Probing a Hidden World of Molecular Self-Assembly: Concentration-Dependent, Three-Dimensional Supramolecular Interconversions
作者:Xiaocun Lu、Xiaopeng Li、Kai Guo、Ting-Zheng Xie、Charles N. Moorefield、Chrys Wesdemiotis、George R. Newkome
DOI:10.1021/ja511341z
日期:2014.12.31
A terpyridine-based, concentration-dependent, facile self-assembly process is reported, resulting in two three-dimensional metallosupramolecular architectures, a bis-rhombus and a tetrahedron, which are formed using a two-dimensional, planar, tris-terpyridine ligand. The interconversion between these two structures is concentration-dependent: at a concentration higher than 12 mg mL(-1), only a bis-rhombus
报道了一种基于三联吡啶的、浓度依赖的、简便的自组装过程,产生了两个三维金属超分子结构,一个双菱形和一个四面体,它们是使用二维平面三三联吡啶配体形成的。这两种结构之间的相互转换是浓度依赖性的:在浓度高于 12 mg mL(-1) 时,仅形成由 8 个配体和 12 个 Cd(2+) 离子组成的双菱形;而由四个配体和六个 Cd(2+) 离子组成的自组装四面体在充分稀释三联吡啶金属溶液后出现。在浓度小于 0.5 mg mL(-1) 时,仅检测到具有 S4 对称轴的四面体;在尝试隔离后,它在数量上恢复为双菱形。