| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Parac-Vogt, T. N.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (40/40 displayed)
- 2014Enantioselective assembly of a ruthenium(II) polypyridyl complex into a double helixcitations
- 2012A new metallostar complex based on an aluminum(iii) 8-hydroxyquinoline core as a potential bimodal contrast agentcitations
- 2012A self-assembled complex with a Titanium(IV) catecholate core as a potential bimodal contrast agentcitations
- 2012Tetranuclear d-f metallostars: Synthesis, relaxometric, and luminescent propertiescitations
- 2011A heterobimetallic ruthenium-gadolinium complex as a potential agent for bimodal imagingcitations
- 2011Nitrile-functionalized pyridinium, pyrrolidinium, and piperidinium ionic liquidscitations
- 2011A modular approach towards the synthesis of target-specific MRI contrast agentscitations
- 2009(Tetracycline)europium(III) complex as luminescent probe for hydrogen peroxide detectioncitations
- 2009Ceric ammonium nitrate (CAN) as oxidizing or nitrating reagent for organic reactions in ionic liquidscitations
- 2009Temperature-driven mixing-demixing behavior of binary mixtures of the ionic liquid choline bis(trifluoromethylsulfonyl)imide and watercitations
- 2008Lanthanide-surfactant-combined catalysts for the allylation of benzaldehyde with tetraallyltin in aqueous solutionscitations
- 2008Carboxyl-functionalized task-specific ionic liquids for solubilizing metal oxidescitations
- 2008Copper(II) 15-metallacrown-5 lanthanide(III) complexes derived from l-serine and l-threonine hydroxamic acidscitations
- 2007Near-infrared photoluminescence of lanthanide complexes containing the hemicyanine chromophorecitations
- 2007Bis(phenylethylamide) derivatives of Gd-DTPA as potential receptor-specific MRI contrast agentscitations
- 2007Lanthanide(III) nitrobenzenesulfonates and p-toluenesulfonate complexes of lanthanide(III), iron(III), and copper(II) as novel catalysts for the formation of calix[4]resorcinarenecitations
- 2006Paramagnetic liposomes containing amphiphilic bisamide derivatives of Gd-DTPA with aromatic side chain groups as possible contrast agents for magnetic resonance imagingcitations
- 2006Mandelohydroxamic acid as ligand for copper(II) 15-metallacrown-5 lanthanide(III) and copper(II) 15-metallacrown-5 uranyl complexescitations
- 2006Dinuclear lanthanide Schiff-base complexes forming a rectangular columnar mesophasecitations
- 2006Pharmacokinetic and in vivo evaluation of a self-assembled gadolinium(III)-iron(II) contrast agent with high relaxivity.citations
- 2005Lanthanide(III) tosylates as new acylation catalystscitations
- 2005Synthesis, characterization, and pharmacokinetic evaluation of a potential MRI contrast agent containing two paramagnetic centers with albumin binding affinitycitations
- 2005Lanthanide(III)-induced conversion of 12-metallacrown-4 to 5-metallacrown-5 complexes in solutioncitations
- 2005Design of high coordination number metallomesogens by decoupling of the complex-forming and mesogenic groups: Nematic and lamello-columnar mesophasescitations
- 2005Relaxometric study of copper [15]metallacrown-5 gadolinium complexes derived from α-aminohydroxamic acidscitations
- 2005Spectroscopic properties of neodymium(III)-containing polyoxometalates in aqueous solutioncitations
- 2005Pentacopper(II) complexes of α-aminohydroxamic acids: Uranyl-induced conversion of a 12-metallacrown-4 to a 15-metallacrown-5citations
- 2004Lanthanide(III) nitrobenzenesulfonates as new nitration catalysts: The role of the metal and of the counterion in the catalytic efficiencycitations
- 2004Heterobimetallic gadolinium(III)-iron(III) complex of DTPA-bis(3- hydroxytyramide)citations
- 2004Gadolinium DTPA-monoamide complexes incorporated into mixed micelles as possible MRI contrast agentscitations
- 2004Rare-earth quinolinates: Infrared-emitting molecular materials with a rich structural chemistrycitations
- 2004Lanthanide(III) nosylates as new nitration catalystscitations
- 2004Lanthanide(III) complexes of aromatic sulfonic acids as catalysts for the nitration of toluenecitations
- 2003Potential MRI contrast agents based on micellar incorporation of amphiphilic bis(alkylamide) derivatives of [(Gd-DTPA)(H<inf>2</inf>O)] <sup>2-</sup>
- 2003Erratum: Liquid-crystalline azines formed by the rare-earth promoted decomposition of hydrazide "habbe" ligands: Structural and thermal properties (Journal of Materials Chemistry (2003) 13 (1639-1645))
- 2003Liquid-crystalline azines formed by the rare-earth promoted decomposition of hydrazide "habbe" ligands: Structural and thermal propertiescitations
- 2003Adducts of Schiff bases with tris(β-diketonato)lanthanide(III) complexes: Structure and liquid-crystalline behaviour
- 2002Nature of equilibrium shifts in racemic praseodymium(III) tris(2,2′-oxydiacetate) induced by interaction with chiral probes
- 2002Mesomorphism of lanthanide-containing Schiff's base complexes with chloride counterionscitations
- 2001Absolute configuration assignment of D<inf>3</inf>-symmetric lanthanide complexes based on circular dichroism induced by interaction with a chiral probe
Places of action
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article
Lanthanide(III) nitrobenzenesulfonates as new nitration catalysts: The role of the metal and of the counterion in the catalytic efficiency
Abstract
Lanthanide(III) complexes of p-nitrobenzenesulfonic acid, Ln(p-NBSA)(3), m-nitrobenzenesulfonic acid, Ln(m-NBSA)(3), and 2,4-nitrobenzenesulfonic acid, Ln(2,4-NBSA)(3), were prepared, characterized and examined as catalyst for the nitration of benzene, toluene, xylenes, naphthalene, bromobenzene and chlorobenzene. The initial screening of the catalysts showed that lanthanum(III) complexes were more effective than the corresponding ytterbium(III) complexes, and that catalysts containing the bulky 2,4-NBSA ligand were less effective than the catalyst containing p-NBSA (nosylate) or m-NBSA ligands. Examination of a series of Ln(p-NBSA)(3) and Ln(m-NBSA)(3) catalysts revealed that there is a clear correlation between the ionic radii of the lanthanide(III) ions and the yields of nitration, with the lighter lanthanides being more effective. The X-ray single crystal structure of Yb(m-NBSA)(3).6H(2)O shows that two m-NBSA ligands are directly bound to the metal centre while the third ligand is not located in the first coordination sphere, but it is hydrogen bonded to one of the water molecules which is coordinated to ytterbium(III). NMR studies suggest that this structure is preserved under the conditions used in the nitration reaction. The structure of Yb(m-NBSA)(3) is markedly different from the structure of the well-known ytterbium(III) triflate catalyst. The coordination of the nitrobenzenesulfonate counterion to the lanthanide(III) ion suggests that steric effects might play an important role in determining the efficiency of these novel nitration catalysts. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004).