Hydrothermal synthesis and crystal structure study of two novel 3-D mellitates {Nd2[C6（COO）6]（H2O）6} and {Ho2[C6（COO）6]（H2O）6}
来源期刊：Journal of Rare Earths2008年第6期
论文作者：唐小勇 乐善堂 李平 王宁 刘应亮
文章页码：800 - 803
摘 要：<正>Two novel 3-D coordination compounds, Nd2[C6（COO）6]（H2O）6 （1） and Ho2[C6（COO）6]（H2O）6 （2）, were hydrothermally synthe-sized from mellitic acid and neodymium perchlorate （or holmium perchlorate） in the alkaline aqueous solution and characterized with ele-mental analysis, TG, IR spectrum, and single crystal X-ray diffraction. The two compounds were isostructural and crystallized in the ortho-rhombic system, space group Pnnm, with a=1.3531 （4） nm, b=0.6687 （2） nm, c=1.0224（3） nm, V=0.92523（5） nm3, Z=4, D=2.630 g/cm3, F（000）=696.0, Goof=1.052. Final R indices [I >2Σ（I）]: R1=0.0195, wR2=0.0382 for 1; a=1.3411（2） nm, b=0.6586（1） nm, c=1.0116（2） nm, V=0.8935（3） nm3, Z=4, D=2.877 g/cm3, F（000）=724.0, Goof=1.061. Final R indices [I >2Σ（I）]: R1=0.0200, wR2=0.0479 for 2. In the two compounds 1 and 2, the mellitic acid ligand, in which all the carboxylate groups were deprotonated, had only one kind of coordination mode to bridge metal ions to form four-connected three-dimensional diamondiod networks.
唐小勇，乐善堂，李平，王宁，刘应亮
摘 要：<正>Two novel 3-D coordination compounds, Nd2[C6（COO）6]（H2O）6 （1） and Ho2[C6（COO）6]（H2O）6 （2）, were hydrothermally synthe-sized from mellitic acid and neodymium perchlorate （or holmium perchlorate） in the alkaline aqueous solution and characterized with ele-mental analysis, TG, IR spectrum, and single crystal X-ray diffraction. The two compounds were isostructural and crystallized in the ortho-rhombic system, space group Pnnm, with a=1.3531 （4） nm, b=0.6687 （2） nm, c=1.0224（3） nm, V=0.92523（5） nm3, Z=4, D=2.630 g/cm3, F（000）=696.0, Goof=1.052. Final R indices [I >2Σ（I）]: R1=0.0195, wR2=0.0382 for 1; a=1.3411（2） nm, b=0.6586（1） nm, c=1.0116（2） nm, V=0.8935（3） nm3, Z=4, D=2.877 g/cm3, F（000）=724.0, Goof=1.061. Final R indices [I >2Σ（I）]: R1=0.0200, wR2=0.0479 for 2. In the two compounds 1 and 2, the mellitic acid ligand, in which all the carboxylate groups were deprotonated, had only one kind of coordination mode to bridge metal ions to form four-connected three-dimensional diamondiod networks.
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