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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (9): 809-815. 上一篇    下一篇

研究论文

通过氢键构筑的含3-硝基邻苯二甲酸的层状超分子化合物

邓玉恒*,1, 王双研1, 刘娟1, 杨永丽1, 张帆1, 马宏伟2   

  1. (1首都师范大学化学系 北京 100037)
    (2中国科学院化学研究所 北京 100080)
  • 投稿日期:2006-09-22 修回日期:2006-11-16 发布日期:2007-05-14
  • 通讯作者: 邓玉恒

Layered Supramolecular Compounds with 3-Nitrophthalic Acid Assembled via Hydrogen Bonding

DENG Yu-Heng*,1; WANG Shuang-Yan1; LIU Juan1; YANG Yong-Li1; ZHANG Fan1; MA Hong-Wei2   

  1. (1 Department of Chemistry, Capital Normal University, Beijing 100037)
    (2 Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080)
  • Received:2006-09-22 Revised:2006-11-16 Published:2007-05-14
  • Contact: DENG Yu-Heng

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1465

被引次数

22 | 5

合成了含大量氢键的层状超分子化合物[C4H12N2](HL)2 (I)和[YL(HL)(H2O)3]2•2H2O (II) (H2L＝O2NC6H3- (CO2H)2, 3-硝基邻苯二甲酸), 并通过元素分析、红外分析和单晶X衍射表征了组成与结构. 化合物I为双质子化哌嗪阳离子和3-硝基邻苯二甲酸氢根阴离子组成的加合物, 阴离子之间靠强烈的O—H…O氢键形成无限链状结构, 同时阴离子链通过N—H…O氢键与阳离子扩展成网状结构, 相邻的网状结构再由分子间弱作用力构筑成层状超分子. 化合物II则是在双核稀土配合物结构单元通过O—H…O氢键构成的网状结构基础上再进一步由层间弱作用力构筑成的层状超分子化合物. 化合物II的网格结构中, 菱形单元空隙里填充的两个结晶水通过氢键将结点上的双核单元更牢固地结合在一起. 化合物I为单斜晶系, P21/c空间群, a＝1.3176(3) nm, b＝1.1096(2) nm, c＝0.75950(15) nm, b＝97.14(3)°, V＝1.1017(4) nm3, Z＝4, μ＝0.129 mm－1, Dc＝1.533 Mg/m3. 化合物II为三斜晶系, P-1空间群, a＝0.81262(16) nm, b＝0.86942(18) nm, c＝1.5011(3) nm, α＝99.84(3)°, β＝91.26(3)°, γ＝104.55(3)°, V＝1.0091(4) nm3, Z＝1, μ＝2.983 mm－1, Dc＝1.910 Mg/m3.

关键词: 氢键, 超分子, 3-硝基邻苯二甲酸, 稀土配合物, 晶体结构

Layered supramolecular compounds containing different patterns of hydrogen bonds, [C4H12N2]- (HL)2 (I) and [YL(HL)(H2O)3]•2H2O (II) (H2L＝O2NC6H3(CO2H)2, 3-nitrophthalic acid) have been synthesized and characterized by elemental analysis, IR spectra and X-ray single crystal diffraction. Compound I consists of one diprotonated piperazine cation and two 2-carboxy-6-nitrobenzoate anions. The anions are linked by the strong O—H…O hydrogen bonds into infinite chains, which further extend to sheets by the N—H…O interactions between the anion chains and cations. The 2D layers are assembled into 3D supramolecular network via the weak forces from the adjacent layers. Complex II also has a layered supramolecular architecture packed by the 2D layers, which are constructed by the dinuclear rare-earth complexes with 3-nitrophthalate via intermolecular hydrogen bonds. There are two crystallization water molecules filling up each of the rhombic pores of the network. Compound I crystallizes in the monoclinic system, space group P21/c with parameters a＝1.3176(3) nm, b＝1.1096(2) nm, c＝0.75950(15) nm, b＝97.14(3)°, V＝1.1017(4) nm3, Z＝4, m＝0.129 mm－1, Dc＝1.533 Mg/m3. Complex II crystallizes in triclinic system, space group P-1 with a＝0.81262(16) nm, b＝0.86942(18) nm, c＝1.5011(3) nm, α＝99.84(3)°, β＝91.26(3)°, γ＝104.55(3)°, V＝1.0091(4) nm3, Z＝1, m＝2.983 mm－1, Dc＝1.910 Mg/m3.

Key words: hydrogen bond, supermolecule, 3-nitrophthalic acid, rare-earth complex, crystal structure