基于(S)-(+)-扁桃酸和1,3-二(4-吡啶基)-丙烷构筑的手性Co(Ⅱ)-配合物的晶体结构、磁性和铁电性能研究

Crystal Structures ,Magnetic and F erroelectric Properties ofA Co( Ⅱ )-complex Constructed byS- (+)-Mandelic Acid and 1,3-Bis(4- pyridyl)- propane

以手性的S-(+)-扁桃酸(S-(+)-H2opa)和中性的1,3-二(4-吡啶基)-丙烷(bpp)为配体,在溶剂热条件下合成了Co(Ⅱ)-配合物:[Co(S-<+)-Hopa)2(bpp)]。(1).单晶X-射线衍射研究证实该配合物属于六方晶系,C6手性空间群,P6122极性点群.bpp配体的端基氮原子与Co(Ⅱ)离子配位,形成在空间三个方向均匀分布的一维链,并通过分子间氢键拓展成三维超分子结构.此外,对配合物1进行了粉末X-射线衍射、热失重、磁性和铁电性能研究,结果表明该配合物同时显示出弱铁磁和铁电性能.

A novel Co(Ⅱ)-complex, [Co(S-(+)-Hopa)2(bpp)]n(1), was synthesized under solvothermal condition using chiral S-(+)-mandelic acid(S-(+)-H2 opa) and neutral 1,3-bis(4-pyridyl)-propane(bpp) as co-ligands. Single crystal X-ray analysis confirms that 1 belongs to hexagonal system, chiral space group C6 and polar point group P6122. The end group nitrogen atoms on the bpp ligand coordinate with Co(Ⅱ)ions, resulting in one-dimensional(1 D) chains with uniform distribution in three directions. These chains are extended to 3 D supramolecular structure through intermolecular hydrogen bonds. In addition, powder Xray diffraction(PXRD), thermogravimetric analysis, magnetic and ferroelectric properties were also studied.The results show that complex 1 exhibits both weak ferromagnetic and ferroelectric properties.