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Nationality : French
Address : 4 Place Jussieu (case 196),
75252 Paris Cedex 05, France
Tel : +33.l.4427.5529
Fax : +33.l.4427.5536
E-Mail : jfr@ccr.jussieu.fr
Professor "class exceptionnelle" at the University Pierre
et Marie Curie (UPMC), Paris, France.
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Brief Analysis of Research Work
Our activity has been devoted mainly to three lines of
research :
I- Study of surface properties of solids with high specific
area.
Solids considered : insulating oxides (silica, alumina,
magnesia, zeolites, supper acid solids), supported metals
(elements of the platinum series, bimetallic catalysts),
sometimes semi conductors (NiO, TiO2)
Structures and textures: Characterization
Chemical properties : determination by chemical procedure,
IR, NMR, ESR, chemisorption, thermodesorption, etc,
II- Study of reaction mechanisms in heterogeneous catalysis
Isolation of intermediate steps, the most important being
the chemisorption of the reactants, by IR and high resolution
NMR.
III- Application of NMR to the study of solids and heterogeneous
systems.
We were the first to show the interest of NMR for studying
the chemisorption and the surface properties of catalysts.
For this reason NMR is particularly developed and used in the
studies which we are carrying out on heterogeneous systems
whether both in rigid and non-rigid lattices. Development of
NMR spectroscopy: Dispersion mode NMR at high RF field,
calculation of real chemical shits in the study of
heterogeneous systems,... Determination of chemical properties
of solids NMR in rigid lattice : Determination of the
heterogeneous equilibrium constants, acidity scale of
solids, etc.
129 Xe-NMR of adsorbed xenon for the study of microporous
solids : We have been the pionner of this technique used to
determine : microporosity, structure defects, short-range
crystallinity, mechanism of synthesis, location of cations
(zeolites) and "encumberling" species, metal dispersion,
diffusion of species, etc.
Scientific results are summarized in :
270 papers, 120 communications, 80 conferences
24 plenary lectures
books : author 7, editor 4
Awards : - French Society of Chemistry 1961
- French Academy of Science 1998
"A growing number of research groups throughout the world
is being attracted by xenon atom properties observed by
nuclear magnetic resonance. Xenon gas can diffuse into
materials, and its study has led to information on free
volume and porosity at the microscopic scale.
Surfaces, interfaces, defects and micro-voids are beginning
to fall within the scope of NMR, and great potential can be
envisaged in applications to zeolitic and porous materials,
polymers, semiconductors and ceramic materials, inclusion
complexes and composites."
Piero SOZZANI
Président du XEMAT
1ier Congrès international
sur la RMN-Xe.
Juin 2000
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