Search

Your search keyword '"Sadun, Claudia"' showing total 132 results
Start Over Author "Sadun, Claudia"
132 results on '"Sadun, Claudia"'

2. Tautomerism in liquid 1,2,3-triazole: a combined Energy-Dispersive X-Ray Diffraction, Molecular Dynamics and FTIR study

Author

Bellagamba, Marco, Bencivenni, Luigi, Gontrani, Lorenzo, Guidoni, Leonardo, and Sadun, Claudia

Subjects
Physics - Chemical Physics, Condensed Matter - Soft Condensed Matter
Abstract

In this work, we report a multitechnique (energy-dispersive X-Ray diffraction, computational methods and FT-IR spectroscopy) study of the tautomeric equilibrium of 1,2,3-triazole, one of the few small nitrogen-containing eterocycles liquid at room temperature. The T-2H form (C2v symmetry) is found to be strongly favored in gas and solid phases, whereas the neat liquid gives diffraction patterns that can be interpreted satisfactorily with the structure functions calculated from some molecular dynamics results for both T-2H and T-1H tautomers, although the T-2H form gives a slightly better agreement.

Published
2013
Full Text
View/download PDF

8. Structural analysis of the solid amorphous binuclear complexes of iron(III) and aluminum(III) with chromium(III)-DTPA chelator using energy dispersive X-ray diffraction

Author

Sadun, Claudia, Bucci, Remo, and Magri, Antonio L.

Subjects
Magnetic resonance imaging -- Research, Chromium compounds -- Optical properties, Aluminum compounds -- Optical properties, Iron compounds -- Optical properties, Chemistry
Abstract

The study focuses on structural data obtained for two amorphous binuclear complexes of iron(III) and aluminum(III) with chromium(III)-diethylentriamineepentaacetic acid (chromium(III)-DTPA, CrL(super 2-) using the energy-dispersive X-ray diffraction technique. X-ray analysis is especially suitable for providing information as to how the metal ions interact with their surroundings.

Published
2002

9. Preparation and structural characterization of polymer-supported methylrhenium trioxide systems as efficient and selective catalysts for the epoxidation of olefins

Author

Saladino, Raffaele, Neri, Veronica, Pelliccia, Anna Rita, Caminiti, Ruggero, and Sadun, Claudia

Subjects
Chemistry, Organic -- Research, Polymers -- Physiological aspects, Rhenium -- Physiological aspects, Methylation -- Physiological aspects, Olefins -- Physiological aspects, Epoxy compounds -- Physiological aspects, Catalysts -- Physiological aspects, Biological sciences, Chemistry
Abstract

Research has been conducted on the methylrhenium trioxide heterogeneous compounds. The preparation of these compounds with poly(4-vinylpyridine) and polystyrene has been carried out and the results of the wide-angle X-ray diffraction analysis have demonstrated distorted octahedral conformation on the primary coordination sphere of the metal.

Published
2002

13. Dimeric osmium phthalocyanine organized in discrete columnarly stacked assemblies: structure, magnetism, and electrical conductivity properties

Author

Caminiti, Ruggero, Donzello, Maria Pia, Ercolani, Claudio, and Sadun, Claudia

Subjects
Osmium -- Research, Amorphous substances -- Magnetic properties, Electrical conductivity -- Analysis, Magnetism -- Analysis, X-rays -- Scattering, Chemistry
Abstract

The wide-angle X-ray scattering technique was successfully used to examine the structure of solid pure osmium phthalocyanine. The solid amorphous material consists of dimeric units (PcOs)2 linked by a direct Os-Os double bond and stacked in columns to form couples of discrete assemblies of formula ((PcOs)2)n. (PcOs)2 is the first example of an Os(II)-Os(II) dimer subjected to a combined structural and magnetic study. Results also affirm that both ruthenium and osmium phthalocyanine could also be dimeric.

Published
1998

19. Supramolecular organization of toluidine blue dye in solid amorphous bases

Author

Matassa, Roberto, Sadun, Claudia, D'Hario, Lucio, Martinelli, Andrea, and Caminiti, Ruggero

Subjects
Organic dyes -- Structure, Organic dyes -- Optical properties, Thiazides -- Structure, Thiazides -- Chemical properties, Chemical synthesis -- Analysis, X-rays -- Diffraction, X-rays -- Observations, Chemicals, plastics and rubber industries
Abstract

The energy dispersive X-ray diffraction technique is employed to study the structure and the supramolecular organization of the toluidine blue (TB) dye in the solid amorphous bases. These dye molecules are shown to undergo self-aggregation and form helical conformations.

Published
2007

20. Structural characterization of ultrasmall superparamagnetic iron oxide (USPIO) particles in aqueous suspension by energy dispersive X-ray diffraction (EDXD)

Author

Di Marco, Mariagrazia, Couvreur, Patrick, Port, Marc, Dubernet, Catherine, and Ballirano, Paolo; Sadun, Claudia

Subjects
Ferric oxide -- Structure, Ferric oxide -- Electric properties, X-rays -- Diffraction, X-rays -- Analysis, Chemistry
Abstract

Ultrasmall sperparamagnetic iron oxide (USPIO) particles are structurally characterized in situ in an aqueous dilute suspension by energy dispersive X-ray diffraction (EDXD) and ex situ as powders obtained by lyphilization of the suspension by angular dispersive X-ray diffraction (ADXD) at 20 degree Celsius. The results have indicated that the structural order, specific to crystal, is not extended to the entire volume of the particle.

Published
2006

Catalog

Books, media, physical & digital resources
See catalog results