A new Mg(II)−Sm(III) heterometallic coordination polymer (Cp) with the formula [Sm₂(pydc)₆Mg₃(H₂O)₆] ⋅ 11H₂O (1) (H₂pydc=pyridine‐2,6‐dicarbolylic acid) has been solvothermal synthesized by reacting pyridine‐2,6‐dicarbolylic acid, Sm(NO₃)₃ ⋅ 6H₂O, MgCl₂ ⋅ 6H₂O and imidazole at 393 K for 48 h. It was characterized by single‐crystal X‐ray diffraction, elemental analysis, IR and TGA. The results show that coordination polymer 1 exhibits a three‐dimensional network structure and crystallizes in hexagonal crystal system, space group P6/mcc, with crystallographic data of a=15.4203(6) Å, b=15.4203(6) Å, c=15.2563(6) Å, α=β=90°, γ=120°, V=3141.7(3) ų, and Z=2. The twenty‐member water cluster structure and topological structure of compound 1 were analyzed, and its luminescent properties were studied. It presents the characteristic emission spectra of Sm(III) ions.

中文翻译：

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包含20个成员水簇的3D Mg（II）-Sm（III）杂金属配位聚合物的合成，晶体结构和发光性质

一种新型的Mg（II）-Sm（III）杂金属配位聚合物（Cp），其分子式为[Sm ₂（pydc）₆ Mg ₃（H ₂ O）₆ ] ⋅11H ₂ O（1）（H ₂ pydc =吡啶- 2,6- dicarbolylic酸）已经由吡啶-2,6- dicarbolylic酸，SM（NO反应而被合成溶剂热₃）₃  ⋅6H ₂ O，的MgCl ₂  ⋅6H ₂在393K下48小时O和咪唑。通过单晶X射线衍射，元素分析，IR和TGA对其进行表征。结果表明，配位聚合物1呈现出三维网状结构和结晶在六方晶系，空间群P 6 / MCC，具有晶体学数据一个= 15.4203（6），b = 15.4203（6），C ^ = 15.2563（6）A，α = β = 90°，γ = 120°，V = 3141.7（3）³，和ž = 2。分析了化合物1的二十元水团簇结构和拓扑结构，并研究了其发光性质。它显示了Sm（III）离子的特征发射光谱。