Concept

Ion hydronium

Publications associées (55)

A Novel Strategy for the Design of 8-Hydroxyquinolinate- Based Lanthanide Bioprobes That Emit in the Near Infrared Range

A new polydentate tripodal ligand T2soxMe was synthesized to take advantage of the chelating effect of tridentate 8- hydroxyquinolinate subunits. Potentiometric and spectrophotometric titrations reveal seven pKa values of between 3.7 and 10.2. In water, th ...

2007

Biphasic catalysis in aqueous and ionic liquid media

Céline Fellay

A review; an overview of recent developments from the Lab. of Organometallic and Medicinal Chem. at the EPFL in biphasic catalysis, involving aq. solns. and ionic liqs., and in CO2 redn. is presented. Progress in the use of ionic liqs., either by catalyst ...

2007

Modelling of aqueous solvation of eosin Y at the rutile TiO2(110)/water interface

Majed Chergui, Frank van Mourik, Erwin Portuondo Campa

Mol. dynamics simulations at 298 K are used to study an aq. dissolved dye (eosin Y) adsorbed at the TiO2(1 1 0) surface to ext. static and dynamic information of solvation. Differences in the phys. behavior of the dye at the surface and in bulk H2O are com ...

2006

Aqueous Solvation Dynamics at Metal Oxide Surfaces

Majed Chergui, Jacques-Edouard Moser, Frank van Mourik, Erwin Portuondo Campa

Broadband transient absorption (TA) spectroscopy, three-pulse photon echo peak shift (3PEPS), and anisotropy decay measurements were used to study the solvation dynamics in bulk water and interfacial water at ZrO2 surfaces, using Eosin Y as a probe. The 3P ...

2006

Positively Charged GdIII Cryptates: Slow, Associative Water Exchange

André Merbach, Lothar Helm, Eva Jakab Toth

A combined variable-temp. and multiple field 17O NMR, EPR and NMRD study was performed for the 1st time on Gd(III) complexes of cryptand ligands, L1 and L2, where L1 contains three 2,2'-bipyridine units ([bpy.bpy.bpy]) and L2 is the disubstituted Me ester ...

2006

Surface reaction mechanism of atomic layer deposition of HfO2 on Ge(100)-2×1: A density functional theory study

Wei Chen, Min Xu, Jie Ren

Density functional theory is employed to investigate atomic layer deposition mechanism of HfO2, on Ge(I 0 0)-2 x I surface. Both the HfCl4 and H2O half-reactions proceed through an analogous trapping-mediated mechanism. The neighboring hydroxyl in the reac ...

Elsevier2006

Initial surface reactions in atomic layer deposition of Al2O3 on the hydroxylated GaAs(001)-4 x 2 surface

Wei Chen, Min Xu

Hybrid density functional theory has been used to investigate the initial surface reaction mechanism in atomic layer deposition (ALD) of Al2O3 on the hydroxylated GaAs(001)-4 x 2 surface. The precursors for ALD of Al2O3' are trimethylaluminium (TMA) and H2 ...

Institute of Physics2005

Molecular dynamics of Gd(III) complexes in aqueous solution by HF EPR

André Merbach, Lothar Helm, Alain Borel

The study of electron spin relaxation in aqueous Gd(III) complexes is the source of new insights into the physics and chemistry of magnetic resonance imaging (MRI) contrast agents. The coupling of the seven unpaired electrons of the Gd(III) ion with the su ...

Plenum Press2004

Structural studies and spectral characteristics of 4-benzoylpyridine thiosemicarbazone and N(4 ')-phenyl-4-benzoylpyridine thiosemicarbazone

Gervais Chapuis

4-benzoylpyridine thiosemicarbazone (H(4)Bz(4)DH) and N(4')-phenyl-4-benzoylpyridine thiosemicarbazone (H4Bz4Ph) were obtained and fully characterized by infrared, UV and NMR spectroscopies. The assignment of the NMR signals was made by using DEPT135 and t ...

2003

The electroreduction of hydrogen on platinum(111) in acidic media

Nicola Marzari, Roberto Car

We propose a new mechanism for the electroreduction of hydrogen in acidic media. The specific model and theoretical calculations are designed for the Pt(111) surface, because this is the only face that exhibits a clear first order phase transition. The bas ...

2002

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