Recherche

Afficher tous les résultats pour

Accueil

Personne

Manuel Alejandro Méndez Agudelo

Cette personne n’est plus à l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (36)

Evaluation of Gibbs Energy of Dioxouranium Transfer at an Electrified Liquid vertical bar Liquid Interface Supported on a Microhole

Hubert Girault, Zhifeng Ding, Manuel Alejandro Méndez Agudelo, Astrid Johana Olaya Avendano, Thomas James Stockmann

Herein is reported the determination of the Gibbs energy of dioxouranium (UO22+) transfer across an interface between two immiscible electrolytic solutions (ITIES), water and 1,2-dichloroethane, that was supported at a 25 mu m diameter microhole, by means ...

2011

Ionic partition diagram of tetraphenylporphyrin at the water|1,2-dichloroethane interface

Hubert Girault, Zdenek Samec, Bin Su, Raheleh Partovi Nia, Manuel Alejandro Méndez Agudelo

diagram of 5,10,15,20-tetraphenyl-21H,23H-porphine (H2TPP) at the water|1,2-dichloroethane interface using a simple Born solvation model. This zone diagram shows under which form this porphyrin is present, i.e. neutral, monoprotonated or diprotonated, and ...

Elsevier2011

Interfacial Photoreduction of Supercritical CO2 by an Aqueous Catalyst

Hubert Girault, Patrick Voyame, Manuel Alejandro Méndez Agudelo

Not just a solvent anymore: CO2 reduction under supercritical conditions was achieved in a biphasic water–supercritical CO2 system using an aqueous soluble catalyst (see picture). The introduction of such an interface provides a suitable reaction medium wh ...

Wiley-VCH Verlag GmbH2011

LEPA: From Proteomics to Energy Conversion

Hubert Girault, Anne-Laure Gassner, Fernando Cortes Salazar, Mohammad Reza Pourhaghighi, Manuel Alejandro Méndez Agudelo, Liang Qiao

This review article summarizes the different fields of research at the Laboratoire d'Electrochimie Physique et Analytique at the Ecole Polytechnique Federale de Lausanne. The research areas covered include charge transfer reactions at soft interfaces, bio- ...

2011

Controlling the specific enrichment of multi-phosphorylated peptides on oxide materials: aluminium foil as a target plate for laser desorption ionization mass spectrometry

Hubert Girault, Mohamad Hojeij, Hongyan Bi, Manuel Alejandro Méndez Agudelo, Liang Qiao

A specific multi-phosphopeptide enrichment method is presented to complement current phosphopeptide isolation strategies that normally bias mass spectrometry analysis towards the detection of mono-phosphopeptides. An adsorption model is developed that show ...

2010

Oxygen reduction by decamethylferrocene at liquid/liquid interfaces catalyzed by dodecylaniline

Hubert Girault, Zdenek Samec, Bin Su, Raheleh Partovi Nia, Manuel Alejandro Méndez Agudelo, Imren Hatay

Molecular oxygen (O2) reduction by decamethylferrocene (DMFc) was investigated at a polarized water/ 1,2-dichloroethane (DCE) interface. Electrochemical results point to a mechanism similar to the EC type reaction at the conventional electrode/solution int ...

Elsevier2010

Formation and study of single metal ion–phospholipid complexes in biphasic electrospray ionization mass spectrometry

Hubert Girault, Michel Prudent, Anne-Clémence Corminboeuf, Manuel Alejandro Méndez Agudelo, Daniel Filipe Dos Santos Alves Jana

Single metal ion-phospholipid complexes are observed in biphasic electrospray ionization mass spectrometry (BESI-MS) using a dual-channel microsprayer. Such a microsprayer makes it possible to put into contact two immiscible liquids within the Taylor cone. ...

Royal Society of Chemistry2010

Voltammetric determination of extreme standard Gibbs ion transfer energy

Hubert Girault, Fernando Cortes Salazar, Manuel Alejandro Méndez Agudelo, Astrid Johana Olaya Avendano

A voltammetric methodology to determine the standard Gibbs energy of transfer of highly hydrophobic and hydrophilic ions has been developed. The electrochemical cell used includes a water|1,2-dichloroethane micro-interface supported on a microhole in a thi ...

Elsevier2010

Dioxygen Reduction by Cobalt(II) Octaethylporphyrin at Liquid / Liquid Interfaces

Hubert Girault, Zdenek Samec, Bin Su, Raheleh Partovi Nia, Manuel Alejandro Méndez Agudelo

Oxygen reduction catalyzed by cobalt(II) (2,3,7,8,12,13,17,18-octaethylporphyrin) [Co(OEP)] at soft interfaces is studied by voltammetry and biphasic reactions. When Co(OEP) is present in a solution of 1,2-dichloroethane in contact with an aqueous acidic s ...

Wiley-Blackwell2010

Oxygen reduction catalyzed by a fluorinated tetraphenylporphyrin free base at liquid/liquid interfaces

Hubert Girault, Zdenek Samec, Bin Su, Anne-Clémence Corminboeuf, Manuel Alejandro Méndez Agudelo, Imren Hatay

The diprotonated form of a fluorinated free base porphyrin, namely 5-(p-aminophenyl)-10,15,20-tris(pentafluorophenyl)porphyrin (H(2)FAP), can catalyze the reduction of oxygen by a weak electron donor, namely ferrocene (Fc). At a water/1,2-dichloroethane in ...

American Chemical Society2010

Oxygen and proton reduction by decamethylferrocene in non-aqueous acidic media

Hubert Girault, Zdenek Samec, Bin Su, Anne-Clémence Corminboeuf, Manuel Alejandro Méndez Agudelo, Imren Hatay, Peiyu Ge

Experimental studies and density functional theory (DFT) computations suggest that oxygen and proton reduction by decamethylferrocene (DMFc) in 1,2-dichloroethane involves protonated DMFc, DMFcH+, as an active intermediate species, producing hydrogen perox ...

Royal Society of Chemistry2010

Voltammetry for surface-active ions at polarisable liquid|liquid interfaces

Hubert Girault, Bin Su, Manuel Alejandro Méndez Agudelo

Adsorption of charged species at the interface between two immiscible electrolyte solutions (ITIES) is simulated taking into account both the mutual influence between the potential dependent surface excess charge and the potential distribution between the ...

2009

Proton-Coupled Oxygen Reduction at Liquid-Liquid Interfaces Catalyzed by Cobalt Porphine

Hubert Girault, Zdenek Samec, Manuel Alejandro Méndez Agudelo, Imren Hatay, Fengping Li

Cobalt porphine (CoP) dissolved in the organic phase of a biphasic system is used to catalyze O2 reduction by an electron donor, ferrocene (Fc). Using voltammetry at the interface between two immiscible electrolyte solutions (ITIES), it is possible to driv ...

2009

About the Electrospray Ionization Source in Mass Spectrometry: Electrochemistry and On-chip Reactions

Hubert Girault, Joël Stéphane Rossier, Michel Prudent, Niels Erik Lion, Christophe Roussel, Bin Su, Manuel Alejandro Méndez Agudelo

The present work shows that the electrochemical properties of electrospray ionization (ESI) can be used to add functions to the process. As example, we show how the choice of the electrode material can be used to study interactions between metal ions and b ...

2009

Biphasic Electrospray Ionization for the Study of Interfacial Complexes

Hubert Girault, Michel Prudent, Manuel Alejandro Méndez Agudelo

Biphasic electrospray ionization (BESI) mass spectrometry is achieved by using a dual-channel microsprayer, where channels filled with different immiscible phases meet at the Taylor cone. Two types of interfacial complexation reactions have been studied: t ...

The Japan Society of Analytical Chemistry / The Japan Society for Analytical Chemistry2008

Peptide-Phospholipid Complex Formation at Liquid-Liquid Interfaces

Hubert Girault, Michel Prudent, Bin Su, Manuel Alejandro Méndez Agudelo

Two peptides known to interact with receptors embedded in cell membranes, angiotensin III (AngIII) and Leuenkephalin(LeuEnk), were studied electrochemically at the interface formed between two immiscible electrolyte solutions modified by an adsorbed monola ...

2008

Page 2 sur 2