| Preparation, Crystal Structure and Enthalpy Change of Formation of the Reaction in Liquid Phase of a New Three- Dimensional Mixed-Ligand Holmium（Ⅲ）Coordination Polymer Based on Strong π-π Stacking Interactions |
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| 引用本文： | 任宜霞,陈三平,高胜利.Preparation, Crystal Structure and Enthalpy Change of Formation of the Reaction in Liquid Phase of a New Three- Dimensional Mixed-Ligand Holmium（Ⅲ）Coordination Polymer Based on Strong π-π Stacking Interactions[J].中国化学,2007,25(1):63-67. |
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| 作者姓名： | 任宜霞 陈三平 高胜利 |
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| 作者单位： | [1]Department of Chemistry, Shaanxi Key Laboratory of Physico-inorganic Chemistry, Northwest University, Xi＇an, Shaanxi 710069, China [2]Department of Chemistry, Yan ＇an University, Yah＇an, Shaanxi 716000, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 20471047） and the Natural Science Foundation of Shaanxi Province （Nos. FF05201 and FF05203）. |
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| 摘 要： | A new three-dimensional coordination polymer, Ho（5-nip）（phen）（NO3）（DMF）] （5-nip=5-nitroisophthalic acid and phen=1,10-phenanthroline）, was prepared and characterized by single crystal X-ray diffraction, elemental analysis, IR spectrum and DTG-DSC techniques. The results show that the title complex crystallizes in space group P2/m with a= 1.0906（3） nm, b =1.2804 （3） nm, c= 1.6987（4） nm, β=91.400（5）°, Z=4, Dc= 1.931 Mg/m^3, F（000）= 1352. Each Ho（Ⅲ） ion is nine-coordinated by one chelating bidentate and two monodentate bridging carboxylate groups, one chelating bidentate NO3 anion, one DMF molecule and one 1,10-phenanthroline molecule. The complex is constructed with one-dimensional ribbons featuring dinuclear units and the one-dimensional ribbons are further assembled into two-dimensional networks by strong π-π stacking interactions with the distance of 0.327 nm, then the networks are arranged into three-dimensional structure according to ABAB fashion. The complex exhibits high stability up to 600 ℃. Its enthalpy change of formation of the reaction in liquid-phase in solvent DMF was measured using an RD496-Ⅲ type microcalorimeter with a value of （-11.016±0.184） kJ·mol^-1.
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| 关 键 词： | 三维混合配基 钬配位聚合物 5-氮异酞酸 液相反应 焓变化 晶体结构 制备 强π-π重叠式相互作用 |
| 修稿时间： | 2006-01-182006-09-14 |
Preparation,Crystal Structure and Enthalpy Change of Formation of the Reaction in Liquid Phase of a New Three‐Dimensional Mixed‐Ligand Holmium(III) Coordination Polymer Based on Strong π‐π Stacking Interactions |
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| REN, Yi-xia, CHEN, San-Pinga, GAO, Sheng-Li.Preparation,Crystal Structure and Enthalpy Change of Formation of the Reaction in Liquid Phase of a New Three‐Dimensional Mixed‐Ligand Holmium(III) Coordination Polymer Based on Strong π‐π Stacking Interactions[J].Chinese Journal of Chemistry,2007,25(1):63-67. |
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| Authors: | REN Yi-xia CHEN San-Pinga GAO Sheng-Li |
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| Institution: | 1. Department of Chemistry, Shaanxi Key Laboratory of Physico‐inorganic Chemistry, Northwest University, Xi'an, Shaanxi 710069, China;2. Department of Chemistry, Yan′an University, Yan'an, Shaanxi 716000, China |
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| Abstract: | A new three‐dimensional coordination polymer, Ho(5‐nip)(phen)(NO3)(DMF)] (5‐nip=5‐nitroisophthalic acid and phen=1,10‐phenanthroline), was prepared and characterized by single crystal X‐ray diffraction, elemental analysis, IR spectrum and DTG‐DSC techniques. The results show that the title complex crystallizes in space group P2/m with a=1.0906(3) nm, b=1.2804 (3) nm, c=1.6987(4) nm, β=91.400(5)°, Z=4, Dc?1.931 Mg/m3, F(000)= 1352. Each Ho(III) ion is nine‐coordinated by one chelating bidentate and two monodentate bridging carboxylate groups, one chelating bidentate NO?3 anion, one DMF molecule and one 1,10‐phenanthroline molecule. The complex is constructed with one‐dimensional ribbons featuring dinuclear units and the one‐dimensional ribbons are further assembled into two‐dimensional networks by strong π‐π stacking interactions with the distance of 0.327 nm, then the networks are arranged into three‐dimensional structure according to ABAB fashion. The complex exhibits high stability up to 600 °C. Its enthalpy change of formation of the reaction in liquid‐phase in solvent DMF was measured using an RD496‐III type microcalorimeter with a value of (?11.016±0.184) kJ·mol?1. |
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| Keywords: | 5-nitroisophthalic acid holmium complex crystal structure enthalpy change of formation of the reaction in liquid phase |
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