三维配位聚合物[Cu2(pda)2(bpp)]的合成和结构

利用间苯二乙酸,1,3-二(4-吡啶)丙烷和硝酸铜在水热条件下反应制备了一种新型三维配位聚合物[Cu2(pda)2(bpp)](1)(H2pda=间苯二乙酸,bpp=1,3-二(4-吡啶基)丙烷)。通过X单晶衍射测定了晶体结构,并用元素分析、红外光谱、热重分析等技术对其进行表征。配合物属单斜晶系,空间群为P2(1)/c,a=24.412(1)nm,b=12.632(5)nmc,=10.076(4)nm,β=95.134(4)°,Z=4。晶体结构分析表明:在配合物1中,铜离子均形成六配位微扭曲八面体,较为特殊的是在双核结构单元中存在着轮浆[Cu2(CH2COO)4]次级单元。这些次级单元通过顺式桥连双齿间苯二已酸的连接形成(4,4)网格二维波浪面。毗邻的波浪网面又通过1,3-二(4-吡啶基)丙烷配体的连接支撑,拓展为复杂的三维网络结构。

Synthesis and Structure of a 3D Complex[Cu2(pda)2(bpp)]

A new 3D complex [Cu2（pda）2（bpp）]（1） was synthesized with using H2pda, bpp （Hzpda=1, 3-phenylenediacetic acid, bpp=1, 3-bi （4-pyridyl）propane） and Cu （NO3）2 under hydrothermal condition and its structure was characterized by means of elemental analysis, thermogravimetric analysis, IR and single crystal X-ray diffraction. The results showed that the compound 1 is monoclinic, with space group P2 （1）/c, a=24.412 （1）nm, b=12.632（5） nm, c=10.076（4） nm, 13--95.134 （4）°, Z=4. The crystal structure of compound 1 revealed that each CulI center was six-coordinated, forming a slightly distorted octahedron geometry in the dinuclear unit. Especially, there was a paddle-wheel [Cu2（CH2COO）4] secondary building unit in the dinuclear unit. These secondary building units were connected by the cis-pda adoping bis （bidentate） coordination, and formed 2D （4,4） layers. Furthermore, the 2D layers expanded complex 3D network architecture through the bpp ligands linking interaction.