A cyclohexane-based ligand (1) as a triconnected linker forms a supramolecular gel in the presence of transition metal ions, particularly Cd2+ and Zn2+. 1 can also be gelated with cadmium counter ions such as NO3â, ClO4â and SO42â. The gels have been characterized by SEM, TEM, rheometry and single crystal X-ray crystallography. The Cd2+âcyclohexane-based ligand gel shows a fibrillar structure with diameters ranging from 20â50 nm. X-ray analysis revealed that 1 forms a 1D coordination polymer structure with the Cd2+ ion, with an octahedral structure. The rheological properties of the Cd2+âcyclohexane-based ligand gel were strongly dependent on the concentration of Cd2+. Furthermore, the xerogel 1 with Cd2+ acted as a base catalyst in the Knoevenagel condensation reaction.
以
环己烷为基质的
配体(1)作为三键连接体,在过渡
金属离子(尤其是 Cd2+ 和 Zn2+)的作用下形成超分子凝胶。1 还能与
镉反离子(如
NO3â、
ClO4â和 SO42â)凝胶化。这些凝胶已通过
SEM、
TEM、流变仪和单晶 X 射线晶体学进行了表征。基于 Cd2+âcyclohexane 的
配体凝胶呈纤维状结构,直径在 20-50 纳米之间。X 射线分析表明,1 与 Cd2+ 离子形成一维配位聚合物结构,具有八面体结构。Cd2+âcyclohexane
配体凝胶的流变特性与 Cd2+ 的浓度密切相关。此外,含有 Cd2+ 的 xerogel 1 在 Knoevenagel 缩合反应中起到了碱催化剂的作用。