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Synthesis and Characterization of Copper Hydroxide Acetate With a Layered Discoid Crystal

Published online by Cambridge University Press:  03 March 2011

Naofumi Kozai ,
Hisayoshi Mitamura ,
Hiroyasu Fukuyama ,
Fumitaka Esaka  and
Sridhar Komarneni
Naofumi Kozai
Affiliation:
Department of Environmental Sciences, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
Hisayoshi Mitamura
Affiliation:
Department of Environmental Sciences, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
Hiroyasu Fukuyama
Affiliation:
Department of Environmental Sciences, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
Fumitaka Esaka
Affiliation:
Department of Environmental Sciences, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
Sridhar Komarneni
Affiliation:
Department of Crop and Soil Sciences and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania, 16802
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Abstract

Titration of copper acetate solution with a dilute NaOH solution to pH 6.5 and subsequent aging at 313 K yielded copper hydroxide acetate with an analytical composition of Cu2(OH)3.1(OCOCH3)0.9nH2O (n ∼ 0.7) and layered discoid crystals. The chemical composition, structure, and holistic trend in thermal behavior are similar to those of the previously known Cu2(OH)3(OCOCH3)H2O phase with layered rectangular crystals. The most obvious difference between the two compounds is morphology of the crystals. The other major differences are found in stability of bonding of the interlayer acetate ions to solid phase and behavior in anion-containing solutions. The interlayer acetate ions in the present compound begin to be dissociated from the solid phase at ∼343 K while those in the previous compound are not dissociated below 383 K. The reaction of the present compound is topotactic in Cl− and NO3− aqueous solutions but reconstructive in a SO42− aqueous solution while the reaction of the previous compound in those solutions is topotactic.

Keywords

Chemical synthesisIon-exchange materialLayered
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 11 , November 2005 , pp. 2997 - 3003
Copyright
Copyright © Materials Research Society 2005

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