[2]Pseudorotaxane and [2]Rotaxane Molecular Shuttles: Self-Assembly through Second-Sphere Coordination of Thiocyanate Ligands
作者:Barry A. Blight、Xu Wei、James A. Wisner、Michael C. Jennings
DOI:10.1021/ic701021p
日期:2007.10.1
A Pd(Py)(2)(SCN)(2) complex is shown to form a [2]pseudorotaxane complex with a macrocyclic tetralactam, which binds in the solid state through an unexpected complexation geometry. The intermolecular complexation is further applied to template the formation of a [2]rotaxane. The interlocked product acts as a degenerate molecular shuttle in solution, which is consistent with the co-conformation observed
Formation of a [2]rotaxane and [2]catenane based on PdBr<sub>2</sub>L<sub>2</sub> as a template
作者:Barry A Blight、James A Wisner、Michael C Jennings
DOI:10.1139/v08-126
日期:2009.1.1
of [2]pseudorotaxanes, albeit with weaker affinities than the analogous palladium(II) dichloride species. Here, the self-assembly of both [2]rotaxane (2) and [2]catenane (5) were attempted using a PdBr2L2 centre as the template, resulting in the desired interlocked structures. The structures were confirmed by NMR spectroscopy, CSI-MS, and single crystal X-ray diffraction analyses. [2]Rotaxane 2 was
先前的研究已经确定,中性二溴化钯 (II) 络合物是 [2] 假轮烷形成的模板,尽管其亲和力比类似的二氯化钯 (II) 物质弱。在这里,使用 PdBr2L2 中心作为模板尝试了 [2] 轮烷 (2) 和 [2] 链烷 (5) 的自组装,从而产生了所需的互锁结构。通过NMR光谱、CSI-MS和单晶X射线衍射分析证实了结构。[2] 轮烷 2 的分离率为 53%,[2] 链烷 5 的分离率为 41%。与氯化物类似物相比,观察到的产率较低可归因于二溴化钯 (II) 亚基的模板效应降低,这是由间苯二甲酰胺裂隙中溴化物的不良空间配合和溴化物作为氢键受体的能力降低引起的.关键词:
Synthesis of a [2]rotaxane through first- and second-sphere coordination
作者:Barry A. Blight、James A. Wisner、Michael C. Jennings
DOI:10.1039/b610243c
日期:——
In an effort to expand the application of a new template from interpenetrated to interlocked molecular species, we report the synthesis of a new [2]rotaxane by means of both first- and second-sphere coordination of a palladium(II) dichloride subunit.