Backbone‐Bridging Promotes Diversity in Heteroleptic Cages,Angewandte Chemie International Edition

当前位置： X-MOL 学术 › Angew. Chem. Int. Ed. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Backbone‐Bridging Promotes Diversity in Heteroleptic Cages
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-10-28 , DOI: 10.1002/anie.202012425
Kai Wu ₁ , Bo Zhang ₁ , Christoph Drechsler ₁ , Julian J. Holstein ₁ , Guido H. Clever ₁

Affiliation

The combination of shape‐complementary bis‐monodentate ligands L^A and L^B with Pd^II cations yields heteroleptic cages cis‐[Pd₂L^A₂L^B₂] by self‐sorting. Herein, we report how such assemblies can be diversified by introduction of covalent backbone bridges between two L^A units. Together with solvent and guest effects, the flexibility of these linkers can modulate nuclearity, topology, and number of cavities in a family of four structurally diverse assemblies. Ligand L^A1, with flexible linker, reacts in CH₃CN with its L^B counterpart to a tetranuclear dimer D1. In DMSO, however, a trinuclear pseudo‐tetrahedron T1 is formed. The product of L^A2, with rigid linker, looks similar to D1, but with a rotated ligand arrangement. In presence of an anionic guest, this dimer D2 transforms and a hexanuclear prismatic barrel P2 crystallizes. We demonstrate how controlling a ligand's coordination mode can trigger structural differentiation and increase complexity in metallo‐supramolecular assembly.

中文翻译：

骨干桥接促进了异方性笼养的多样性

形状互补的双单齿配体L ^A和L ^B与Pd ^II阳离子的结合可通过自分选产生顺式[cd] [Pd ₂L ^A₂L ^B₂ ]笼。在本文中，我们报告了如何通过在两个L ^A单元之间引入共价主链桥来使此类组装多样化。连同溶剂效应和客体效应一起，这些连接子的灵活性可以调节四个结构不同的组件族中的核，拓扑和腔数。具有柔性连接基的配体L ^A1在CH ₃ CN中与其L反应^B对应于四核二聚体D1。但是，在DMSO中，形成了三核伪四面体T1。的产品大号^A2，与刚性接头，类似于D1，但有一个旋转的配位体结构。在阴离子客体的存在下，该二聚体D2转变并且六核棱柱形桶P2结晶。我们证明了控制配体的配位模式如何触发结构分化并增加金属-超分子组装的复杂性。

更新日期：2020-10-28

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11