Room-temperature synthesis of a new stable (N 2 H 4 )WO 3 compound: a route for hydrazine trapping

Fabien Giovannelli (1) , Catherine Mathieu (1) , K. Fritsch (2) , Karim Adil (3, 4) , F. Goutenoire (4) , K. Habicht (2) , Fabian Delorme (1)

1 GREMAN - UMR 7347 - GREMAN (matériaux, microélectronique, acoustique et nanotechnologies)
2 HZB - Helmholtz-Zentrum Berlin für Materialien und Energie GmbH = Helmholtz Centre Berlin for Materials and Energy = Centre Helmholtz de Berlin pour les matériaux et l'énergie
3 KAUST - King Abdullah University of Science and Technology [Saudi Arabia]
4 IMMM - Institut des Molécules et Matériaux du Mans

A new (N2H4)WO3 compound has been obtained by mixing WO3 and aqueous hydrazine solution at room temperature for 24 h. The reaction is catalyzed by the presence of lithium. X-ray, synchrotron and neutron diffraction techniques have shown that the material crystallizes in trigonal space group P3221 (No. 154). Chains of distorted WO4 tetrahedra extend along the a axis of the unit cell, linked by a corner-sharing oxygen atom: the N2H4 are in the voids between them. The thermal characterization shows that this new compound is stable up to 220°C, greatly beyond the boiling point of N2H4 (114°C); thus making it a promising candidate for catalysis or trapping applications.

Mots clés: hybrid compound; tungsten oxide; hydrazine trapping.

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Cristallographie; Chimie inorganique; Supraconductivité [cond-mat.supr-con]; Electrons fortement corrélés [cond-mat.str-el]; Matériaux

Fabien Giovannelli, Catherine Mathieu, K. Fritsch, Karim Adil, F. Goutenoire, et al.. Room-temperature synthesis of a new stable (N 2 H 4 )WO 3 compound: a route for hydrazine trapping. Acta Crystallographica Section B : Structural Science, Crystal Engineering and Materials [2014-..], 2019, 75 (2), pp.127-133. ⟨10.1107/S2052520619000064⟩. ⟨hal-02087407⟩