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Your search keyword '"Dunand, Frank A."' showing total 4 results
Start Over Author "Dunand, Frank A." Topic chemistry
4 results on '"Dunand, Frank A."'

1. 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

Author

Bretonniere, Yann, Mazzanti, Marinella, Pecaut, Jacues, Dunand, Frank A., and Merbach, Andre E.

Subjects
Chemistry, Inorganic -- Research, Solid state chemistry -- Research, Solution (Chemistry) -- Physiological aspects, Ligands -- Physiological aspects, Rare earth metals -- Physiological aspects, Coordination compounds -- Physiological aspects, Gadolinium -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the lanthanide complexes of the tripodal ligands. The structure and solution properties of these complexes and the relaxivity properties of the gadolinium tripodal ligand complexes have been investigated and the results are discussed.

Published
2001

2. A model for sequential threading of alpha-cyclodextrin onto a guest: a complete thermodynamic and kinetic study in water

Author

Saudan, Christophe, Dunand, Frank A., Abou-Hamdan, Amira, Bugnon, Pascal, Lye, Peter G., Lincoln, Stephen F., and Merbach, Andre E.

Subjects
Conformational analysis -- Methods, Cyclodextrins -- Structure, Thermodynamics -- Analysis, Chemistry
Abstract

The first variable-temperature and variable-pressure stopped-flow spectrophotometric study of the sequential threading of alpha-cyclodextrin (alpha-CD) onto the guest dye Mordant Orange 10, S, is described. The quantitative ground-state and activation enthalpy, entropy and volume change studies indicate that hydrational, van der Waals, and conformational changes in S and alpha-CD determine the equilibrium and kinetic character of the system.

Published
2001

3. First (super17)O NMR observation of coordinated water on both isomers of (Eu(DOTAM)(H20)(super3+)): A direct access to water exchange and its role in the isomerization

Author

Dunand, Frank A., Aime, Silvio, and Merbach, Andre E.

Subjects
Magnetic resonance imaging -- Usage, Water transfer -- Research, Chemistry
Abstract

(Eu(DOTAM)(H20)(super3+)) was studied to determine the mechanism of the water exchange from variable temperature and pressure (super1)H and (super17) 0 NMR data.

Published
2000

4. How does internal motion influence the relaxation of the water protons in Ln(super 111)DOTA-like complexes?

Author

Dunand, Frank A., Borel, Alain, and Merbach, Andre E.

Subjects
Chelating agents -- Research, Chemical reactions -- Research, Protons -- Atomic properties, Chemistry
Abstract

The influence of internal motion on the relaxation of the water protons in Ln(super 111)DOTA-like complexes is detailed. The bound water internal motion also affects macromolecular complexes, but when the final effect when combined with the local motion of the chelating group should be generally less than what is observed for the monomeric species.

Published
2002

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