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André Merbach

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Ghenadie Novitchi; Annie Powell; Christopher Anson; Lothar Helm; André E Merbach
NMR study of ligand exchange and electron self-exchange between oxo-centered trinuclear clusters [Fe3(μ3-O)(μ-O2CR)6(4-R'py)3](+/0).
Fabrice Riblet; Ghenadie Novitchi; Rosario Scopelliti; Lothar Helm; Aurelian Gulea; André E Merbach
Isomerization mechanisms of stereolabile tris- and bis-bidentate octahedral cobalt(II) complexes: X-ray structure and variable temperature and pressure NMR kinetic investigations.
Ghenadie Novitchi; Fabrice Riblet; Rosario Scopelliti; Lothar Helm; Aurelian Gulea; André E Merbach
Mechanism of pyridine-ligand exchanges at the different labile sites of 3d heterometallic and mixed valence mu3-oxo trinuclear clusters.

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All Publications

2011: Ghenadie Novitchi; Annie Powell; Christopher Anson; Lothar Helm; André E Merbach
NMR study of ligand exchange and electron self-exchange between oxo-centered trinuclear clusters [Fe3(μ3-O)(μ-O2CR)6(4-R'py)3](+/0).
Inorganic chemistry 2011;50(20):10402-16.
2010: Fabrice Riblet; Ghenadie Novitchi; Rosario Scopelliti; Lothar Helm; Aurelian Gulea; André E Merbach
Isomerization mechanisms of stereolabile tris- and bis-bidentate octahedral cobalt(II) complexes: X-ray structure and variable temperature and pressure NMR kinetic investigations.
Inorganic chemistry 2010;49(9):4194-211.
2008: Ghenadie Novitchi; Fabrice Riblet; Rosario Scopelliti; Lothar Helm; Aurelian Gulea; André E Merbach
Mechanism of pyridine-ligand exchanges at the different labile sites of 3d heterometallic and mixed valence mu3-oxo trinuclear clusters.
Inorganic chemistry 2008;47(22):10587-99.
2008: João Bruno Livramento; Lothar Helm; Angélique Sour; Conlin O'Neil; André E Merbach; Eva Tóth
A benzene-core trinuclear GdIII complex: towards the optimization of relaxivity for MRI contrast agent applications at high magnetic field.
Dalton transactions (Cambridge, England : 2003) 2008;(9):1195-202.
2008: Paulo Loureiro de Sousa; João Bruno Livramento; Lothar Helm; André E Merbach; William Même; Bich-Thuy Doan; Jean-Claude Beloeil; M I M Prata; Ana C Santos; Carlos F G C Geraldes; Eva Tóth
In vivo MRI assessment of a novel GdIII-based contrast agent designed for high magnetic field applications.
Contrast media & molecular imaging 2008;3(2):78-85.
2007: Zoltán Jászberényi; Loïck Moriggi; Philipp Schmidt; Claudia Weidensteiner; Rainer Kneuer; André E Merbach; Lothar Helm; Eva Tóth
Physicochemical and MRI characterization of Gd3+-loaded polyamidoamine and hyperbranched dendrimers.
Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry 2007;12(3):406-20.
2007: Meriem Benmelouka; Alain Borel; Loïck Moriggi; Lothar Helm; André E Merbach
Design of Gd(III)-based magnetic resonance imaging contrast agents: static and transient zero-field splitting contributions to the electronic relaxation and their impact on relaxivity.
The journal of physical chemistry. B 2007;111(4):832-40.
2007: Petra Lebdusková; Petr Hermann; Lothar Helm; Eva Tóth; Jan Kotek; Koen Binnemans; Jakub Rudovský; Ivan Lukes; André E Merbach
Gadolinium(III) complexes of mono- and diethyl esters of monophosphonic acid analogue of DOTA as potential MRI contrast agents: solution structures and relaxometric studies.
Dalton transactions (Cambridge, England : 2003) 2007;(4):493-501.
2006: Pascal V Grundler; Lothar Helm; Roger Alberto; André E Merbach
Relevance of the ligand exchange rate and mechanism of fac-[(CO)3M(H2O)3]+ (M = Mn, Tc, Re) complexes for new radiopharmaceuticals.
Inorganic chemistry 2006;45(25):10378-90.
2006: Jérôme Costa; Edina Balogh; Véronique Turcry; Raphaël Tripier; Michel Le Baccon; Françoise Chuburu; Henri Handel; Lothar Helm; Eva Tóth; André E Merbach
Unexpected aggregation of neutral, xylene-cored dinuclear GdIII chelates in aqueous solution.
Chemistry (Weinheim an der Bergstrasse, Germany) 2006;12(26):6841-51.
2006: Petra Lebdusková; Angélique Sour; Lothar Helm; Eva Tóth; Jan Kotek; Ivan Lukes; André E Merbach
Phosphinic derivative of DTPA conjugated to a G5 PAMAM dendrimer: an 17O and 1H relaxation study of its Gd(III) complex.
Dalton transactions (Cambridge, England : 2003) 2006;(28):3399-406.
2006: Meriem Benmelouka; Johan van Tol; Alain Borel; Marc Port; Lothar Helm; Louis-Claude Brunel; André E Merbach
A high-frequency EPR study of frozen solutions of Gd(III) complexes: straightforward determination of the zero-field splitting parameters and simulation of the NMRD profiles.
Journal of the American Chemical Society 2006;128(24):7807-16.
2006: Marie-Line Lehaire; Pascal V Grundler; Stefan Steinhauser; Niklaus Marti; Lothar Helm; Kaspar Hegetschweiler; Roger Schibli; André E Merbach
Water-exchange study revealed unexpected substitution behavior of [(CO)2(NO)Re(H2O)3]2+ in aqueous media.
Inorganic chemistry 2006;45(10):4199-204.
2006: László Burai; Eva Tóth; Hervé Bazin; Meriem Benmelouka; Zoltán Jászberényi; Lothar Helm; André E Merbach
Positively charged GdIII cryptates: slow, associative water exchange.
Dalton transactions (Cambridge, England : 2003) 2006;(4):629-34.
2006: João Bruno Livramento; Angélique Sour; Alain Borel; André E Merbach; Eva Tóth
A starburst-shaped heterometallic compound incorporating six densely packed gd(3+) ions.
Chemistry (Weinheim an der Bergstrasse, Germany) 2006;12(4):989-1003.
2006: Susana Torres; José A Martins; João P André; Carlos F G C Geraldes; André E Merbach; Eva Tóth
Supramolecular assembly of an amphiphilic Gd(III) chelate: tuning the reorientational correlation time and the water exchange rate.
Chemistry (Weinheim an der Bergstrasse, Germany) 2006;12(3):940-8.
2006: João Bruno Livramento; Claudia Weidensteiner; M I M Prata; Peter R Allegrini; Carlos F G C Geraldes; Lothar Helm; R Kneuer; André E Merbach; Ana C Santos; P Schmidt; Eva Tóth
First in vivo MRI assessment of a self-assembled metallostar compound endowed with a remarkable high field relaxivity.
Contrast media & molecular imaging 2006;1(1):30-9.
2005: Zoltán Jászberényi; Angélique Sour; Eva Tóth; Meriem Benmelouka; André E Merbach
Fine-tuning water exchange on Gd(III) poly(amino carboxylates) by modulation of steric crowding.
Dalton transactions (Cambridge, England : 2003) 2005;(16):2713-9.
2005: Balaji Sitharaman; K R Kissell; Keith B Hartman; Lesa A Tran; A Baikalov; Irene Rusakova; Y Sun; Htet A Khant; Steven J Ludtke; Wah Chiu; Sabrina Laus; Eva Tóth; Lothar Helm; André E Merbach; Lon J Wilson
Superparamagnetic gadonanotubes are high-performance MRI contrast agents.
Chemical communications (Cambridge, England) 2005;(31):3915-7.
2005: Sabrina Laus; Balaji Sitharaman; Eva Tóth; Robert D Bolskar; Lothar Helm; Subashini Asokan; Michael S Wong; Lon J Wilson; André E Merbach
Destroying gadofullerene aggregates by salt addition in aqueous solution of Gd@C(60)(OH)(x) and Gd@C(60)[C(COOH(2))](10).
Journal of the American Chemical Society 2005;127(26):9368-9.
2005: Jérôme Costa; Eva Tóth; Lothar Helm; André E Merbach
Dinuclear, bishydrated Gd(III) polyaminocarboxylates with a rigid xylene core display remarkable proton relaxivities.
Inorganic chemistry 2005;44(13):4747-55.
2005: Lothar Helm; André E Merbach
Inorganic and bioinorganic solvent exchange mechanisms.
Chemical reviews 2005;105(6):1923-59.
2005: László Burai; Eva Tóth; Angélique Sour; André E Merbach
Separation and characterization of the two diastereomers for [Gd(DTPA-bz-NH2)(H2O)]2-, a common synthon in macromolecular MRI contrast agents: their water exchange and isomerization kinetics.
Inorganic chemistry 2005;44(10):3561-8.
2005: Sabrina Laus; Angélique Sour; Robert Ruloff; Eva Tóth; André E Merbach
Rotational dynamics account for pH-dependent relaxivities of PAMAM dendrimeric, Gd-based potential MRI contrast agents.
Chemistry (Weinheim an der Bergstrasse, Germany) 2005;11(10):3064-76.
2005: Jérôme Costa; Robert Ruloff; László Burai; Lothar Helm; André E Merbach
Rigid MIIL2Gd2III (M = Fe, Ru) complexes of a terpyridine-based heteroditopic chelate: a class of candidates for MRI contrast agents.
Journal of the American Chemical Society 2005;127(14):5147-57.
2005: Nicholas Chatterton; Christelle Gateau; Marinella Mazzanti; Jacques Pécaut; Alain Borel; Lothar Helm; André E Merbach
The effect of pyridinecarboxylate chelating groups on the stability and electronic relaxation of gadolinium complexes.
Dalton transactions (Cambridge, England : 2003) 2005;(6):1129-35.
2005: João Bruno Livramento; Eva Tóth; Angélique Sour; Alain Borel; André E Merbach; Robert Ruloff
High relaxivity confined to a small molecular space: a metallostar-based, potential MRI contrast agent.
Angewandte Chemie (International ed. in English) 2005;44(10):1480-4.
2005: Z Jaszberényi; Eva Tóth; Tamás Kálai; Róbert Király; László Burai; Ernö Brücher; André E Merbach; Kálmán Hideg
Synthesis and complexation properties of DTPA-N,N''-bis[bis(n-butyl)]-N'-methyl-tris(amide). Kinetic stability and water exchange of its Gd3+ complex.
Dalton transactions (Cambridge, England : 2003) 2005;(4):694-701.
2005: Eva Tóth; Robert D Bolskar; Alain Borel; Gabriel González; Lothar Helm; André E Merbach; Balaji Sitharaman; Lon J Wilson
Water-soluble gadofullerenes: toward high-relaxivity, pH-responsive MRI contrast agents.
Journal of the American Chemical Society 2005;127(2):799-805.
2004: João P André; Carlos F G C Geraldes; José A Martins; André E Merbach; M I M Prata; Ana C Santos; J J Pedroso de Lima; Eva Tóth
Lanthanide(III) complexes of DOTA-glycoconjugates: a potential new class of lectin-mediated medical imaging agents.
Chemistry (Weinheim an der Bergstrasse, Germany) 2004;10(22):5804-16.
2004: Paul V Bernhardt; Fernando Bozoglian; Brendan P Macpherson; Manuel Martínez; André E Merbach; Gabriel González; Beatriz Sienra
Oxidation of mixed-valence Co(III)/Fe(II) complexes reversed at high pH: a kinetico-mechanistic study of water oxidation.
Inorganic chemistry 2004;43(22):7187-95.
2004: Ghenadie Novitchi; Fabrice Riblet; Lothar Helm; Rosario Scopelliti; Aurélian Gulea; André E Merbach
Richness of isomerism in labile octahedral Werner-type cobalt(II) complexes demonstrated by 19F NMR spectroscopy: structure and stability.
Magnetic resonance in chemistry : MRC 2004;42(9):801-6.
2004: Valérie Alezra; Gérald Bernardinelli; Clémence Corminboeuf; Urban Frey; E Peter Kündig; André E Merbach; Christophe Saudan; Florian Viton; Jacques Weber
[CpRu((R)-Binop-F)(H2O)][SbF6], a new fluxional chiral Lewis acid catalyst: synthesis, dynamic nmr, asymmetric catalysis, and theoretical studies.
Journal of the American Chemical Society 2004;126(15):4843-53.
2004: Gaëlle M Nicolle; André E Merbach
Destruction of perfluoroalkyl surfactant aggregates by beta-cyclodextrin.
Chemical communications (Cambridge, England) 2004;(7):854-5.
2004: Robert Ruloff; Gerard van Koten Gv; André E Merbach
Novel heteroditopic chelate for self-assembled gadolinium(III) complex with high relaxivity.
Chemical communications (Cambridge, England) 2004;(7):842-3.
2004: Ulrich Prinz; Ulrich Koelle; Stefan Ulrich; André E Merbach; Oliver Maas; Kaspar Hegetschweiler
The organometallic fac-[(CO)3Mn(H2O)3]+ aquaion: base-hydrolysis and kinetics of H2O-substitution.
Inorganic chemistry 2004;43(7):2387-91.
2004: Pascal V Grundler; Bernadette Salignac; Sonia Cayemittes; Roger Alberto; André E Merbach
Mechanistic changeover for the water substitution on fac-[(CO)3Re(H2O)3]+ revealed by high-pressure NMR.
Inorganic chemistry 2004;43(3):865-73.
2004: David De Vito; Jacques Weber; André E Merbach
Calculated volume and energy profiles for water exchange on t2g6 rhodium(III) and iridium(III) hexaaquaions: conclusive evidence for an Ia mechanism.
Inorganic chemistry 2004;43(3):858-64.
2003: Marlon K Thompson; Mauro Botta; Gaëlle Nicolle; Lothar Helm; Silvio Aime; André E Merbach; Kenneth N Raymond
A highly stable gadolinium complex with a fast, associative mechanism of water exchange.
Journal of the American Chemical Society 2003;125(47):14274-5.
2003: Fabrice Yerly; Alain Borel; Lothar Helm; André E Merbach
MD simulations of acyclic and macrocyclic Gd3+-based MRI contrast agents: influence of the internal mobility on water proton relaxivity.
Chemistry (Weinheim an der Bergstrasse, Germany) 2003;9(22):5468-80.
2003: Gaëlle M Nicolle; Fabrice Yerly; Daniel Imbert; Ulrike Böttger; Jean-Claude Bünzli; André E Merbach
Towards binuclear polyaminocarboxylate MRI contrast agents? Spectroscopic and MD study of the peculiar aqueous behavior of the LnIII chelates of OHEC (Ln=Eu, Gd, and Tb): implications for relaxivity.
Chemistry (Weinheim an der Bergstrasse, Germany) 2003;9(22):5453-67.
2003: László Burai; Eva Tóth; André E Merbach
HPLC separation of diastereomers of Ln(III)-ethylenepropylene-triamine-pentaacetate complexes. Direct assessment of their water exchange rate.
Chemical communications (Cambridge, England) 2003;(21):2680-1.
2003: Sabrina Laus; Robert Ruloff; Eva Tóth; André E Merbach
GdIII complexes with fast water exchange and high thermodynamic stability: potential building blocks for high-relaxivity MRI contrast agents.
Chemistry (Weinheim an der Bergstrasse, Germany) 2003;9(15):3555-66.
2003: Bernadette Salignac; Pascal V Grundler; Sonia Cayemittes; Urban Frey; Rosario Scopelliti; André E Merbach; Roman Hedinger; Kaspar Hegetschweiler; Roger Alberto; Ulrich Prinz; Gerhard Raabe; Ulrich Kölle; Syd Hall
Reactivity of the organometallic fac-[(CO)3ReI(H2O)3]+ aquaion. Kinetic and thermodynamic properties of H2O substitution.
Inorganic chemistry 2003;42(11):3516-26.
2003: László Burai; Eva Tóth; Gilles Moreau; Angélique Sour; Rosario Scopelliti; André E Merbach
Novel macrocyclic EuII complexes: fast water exchange related to an extreme M-O water distance.
Chemistry (Weinheim an der Bergstrasse, Germany) 2003;9(6):1394-404.
2003: Lothar Helm; Eva Tóth; André E Merbach
Lanthanide ions as magnetic resonance imaging agents. Nuclear and electronic relaxation properties. Applications.
Metal ions in biological systems 2003;40():589-641.
2002: Robert Ruloff; Eva Tóth; Rosario Scopelliti; Raphaël Tripier; Henri Handel; André E Merbach
Accelerating water exchange for GdIII chelates by steric compression around the water binding site.
Chemical communications (Cambridge, England) 2002;(22):2630-1.
2002: Gaëlle M Nicolle; Eva Tóth; Klaus-Peter Eisenwiener; Helmut R Mäcke; André E Merbach
From monomers to micelles: investigation of the parameters influencing proton relaxivity.
Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry 2002;7(7-8):757-69.
2002: Maik H Jacob; Christophe Saudan; Georg Holtermann; Andreas Martin; Dieter Perl; André E Merbach; Franz X Schmid
Water contributes actively to the rapid crossing of a protein unfolding barrier.
Journal of molecular biology 2002;318(3):837-45.
2002: Florence J Monlien; Lothar Helm; Amira Abou-Hamdan; André E Merbach
Mechanistic diversity covering 15 orders of magnitude in rates: cyanide exchange on [M(CN)(4)](2-) (M = Ni, Pd, and Pt).
Inorganic chemistry 2002;41(7):1717-27.
2002: Alain Borel; Fabrice Yerly; Lothar Helm; André E Merbach
Multiexponential electronic spin relaxation and Redfield's limit in Gd(III) complexes in solution: consequences for 17O/1H NMR and EPR simultaneous analysis.
Journal of the American Chemical Society 2002;124(9):2042-8.
2002: Gaëlle M Nicolle; Eva Tóth; Heribert Schmitt-Willich; Bernd Radüchel; André E Merbach
The impact of rigidity and water exchange on the relaxivity of a dendritic MRI contrast agent.
Chemistry (Weinheim an der Bergstrasse, Germany) 2002;8(5):1040-8.
2002: Fabrice Yerly; Kenneth I Hardcastle; Lothar Helm; Silvio Aime; Mauro Botta; André E Merbach
Molecular dynamics simulation of [Gd(egta)(H(2)O)](-) in aqueous solution: internal motions of the poly(amino carboxylate) and water ligands, and rotational correlation times.
Chemistry (Weinheim an der Bergstrasse, Germany) 2002;8(5):1031-9.
2002: Frank A Dunand; Alain Borel; André E Merbach
How does internal motion influence the relaxation of the water protons in Ln(III)DOTA-like complexes?
Journal of the American Chemical Society 2002;124(4):710-6.
2001: Yann Bretonnière; Marinella Mazzanti; Jacques Pécaut; Frank A Dunand; André E Merbach
Solid-state and solution properties of the lanthanide complexes of a new heptadentate tripodal ligand: a route to gadolinium complexes with an improved relaxation efficiency.
Inorganic chemistry 2001;40(26):6737-45.
2001: Frank A Dunand; R S Dickins; D Parker; André E Merbach
Towards rational design of fast water-exchanging Gd(dota-like) contrast agents? Importance of the M/m ratio.
Chemistry (Weinheim an der Bergstrasse, Germany) 2001;7(23):5160-7.
2001: Christophe Saudan; Frank A Dunand; A Abou-Hamdan; Philippe Bugnon; P G Lye; S F Lincoln; André E Merbach
A model for sequential threading of alpha-cyclodextrin onto a guest: a complete thermodynamic and kinetic study in water.
Journal of the American Chemical Society 2001;123(42):10290-8.
2001: S Rast; Alain Borel; Lothar Helm; Elie Belorizky; Pascal H Fries; André E Merbach
EPR spectroscopy of MRI-related Gd(III) complexes: simultaneous analysis of multiple frequency and temperature spectra, including static and transient crystal field effects.
Journal of the American Chemical Society 2001;123(11):2637-44.
2001: Frank A Dunand; Eva Tóth; R Hollister; André E Merbach
Lipari-Szabo approach as a tool for the analysis of macromolecular gadolinium(III)-based MRI contrast agents illustrated by the [Gd(EGTA-BA-(CH2)12)]nn+ polymer.
Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry 2001;6(3):247-55.
2001: Alain Borel; Lothar Helm; André E Merbach
Molecular dynamics simulations of MRI-relevant GdIII chelates: direct access to outer-sphere relaxivity.
Chemistry (Weinheim an der Bergstrasse, Germany) 2001;7(3):600-10.
2001: Alfredo Pasquarello; I Petri; P S Salmon; O Parisel; Roberto Car; E Toth; D H Powell; H E Fischer; Lothar Helm; André E Merbach
First solvation shell of the Cu(II) aqua ion: evidence for fivefold coordination.
Science (New York, N.Y.) 2001;291(5505):856-9.
2001: Olimpia Mamula; F J Monlien; A Porquet; G Hopfgartner; André E Merbach; Alexander von Zelewsky
Self-assembly of multinuclear coordination species with chiral bipyridine ligands: silver complexes of 5,6-CHIRAGEN(o,m,p-xylidene) ligands and equilibrium behaviour in solution.
Chemistry (Weinheim an der Bergstrasse, Germany) 2001;7(2):533-9.
2000: D De Vito; H Sidorenkova; F P Rotzinger; Jacques Weber; André E Merbach
Can octahedral t2g6 complexes substitute associatively? The case of the isoelectronic ruthenium(II) and rhodium(III) hexaaquaions.
Inorganic chemistry 2000;39(24):5547-52.
2000: László Burai; Eva Tóth; S Seibig; Rosario Scopelliti; André E Merbach
Solution and solid-state characterization of Eu(II) chelates: a possible route towards redox responsive MRI contrast agents.
Chemistry (Weinheim an der Bergstrasse, Germany) 2000;6(20):3761-70.
2000: R Churlaud; U Frey; F Metz; André E Merbach
Speciation and kinetics related to catalytic carbonylation in the presence of cis-[Ir(CO)2I2]P(C6H5)4 under CO and H2 pressures.
Inorganic chemistry 2000;39(18):4137-42.
2000: U C Meier; Rosario Scopelliti; Euro Solari; André E Merbach
Structure and reactivity of aquacarbonylruthenium(II) complexes. An X-ray and oxygen-17 NMR study.
Inorganic chemistry 2000;39(17):3816-22.
2000: Horst Elias; R Schumacher; J Schwamberger; T Wittekopf; Lothar Helm; André E Merbach; S Ulrich
Kinetics and mechanism of complex formation of nickel(II) with tetra-N-alkylated cyclam in N,N-dimethylformamide (DMF): comparative study on the reactivity and solvent exchange of the species Ni(DMF)6(2+) and Ni(DMF)5Cl+.
Inorganic chemistry 2000;39(8):1721-7.
2000: R Churlaud; U Frey; F Metz; André E Merbach
Mechanism of CO exchange on cis-[M(CO)2X2]- complexes (M=Rh,Ir;X=Cl, Br, or I).
Inorganic chemistry 2000;39(2):304-7.