s-Block metal ions induce structural transformations between figure-eight and double trefoil knots,Chemical Science

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s-Block metal ions induce structural transformations between figure-eight and double trefoil knots
Chemical Science ( IF 7.6 ) Pub Date : 2020/01/07 , DOI: 10.1039/c9sc05796j
Li-Long Dang _{1,

2,

3,

4,

5} , Xiang Gao _{1,

2,

3,

4,

5} , Yue-Jian Lin _{1,

2,

3,

4,

5} , Guo-Xin Jin _{1,

2,

3,

4,

5}

Affiliation

The formation of two types of heterobimetallic molecular knots, double trefoil and trefoil knots, induced by s-block metal ions, is presented. Coordination of K⁺, Ca²⁺, Sr²⁺ or Ba²⁺ ions with amide groups plays a crucial role in the formation of these trefoil knots. Remarkably, the reversible topological transformation between a figure-eight knot and double trefoil or trefoil knots can be induced by coordination of s-block metal ions to amide groups. X-ray crystallographic data and NMR experiments support the structural assignments.

中文翻译：

s-Block金属离子诱导八字形和三叶形双结之间的结构转变

提出了由s-嵌段金属离子诱导的两种类型的异双金属分子结的形成，即双三叶形和三叶形。K ⁺，Ca 2 ⁺，Sr ²⁺或Ba ²⁺离子与酰胺基的配位在这些三叶形结的形成中起关键作用。显着地，可以通过将s-嵌段金属离子配位至酰胺基团来诱导八字形结与双三叶形或三叶形结之间的可逆拓扑转变。X射线晶体学数据和NMR实验支持结构分配。

更新日期：2020-02-13

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