利用水熱合成含吡啶雙羧根及菲囉啉之鈷(Ⅱ)金屬配位化合物及其構造分析

Hydrothermal Synthesis and Structure of the Cobalt (Ⅱ) Complex Based on Pyridinedicarboxylate and Phenanthroline

沈福銘(Fwu-Ming Shen) ； 駱詩富(Shie-Fu Lush) ； 方茂青(Mao-Ching Fang)

《元培學報》 17期 (2010/12) Pp. 29-41

https://doi.org/10.30171/JYUST.201012.0003

摘要

將2,6-吡啶雙羧酸與NaOH反應，再與Co(NO3)2•6H2O與菲囉啉加水混合，利用水熱反應合成，得到含鈷(Ⅱ)的配位錯合物，其化學式爲[Co(pda)(phen)(H2O)]•2H2O(1)（pda=2,6-吡啶雙羧酸根，phen=l，10-菲囉啉）使用元素分析儀、FT-IR光譜儀及X-Ray品體繞射儀，測定產物品體結構及其性質，X-Ray測定結果顯示錯合物1是以鈷(Ⅱ)離子爲配位中心，含兩個O原子，以及三個N原子和一個配位分子以及兩個晶格水分子；氧原子分別來自一個吡啶雙羧酸上的第二位置以及第六位置上的O原子，氮原子分別爲雙羧酸吡啶環上的氮原子及菲囉啉環上的兩個氮原子，配位構成些扭曲八面體型的幾何結構，具有Cs對稱性。吡啶雙羧酸配位基以及配位水分子和兩個未配位晶格水分子，由於吡啶雙羧酸以及配位水分子和晶格水分子的分子間氫鍵(O-H-O)、分子內氫鍵(C-H-O)作用，以及芳香環之間的π-π吸引力，自組裝成(3-D)三維空間無限延伸的網狀結構，使得此晶體結構很穩定。

關鍵字

水熱合成 ； 2，6-吡啶雙羧酸 ； 1，10-菲囉啉 ； 氫鍵

並列摘要

A metal-organic coordination complex, [Co(pda)(phen)(H2O)]•2H2O (1) (pda=2.6-pyridinedicarboxylatc, phen=1,10-phenanthroline), has been hydro thermally synthesized from the reaction of Co(NO3)2•6H2O, NaOH, 2,6-pdaH2 and phen. The compound was structurally characterized by elemental analysis, FT-IR and single-crystal X-ray diffraction. X-ray structure analyses show the cobalt (Ⅱ) atom of the title compound is coordinated by two oxygen atoms, three nitrogen atoms and one water molecule. Two lattice water molecules were also found in close proximity to cobalt (Ⅱ). The two oxygen atoms are from to carboxyl acid (at pyridine 2 and 6 position). One of the nitrogen atoms is from to pda ligand and the others are from to phen ligand. The cobalt (Ⅱ) center can be described as a slightly distorted octahedral coordination with an approximate Cs symmetry. The structure extends to a new 3-D supramolecular network by π-π stacking interactions between aryl rings and intermolecular (O-H…O) intramolecular (C-H…O) hydrogen-bonding between pyridine-dicarboxylate, coordinated water molecules and lattice water molecules.

並列關鍵字

Hydrothermal Synthesis ； 2, 6-Pyridinedicarboxylic acid ； 1, 10-phenanthroline ； Hydrogen bonding