Synthesis, structure and of two new 1-D Lanthanide(Ⅲ) Coordination polymers based on the ligand Pyridine-2-carboxylate

兩個鑭（III）系金屬一維配位聚合物含吡啶-2-羧酸根合成及結構分析

沈福銘(Fwu-Ming Shen) ； 駱詩富(Shie-Fu Lush)

《元培學報》 24期 (2019/12) Pp. 26-37

摘要

Two lanthanide(Ⅲ) coordination complexes [Ln_2(pya)_6]_n (Ln = Pr (1) and Nd (2); pya = pyridine-2-carboxylate) were prepared by hydrothermal reaction. The crystal structures were determined by X-ray crystal diffraction and both of two coordination complexes are isostructures. The complexes form a one-dimensional chain polymer with a tridentate carboxylato-bridged (μ_2-η^2: η^1-bridging coordination mode). In both structures, intermolecular C-H...O hydrogen bonds link the molecules, forming a supramoleular network structure. The nearest Ln...Ln is 3.956(1) Å of 1 and 3.946(2) Å of 2, respectively.

關鍵字

Crystal Structure ； Lanthanide(Ⅲ) Complex ； Coordination Polymer ； pyridine-2-carboxylate

並列摘要

利用水熱合成反應，得到兩個含吡啶-2-羧酸根的鑭（Ⅲ）系金屬配位化合物[Ln_2（pya）_6]_n（Ln = Pr （1） 及 Nd （2）; pya = 吡啶-2-羧酸根）。利用X-Ray晶體繞射儀測定產物晶體結構，兩個配位錯合物的結構相類似。錯合物以三配位羧酸根為橋鍵（μ_2-η^2:η^1-橋鍵配位模式）形成一維鏈狀聚合物。晶體結構中含有分子間C-H...O氫鍵，連結錯合物分子形成超分子網狀聚合物。金屬間最近距離Ln...Ln分別為3.956（1）Å化合物1及3.946（2）Å化合物2。

並列關鍵字

晶體結構 ； 鑭（Ⅲ）系錯合物 ； 配位聚合物 ； 吡啶-2-羧酸