| 三个基于3-(2,5-二羧基苯基)-吡啶羧酸的Cu(Ⅱ)、Mn(Ⅱ)配合物的结构及磁性 | |
| Three Coordination Polymers of Cu(Ⅱ)/Mn(Ⅱ) Based on 3-(2,5-Dicarboxylphenyl)picolinic Acid: Structure and Magnetism | |
| 摘要: 通过水热法合成了3个新型配位聚合物：[Cu（Hdppa）（H2O）]n（1）、{[Cu2（dppa）（μ2-OH）（H2O）]·H2O}n（2）和{[Mn3（dppa）2（H2O）4]·2H2O}n（3），（H3dppa=3-（2，5-二羧基苯基）-吡啶羧酸），并对其进行了元素分析、红外光谱、粉末X射线衍射和热重分析表征。X射线单晶衍射分析结果表明：化合物1属于单斜晶系，P21/c空间群，a=1.371（2）nm，b=0.805（11）nm，c=1.266（19）nm，β=112.74（3）°，Z=4；化合物2属于三斜晶系，P1空间群，a=0.839（4）nm，b=1.039（5）nm，c=1.110（5）nm，α=98.31°，β=110.630（3）°，γ=111.90（3）°，Z=2；化合物3属于三斜晶系，P1空间群，a=0.881（6）nm，b=0.939（6）nm，c=1.038（7）nm，α=100.29°，β=97.990（10）°，γ=111.13（7）°，Z=1。化合物1以配体Hdppa2-桥联Cu（Ⅱ）形成一维链状结构；化合物2和3以配体dppa3-分别桥联Cu（Ⅱ）和Mn（Ⅱ）形成二维层状结构，并进一步通过氢键形成三维超分子结构。变温磁化率研究表明在化合物1和化合物2中存在较强的铁磁耦合作用，其磁交换常数分别为4.44和8.94 cm-1；而化合物3中Mn（Ⅱ）离子之间存在反铁磁相互作用。 | |
| 关键词: 配位聚合物 3-(2,5-二羧基苯基)-吡啶羧酸 晶体结构 磁性 | |
| 基金项目: 国家自然科学基金（No.21201123）、辽宁省博士启动基金（No.201501075）、辽宁省高等学校杰出青年学者成长计划（No.LJQ2014043）和辽宁特聘教授项目（No.2013204）资助。 | |
| Abstract: Three coordination polymers[Cu(Hdppa)(H2O)]n (1), {[Cu2(dppa)(μ2-OH)(H2O)]·H2O}n (2) and {[Mn3(dppa)2(H2O)4]·2H2O}n (3) (H3dppa=3-(2,5-dicarboxylphenyl) picolinic acid) have been synthesized by hydrothermal method and characterized by elemental analysis, IR spectra, PXRD and TGA. The single-crystal X-ray diffraction analysis showed that compound 1 crystalized in monoclinic system, P21/c space group, a=1.371(2) nm, b=0.805(11) nm, c=1.266(19) nm, β=112.74(3)°, Z=4. Compound 2 crystalized in triclinic system, P1 space group, a=0.839(4) nm, b=1.039(5) nm, c=1.110 (5) nm, α=98.31°, β=110.63(3)°, γ=111.90(3)°, Z=2. Compound 2 crystalized in triclinic system, P1 space group, a=0.881(6) nm, b=0.939(6) nm, c=1.038(7) nm, α=100.29°, β=97.99(10)°, γ=111.13(7)°, Z=1. For 1, Cu(Ⅱ) were bridged by Hdppa2-ligands to form a 1D chain structure. For 2 and 3, Cu(Ⅱ) and Mn(Ⅱ) were respectively linked by dppa3-ligands to form 2D layers and further extend to a 3D supramolecular structure through the hydrogen bonding interaction. Magentic susceptibility measurement indicated there were strong ferromagnetic interactions in 1 and 2, and their magnetic exchange constant was 4.44 and 8.94 cm-1 respectively. There was antiferromagnetic interaction between the neighboring Mn(Ⅱ) ions in 3. | |
| Keywords: coordination polymers 3-(2, 5-dicarboxylphenyl) picolinic acid crystal structure magnetism | |
| 投稿时间：2016-05-09 修订日期：2016-08-11 | |
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| 王淑菊,蔺明明,熊刚,由立新,丁茯,孙亚光.三个基于3-(2,5-二羧基苯基)-吡啶羧酸的Cu(Ⅱ)、Mn(Ⅱ)配合物的结构及磁性[J].无机化学学报,2016,32(10):1783-1790. | |
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