1,3-丙二胺缩邻香兰素同三核氯化稀土配合物的合成和晶体结构

Synthesis and crystal structure of N,N′-bis(2-hydroxy-3-methoxybenzylidene)-1,3-propanediamine trinuclear chloride lanthanide complexes

通过柔性配体1,3-丙二胺缩邻香兰素(H2L)与LnCl3·6H2O(Ln=Er,Lu)反应,合成了2个同三核稀土配合物[Er3L′3(OH)2Cl(H2O)5]Cl3·4H2O(1)和[Lu3L′3(OH)2Cl(H2O)5]Cl3·4H2O(2),配体1,3-丙二胺缩邻香兰素发生分解,分解后的邻香兰素(HL′)与稀土配位,X-射线单晶衍射分析进一步确定了两个配合物的晶体结构。配合物均为零维的三核化合物,三核单元由氢健连接形成了1D超分子链状结构,通过氢健和π-π健之间的相互作用形成2D超分子网状结构,相邻的网状结构通过氢健的相互作用进一步形成3D超分子结构。

Complexes [Er3L＇3（OH）2Cl（H20）5]Cl3·4H2O（1） and [Lu3L＇3（0H）2Cl（H20）5]Cl3·4H2O（2） have been synthesized by reactions of N,N＇- bis （2-hydroxy-3-methoxybenzylidene）-l,3- propanediamine （H2L） with LnCl3 · 6H20 （Ln = Er, Lu）. The ligand （HL＇ = 2-hydroxy-3- methoxybenzaldehyde） is supposed to result from the decomposition of H2L and coordinate with the lanthanide. X-ray diffraction analysis reveals that complexes 1 and 2 are unique trinuclear structures. Noticeable, the trinuclear units are connected by the hydrogen bonding interactions forming a 1D supramolecular chain, which are further linked rough the hydrogen bonding and π-π interactions （3. 711 A） to generate a 2D supramolecular network. The adjacent 2D networks are packed into a 3D supramolecular architecture by the hydrogen bonding interactions.