Concept

Groupe 5 du tableau périodique

Publications associées (109)

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The versatile chemistry and non-centrosymmetric crystal structures of salt-inclusion vanadate hybrids

Wendy Lee Queen

Three unique structure types of the vanadate-based mixed-metal oxide systems (salt)·MnII-Vv-O and (salt)·CuII-Vv-O are presented, with a focus on the role of the asym. vanadate units. Lattice parameters were obtained for (CsCl)2Mn(VO3)2, (CsBr)2Mn(VO3)2, ( ...

2008

Multiphysics and Energetic Modeling of a Vanadium Redox Flow Battery

Alfred Rufer, Christian Blanc

Vanadium redox flow batteries (VRB) are large stationary electricity storage systems; their performance is enhanced when they are operating under optimal conditions. The multiphysics model developed in this paper offers a good understanding of the VRB oper ...

2008

A numerical model for the description of the lamellar and massive phase transformations in Ti-Al-Nb alloys

Alain Jacot, Amin Rostamian

A phenomenological modelling approach has been developed for the description of die massive and lamellar microstructures which form in gamma-TiAl alloys at high and moderate cooling rates, respectively. The nucleation of both massive and lamellar gamma is ...

Minerals, Metals & Materials Soc, 184 Thorn Hill Rd, Warrendale, Pa 15086-7514 Usa2008

Low strain sensitivity of the dielectric property of pyrochlore Bi-Zn-Nb-O films

Thermal strain sensitivity of the dielectric property was investigated for (111)-textured polycrystalline Bi-Zn-Nb-O films. Cubic pyrochlore films with similar crystallinity and the degree of the orientation were obtained on various substrates, and their 1 ...

2008

Dinitrogen dissociation on an isolated surface tantalum atom

David Lyndon Emsley

Both industrial and biochemical ammonia syntheses are thought to rely on the cooperation of multiple metals in breaking the strong triple bond of dinitrogen. Such multimetallic cooperation for dinitrogen cleavage is also the general rule for dinitrogen red ...

AMER ASSOC ADVANCEMENT SCIENCE2007

Benefiting from the Unique Properties of Lanthanide Ions

The recent upsurge of interest in contrast agents for magnetic resonance imaging, of luminescent chemosensors for medical diagnostic, and lately, for optical imaging of cells has generated an impressive momentum for the coordination and supramolecular chem ...

2006

A Spirocyclic P-S Cage Cation: Synthesis and Formation of P7S6I2+

Upon ionization of the P4S3I2 molecule with Ag[Al(OR)4], a highly reactive sulfonium cation P4S3I+ is generated (NMR simulated and assigned). At -80 °C this cation reacts with additional P4S3I2 to give either an iodophosphonium P4S3I3+ cation (NMR simulate ...

2006

Electrode and chemical reactions during electrodeposition of tantalum products in CsCl melt

Alla Arakcheeva

This work was accomplished in the context of systematic examination of a role played by electrolyte cation composition in electroreduction processes. The electrochemical behaviour of molten salts systems where CsCl was used as solvent for potassium and cae ...

2006

Electronic structure and exchange interactions of Na2V3O7

Frédéric Mila

We have performed first-principle calculations of the electronic structure and exchange couplings for the nanotube compound Na2V3O7 using the local-density approximation Hubbard parameter U approach. Our results show that while the intraring exchange inter ...

2006

The chemistry of phosphinoamides and related compounds

Paul Joseph Dyson, Zhaofu Fei

This review commences with a survey of the general synthetic routes leading to aminophosphines containing the P-NH subgroup. Recent examples involving functionalised and chiral aminophosphines are included. The synthesis and structural properties of deprot ...

2005