Departamento de Química and Centro de Investigaciones Científicas Avanzadas (CICA), Facultad de Ciencias, Universidade da Coruña, E-15071 A Coruña, Spain.
Departamento de Química Orgánica and Unidad de Excelencia de Química (UEQ), Facultad de Ciencias, Universidad de Granada, Avda. Fuente Nueva S/N, 18071 Granada, Spain.
Dalton Trans. 2022 Dec 20;52(1):90-96. doi: 10.1039/d2dt02955c.
Self-assembly with the square-planar Pd(II) or Pt(II) (en)M(ONO) (en = ethylenediamine) complexes of ditopic ligands incorporating both ,'-dialkyl-4,4'-bipyridinium and -monoalkyl-4,4'-bipyridinium or -monoalkyl-2,7-diazapyrenium moieties leads to constitutionally dynamic systems responsive to the concentration of the components. At low concentrations, the metallamacrocyclic mononuclear [M] species is formed. In contrast, when the concentration is increased, a defined dinuclear [M] structure appears as a second species in equilibrium, becoming the major one at high concentrations. Besides concentration changes, the addition of an aromatic guest also allows the control of the system speciation, shifting the outcome of the metal-directed self-assembly towards the mononuclear metallacycle. This dynamic behavior enables the control of the nuclearity of the metallacycles assembled by external stimuli.
具有正方形平面的 Pd(II) 或 Pt(II)（en）M(ONO)（en = 乙二胺）配合物与包含,'-二烷基-4,4'-联吡啶和 -单烷基-4,4'-联吡啶或 -单烷基-2,7-二氮杂并[9,10]菲翁部分的双齿配体自组装导致对组件浓度的响应的构象动态系统。在低浓度下，形成金属大环单核 [M] 物种。相比之下，当浓度增加时，确定的双核 [M] 结构作为第二种物质出现在平衡中，在高浓度时成为主要物质。除浓度变化外，芳香客体的加入还允许控制体系的形态，使金属导向的自组装的结果向单核金属环转移。这种动态行为使我们能够通过外部刺激控制组装的金属环的核数。
