Crystal Growth of New Hexahydroxometallates Using a Hydroflux

Author(s)

W. Michael Chance, University of South Carolina - Columbia
Daniel E. Bugaris, University of South Carolina - Columbia
Athena S. Sefat, Oak Ridge National Laboratory, Oak Ridge, Tennessee
Hans-Conrad zur Loye, University of South Carolina - ColumbiaFollow

Document Type

Paper

Subject Area(s)

Chemistry

Abstract

A series of seven compounds, Sr₂Mn(OH)₆, Ba₂Mn(OH)₆, Sr₂Co(OH)₆, Ba₂Co(OH)₆, Sr₂Ni(OH)₆, Ba₂Ni(OH)_6, and Ba₂Cu(OH)₆, were synthesized using a low-melting hydroflux, a hybrid approach between aqueous hydrothermal and molten hydroxide flux techniques. Crystals of the hexahydroxometallates were obtained by dissolving appropriate amounts of alkaline-earth nitrates or hydroxides and transition-metal oxides, acetates, or chlorides in the hydroflux and reacting at 180–230 °C. The isostructural compounds all crystallize in the monoclinic space group P21/n. The monoclinic structure consists of isolated transition-metal octahedra within a three-dimensional framework of corner- and edge-shared eight-coordinate, alkaline-earth polyhedra. Magnetic susceptibility data show that all compounds are simple paramagnets. Thermogravimetric analysis indicates that these hydroxides lose water between 215 and 350 °C and transform into oxide products, the identity of which depends on the metal cations present in the parent hexahydroxometallates.

Digital Object Identifier (DOI)

https://doi.org/10.1021/ic400910g

Publication Info

Published in Inorganic Chemistry, Volume 52, Issue 20, 2013, pages 11723-11733.

Rights

© Inorganic Chemistry 2013, American Chemical Society.

APA Citation

Chance, W., Bugaris, D., Sefat, A., & zur Loye, H.-C. (2013). Crystal Growth of New Hexahydroxometallates Using a Hydroflux. Inorganic Chemistry, 52(20), 11723–11733. https://doi.org/10.1021/ic400910g