Abstract
The title complex [Ca2(ma)2(H2O)2] (1), where ma2− is maleate anion, was obtained by reaction of maleic anhydride ligand and CaCO3 under hydrothemal process. Its structure was determined by single-crystal X-ray diffraction analyses, and further characterized by elemental analyses and IR spectra. Complex 1 is three-dimensional network structure, in which the Ca(II) center takes seven-coordinated distorted pentgonal bipyramidal geometry. Each ma2− anion acts as a μ4-bridge ligand to form 3D framework, in which one carboxylate group adopts a μ3-η2:η2 fashion, while the other takes a μ2-η1:η1 coordinating model. Its solid-state fluorescent property was investigated in this paper. Furthermore, we describe a simple method for the production of micro-crystalline calcite CaCO3 particles based on direct calcination of complex 1 as a precursor at moderately elevated temperature.
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