六元瓜环与La(Ⅲ)离子在不同阴离子Cu(Ⅱ)盐诱导作用下的晶体结构

Crystal Structure of cucurbit[6]uil with La(Ⅲ) in the Presence of Different Cu(Ⅱ) Salts as the Structure Inducer

在CuCl2或Cu(NO3)2存在条件下,分别合成了六元瓜环(Q[6])与La(NO3)3形成的配合物,并通过单晶X-射线衍射方法对其结构进行了测定。结果表明,在两种不同阴离子铜(Ⅱ)盐诱导作用下,Q[6]与La3+离子都直接配位形成了"半分子胶囊"结构的配合物。进一步研究表明,在CuCl2溶液中,六元瓜环(Q[6])与La(NO3)3形成的"半分子胶囊"通过结晶水分子形成了一维超分子链。而在Cu(NO3)2溶液中,六元瓜环(Q[6])与La(NO3)3形成的"半分子胶囊"则通过共用硝酸根阴离子形成了一维超分子链。

Two X-ray crystal were obtained from a solution containing cucurbit[6] uil （Q[6]） with La3＋ in the presence of CuC12 or Cu （ NO3 ） 2 as the structure inducer respectively, and structurally characterized by single crystal X-ray diffraction. Crystal structures show that Q[ 6 ] coordiantion with La cation resulting in the forma tion of same semi-molecular capsules, but the further supramolecualr interactions of both capsules with different hvdrogen bonding such as through water or nitrate anions.