| 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} |
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| 引用本文： | 唐小勇,乐善堂,李平,王宁,刘应亮. 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}[J]. 中国稀土学报(英文版), 2008, 26(6): 800-803. DOI: 10.1016/S1002-0721(09)60009-0 |
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| 作者姓名： | 唐小勇 乐善堂 李平 王宁 刘应亮 |
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| 作者单位： | School of Chemistry ＆ Environment, South China Normal University, Guangzhou 510006, China |
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| 基金项目： | Project supported by the Nature Science Foundation of Guangdong Province （7005808）, Guangdong Provincial Science and Technology Bureau （2008B010600009） and the National Natural Science Foundation of China （U0734005） |
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| 摘 要： | Two novel 3-D coordination compounds, Nd2[C6（COO）6]（H2O）6 （1）and Ho2[C6（COO）6]（H2O）6 （2）, were hydrothermaily synthesized from mellitic acid and neodymium perchlorate （or holmium perchlorate） in the alkaline aqueous solution and characterized with elemental analysis, TG, IR spectrum, and single crystal X-ray diffraction. The two compounds were isostructural and crystallized in the orthorhombic system, space group Pnnm, with a=1.3531 （4） nm, b=0.6687 （2） nm, c=1.0224（3） nm, V=0.92523（5） nm^3, Z=4, D=2.630 g/cm^3, F（000）=696.0, Goof=1.052. Final R indices [1 〉2∑（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） nm^3, Z=4, D=2.877 g/cm^3, F（000）=724.0, Goof=1.061. Final R indices [1 〉2∑（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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| 关 键 词： | 热液合成 同构 晶体结构 稀土 |
| 收稿时间： | 2007-09-07 |
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} |
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| Xiaoyong TANG, Shantang YUE, Ping LI, Ning WANG,Yingliang LIU. 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}[J]. Journal of Rare Earths, 2008, 26(6): 800-803. DOI: 10.1016/S1002-0721(09)60009-0 |
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| Authors: | Xiaoyong TANG Shantang YUE Ping LI Ning WANG Yingliang LIU |
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| Affiliation: | aSchool of Chemistry & Environment, South China Normal University, Guangzhou 510006, China |
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| Abstract: | Two novel 3-D coordination compounds, Nd2[C6(COO)6](H2O)6 (1) and Ho2[C6(COO)6](H2O)6 (2), were hydrothermally synthesized from mellitic acid and neodymium perchlorate (or holmium perchlorate) in the alkaline aqueous solution and characterized with elemental analysis, TG, IR spectrum, and single crystal X-ray diffraction. The two compounds were isostructural and crystallized in the orthorhombic 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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| Keywords: | hydrothermal synthesis isostructural crystal structure mellitic acid rare earths |
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