recoverable rhodium nanoparticles: Synthesis, characterization and catalytic performance in hydrogenation reactions

Resonance Raman and crystallographic studies on the complex [Fe2(bbpnol)2]·2DMF (bbpnol=N,N′-bis(2-hydroxybenzyl)-2-ol-1,3-propanediamine)

Restructuring of Gold‐Palladium Alloyed Nanoparticles: A Step towards More Active Catalysts for Oxidation of Alcohols

article by Tiago A. G. Silva et al published 27 June 2019 in ChemCatChem

Reusable Heterogeneous Tungstophosphoric Acid-Derived Catalyst for Green Esterification of Carboxylic Acids

Rhodium Nanoparticles as Precursors for the Preparation of an Efficient and Recyclable Hydroformylation Catalyst

Ruthenium nanoparticles prepared from ruthenium dioxide precursor: Highly active catalyst for hydrogenation of arenes under mild conditions

scholarly article by Liane Marcia Rossi & Giovanna Machado published February 2009 in Journal of Molecular Catalysis A

Screening of Soluble Rhodium Nanoparticles as Precursor for Highly Active Hydrogenation Catalysts: The Effect of the Stabilizing Agents

Selective Allylic oxidation of Cyclohexene by a Magnetically Recoverable Cobalt Oxide Catalyst

scholarly article by Fernanda P. Silva et al published 14 December 2010 in Catalysis Letters

Selective hydrogenation of CO 2 into CO on a highly dispersed nickel catalyst obtained by magnetron sputtering deposition: A step towards liquid fuels

Selective oxidation of glucose to glucuronic acid by cesium-promoted gold nanoparticle catalyst

Sensing of 2,4-dichlorophenoxyacetic acid by surface-enhanced Raman scattering

Separation technology meets green chemistry: development of magnetically recoverable catalyst supports containing silica, ceria, and titania

Size dependence of the magnetic relaxation and specific power absorption in iron oxide nanoparticles

Structural control of gold nanoparticles self-assemblies by layer-by-layer process

article

Structure and activity of supported bimetallic NiPd nanoparticles: influence of preparation method on CO 2 reduction

scientific article published in April 2020

Study of the influence of PPh 3 used as capping ligand or as reaction modifier for hydroformylation reaction involving Rh NPs as precatalyst

Stöber synthesis of monodispersed luminescent silica nanoparticles for bioanalytical assays

scientific article published in May 2005

Superparamagnetic nanoparticle-supported palladium: a highly stable magnetically recoverable and reusable catalyst for hydrogenation reactions

Support Functionalization with a Phosphine-Containing Hyperbranched Polymer: A Strategy to Enhance Phosphine Grafting and Metal Loading in a Hydroformylation Catalyst

Surface composition and structural changes on titanium oxide-supported AuPd nanoparticles during CO oxidation

article

Surface effects in the magnetic properties of crystalline 3 nm ferrite nanoparticles chemically synthesized

Synergic Effect of Copper and Palladium for Selective Hydrogenation of Alkynes

scientific article published on 19 November 2018

Synthesis of supported metal nanoparticle catalysts using ligand assisted methods

scientific article published on 23 August 2012

Synthesis, Structure, Physicochemical Properties and Catecholase-like Activity of a New Dicopper(II) Complex

Synthesis, properties, and application in peptide chemistry of a magnetically separable and reusable biocatalyst

article published in 2014

Synthesis, structure and properties of a new unsymmetric tetranuclear mixed-valence vanadium(IV/V) complex containing distinct V2O33+ cores

Synthesis, structure and properties of the first dinuclear copper(II) complex as a structural model for the phenolic intermediate in tyrosinase–cresolase activity

Synthesis, structure and properties of unsymmetrical μ-alkoxo-dicopper(II) complexes: biological relevance to phosphodiester and DNA cleavage and cytotoxic activity

Taking advantage of a terpyridine ligand for the deposition of Pd nanoparticles onto a magnetic material for selective hydrogenation reactions

Temperature-Driven Restructuring of Silver on AuAg Porous Nanotubes: Impact on CO Oxidation

The influence of 1,2-alkanediol on the crystallinity of magnetite nanoparticles

The partial hydrogenation of benzene to cyclohexene by nanoscale ruthenium catalysts in imidazolium ionic liquids

scientific article

The role and fate of capping ligands in colloidally prepared metal nanoparticle catalysts

scientific article published on 01 May 2018

Third-order nonlinearity of nickel oxide nanoparticles in toluene.

scientific article

Tracking iron oxide nanoparticles in plant organs using magnetic measurements

article

Tuning the Catalytic Activity and Selectivity of Pd Nanoparticles Using Ligand-Modified Supports and Surfaces

scientific article published on 20 September 2017

Volcano-like behavior of Au-Pd core-shell nanoparticles in the selective oxidation of alcohols

scientific article published on 21 July 2014

List of works by Liane Marcia Rossi

A green route for the synthesis of a bitter-taste dipeptide combining biocatalysis, heterogeneous metal catalysis and magnetic nanoparticles

A magnetically recoverable scavenger for palladium based on thiol-modified magnetite nanoparticles

A recoverable Pd nanocatalyst for selective semi-hydrogenation of alkynes: hydrogenation of benzyl-propargylamines as a challenging model

A recyclable hybrid manganese(III) porphyrin magnetic catalyst for selective olefin epoxidation using molecular oxygen

A single-step procedure for the preparation of palladium nanoparticles and a phosphine-functionalized support as catalyst for Suzuki cross-coupling reactions

Accessing Frustrated Lewis Pair Chemistry through Robust Gold@N-Doped Carbon for Selective Hydrogenation of Alkynes

Advances in Base-Free Oxidation of Bio-Based Compounds on Supported Gold Catalysts

Aerobic oxidation of monoterpenic alcohols catalyzed by ruthenium hydroxide supported on silica-coated magnetic nanoparticles

Bioinspired-Metalloporphyrin Magnetic Nanocomposite as a Reusable Catalyst for Synthesis of Diastereomeric (-)-Isopulegol Epoxide: Anticancer Activity Against Human Osteosarcoma Cells (MG-63)

Biologically Inspired and Magnetically Recoverable Copper Porphyrinic Catalysts: A Greener Approach for Oxidation of Hydrocarbons with Molecular Oxygen

Catalyst Recovery and Recycling Facilitated by Magnetic Separation: Iridium and Other Metal Nanoparticles

Catalytic abatement of CO over highly stable Pt supported on Ta2O5 nanotubes

Catalytic hydrodechlorination of chlorobenzene over supported palladium catalyst in buffered medium

Catalytic oxidation of cinnamyl alcohol using Au-Ag nanotubes investigated by surface-enhanced Raman spectroscopy

Catecholase activity of a series of dicopper(II) complexes with variable Cu-OH(phenol) moieties

Characterization of poly-{trans-[RuCl2(vpy)4 ]-styrene-4-vinylpyridine} impregnated with silver nanoparticles in non aqueous medium

Clean preparation of methyl esters in one-step oxidative esterification of primary alcohols catalyzed by supported gold nanoparticles

Clean protocol for deoxygenation of epoxides to alkenes via catalytic hydrogenation using gold

Comparing Thermal-Cracking and Catalytic Hydrocracking in the Presence of Rh and Ru Catalysts to Produce Liquid Hydrocarbons from Vegetable Oils

Controlling Reaction Selectivity over Hybrid Plasmonic Nanocatalysts

Copper nanoparticles synthesized by thermal decomposition in liquid phase: the influence of capping ligands on the synthesis and bactericidal activity

Cost-efficient method for unsymmetrical meso-aryl porphyrins and iron oxide-porphyrin hybrids prepared thereof

Cover Feature: Structure and activity of supported bimetallic NiPd nanoparticles: influence of preparation method on CO 2 reduction (ChemCatChem 11/2020)

Crystal structure, spectral and magnetic properties of a new (μ-acetate) (μ-alkoxide) dicopper (II) complex as a model for tyrosinase

Design of a Dinuclear Nickel(II) Bioinspired Hydrolase to Bind Covalently to Silica Surfaces: Synthesis, Magnetism, and Reactivity Studies

Determination of Metal Loading in Heterogeneous Catalyst by Slurry Sampling Flame Atomic Absorption Spectrometry

Direct Access to Oxidation-Resistant Nickel Catalysts through an Organometallic Precursor

Easy Access to Metallic Copper Nanoparticles with High Activity and Stability for CO Oxidation

Economically attractive route for the preparation of high quality magnetic nanoparticles by the thermal decomposition of iron(III) acetylacetonate

Effect of lipid coating on the interaction between silica nanoparticles and membranes

Electro-oxidation of methanol in alkaline conditions using Pd–Ni nanoparticles prepared from organometallic precursors and supported on carbon vulcan

Enhanced Energy Storage of Fe 3 O 4 Nanoparticles Embedded in N‐Doped Graphene

Enhancement of hematoporphyrin IX potential for photodynamic therapy by entrapment in silica nanospheres

Facile recycling approach for waste minimization of silica-coated magnetite nanoparticles synthesis

Fluorescent silica nanospheres for digital counting bioassay of the breast cancer marker HER2/neu [correction of HER2/nue].

Glucose oxidase-magnetite nanoparticle bioconjugate for glucose sensing

Gold Catalysis for Selective Hydrogenation of Aldehydes and Valorization of Bio‑Based Chemical Building Blocks

Gold nanoparticles supported on magnesium ferrite and magnesium oxide for the selective oxidation of benzyl alcohol

Gold-amine cooperative catalysis for reductions and reductive aminations using formic acid as hydrogen source

Gold–Ligand-Catalyzed Selective Hydrogenation of Alkynes into cis-Alkenes via H2 Heterolytic Activation by Frustrated Lewis Pairs

Green Synthesis and Applications of Magnetic Nanoparticles

Heat generation in agglomerated ferrite nanoparticles in an alternating magnetic field

Heterodinuclear Fe(III)Zn(II)-bioinspired complex supported on 3-aminopropyl silica. Efficient hydrolysis of phosphate diester bonds

High performance gold nanorods and silver nanocubes in surface-enhanced Raman spectroscopy of pesticides

High performance magnetic separation of gold nanoparticles for catalyticoxidation of alcohols

Hybrid Metalloporphyrin Magnetic Nanoparticles as Catalysts for Sequential Transformation of Alkenes and CO2 into Cyclic Carbonates

Hydrolytic activity of a dinuclear copper(II,II) complex in phosphate diester and DNA cleavage

In-field Mössbauer characterization of MFe2O4(M = Fe, Co, Ni) nanoparticles

Influence of Support Basic Sites in Green Oxidation of Biobased Substrates Using Au-Promoted Catalysts

Inorganic Chemistry in Latin America

Insights into the active surface species formed on Ta2O5 nanotubes in the catalytic oxidation of CO.

Ion dependence of magnetic anisotropy in MFe2O4 (MFe, Co, Mn) nanoparticles synthesized by high-temperature reaction

Ionic liquids as recycling solvents for the synthesis of magnetic nanoparticles

Ligand-assisted preparation of palladium supported nanoparticles: a step toward size control.

Magnetic Fluids Based on γ-Fe2O3and CoFe2O4Nanoparticles Dispersed in Ionic Liquids

Magnetic Hyperthermia With Fe$_{3}$O$_{4}$ Nanoparticles: The Influence of Particle Size on Energy Absorption

Magnetic Ionic Liquids Produced by the Dispersion of Magnetic Nanoparticles in 1-n-Butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (BMI.NTf2)

Magnetic Nanoparticles: general discussion ⬇️

Magnetic nanocatalysts: supported metal nanoparticles for catalytic applications

Magnetic nanomaterials in catalysis: advanced catalysts for magnetic separation and beyond

Magnetic properties of Fe3O4 nanoparticles coated with oleic and dodecanoic acids

Magnetically recoverable AuPd nanoparticles prepared by a coordination capture method as a reusable catalyst for green oxidation of benzyl alcohol

Magnetically recoverable copper oxide catalysts for aerobic allylic oxidation of cyclohexene

Methylene blue-containing silica-coated magnetic particles: a potential magnetic carrier for photodynamic therapy

Moving from surfactant-stabilized aqueous rhodium (0) colloidal suspension to heterogeneous magnetite-supported rhodium nanocatalysts: Synthesis, characterization and catalytic performance in hydrogenation reactions

Nanocatalysts for the Suzuki Coupling Reactions

Nanocomposite particles containing semiconductor and magnetic nanocrystals: fabrication and characterization

Nanoparticle platform to modulate reaction mechanism of phenothiazine photosensitizers.

On the Stabilization of Gold Nanoparticles over Silica-Based Magnetic Supports Modified with Organosilanes

On the catalytic hydrogenation of polycyclic aromatic hydrocarbons into less toxic compounds by a facile recoverable catalyst

One-pot organometallic synthesis of alumina-embedded Pd nanoparticles

Optical nanoparticles: general discussion ⬇️

Optimizing Active Sites for High CO Selectivity during CO2 Hydrogenation over Supported Nickel Catalysts

Organometallic Preparation of Ni, Pd, and NiPd Nanoparticles for the Design of Supported Nanocatalysts

Oxidation of benzyl alcohol catalyzed by gold nanoparticles under alkaline conditions: weak vs. strong bases

Palladium on magnetite: magnetically recoverable catalyst for selective hydrogenation of acetylenic to olefinic compounds

Piperazine-promoted gold-catalyzed hydrogenation: the influence of capping ligands

Polymer versus phosphine stabilized Rh nanoparticles as components of supported catalysts: implication in the hydrogenation of cyclohexene model molecule.

Preparation and Characterization of the Novels Terpolymers of Poly-{trans-[RuCl2(vpy)4]-styrene-divinylbenzene} and Styrene-divinylbenzene-vinylpiridine impregnated with Silver Nanoparticles