Abstract
Reaction of Ba0.50[Ag2Cr(C2O4)3]·5H2O with Ag2SO4 in an aqueous solution of sulfuric acid (pH ≈ 3) yielded the silver(I)/chromium(III) oxalate salt H0.50[Ag2.50Cr(C2O4)3]·5H2O (1). Compound 1 can be best described as an anionic silver-deficient oxalatochromate(III) complex [Ag2.50Cr(C2O4)3]0.5- with nanochannels containing hydrogen-bonded water molecules and protons. Thermal analyses show significant weight losses corresponding to the elimination of water molecules of crystallization followed by the decomposition of the network.
Highlights
Open AccessRecent advances in the field of chemistry have triggered the emergence of new open framework materials with a wide range of exotic properties which are expected to promote modern technologies
Compound 1 can be best described as an anionic silver-deficient oxalatochromate(III) complex [Ag2.50Cr(C2O4)3]0.5− with nanochannels containing hydrogen-bonded water molecules and protons
The FTIR spectrum of 1 (Figure 1) shows two broad bands at 3587 cm−1 and 3246 cm−1 which are assigned to water molecules of hydration within the channels
Summary
Recent advances in the field of chemistry have triggered the emergence of new open framework materials with a wide range of exotic properties which are expected to promote modern technologies. These so-called “multifunctional materials” may, be exploited in many domains such as catalysis [1] [2] [3], magnetism [4], non-linear optics [5], gas storage [6] [7] and separation processes [8], to mention just a few examples. The use of molecular building units such as tris(oxalato)metalate(III) anions, [MIII(C2O4)3]3-, has opened up tremendous possibilities for research in this area, giving rise to new compounds exhibiting a variety of nanostructured features [9] [10]
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