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Reversible Transformation between Cubane and Stairstep Cu4I4 Clusters Using Heat or Solvent Vapor

机译:利用热或溶剂蒸气在古巴和阶梯式Cu4I4团簇之间可逆转化

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摘要

The controlled self-assembly of CuI and an asymmetric ligand with mixed N/S donors, 2-(tert-butyl-thio)-N-(pyridin-3-yl)acetamide (L), afforded three CuI coordination polymers (CPs), [Cu4I4L2(MeCN)(2)](n) (1), [Cu4I4L2](n) (2), and {[Cu4I4L2]center dot MeOH}(n) (3). X-ray analyses showed that CPs 1-3 are supramolecular isomers with 1, 2, and 3D structures, respectively. CP 1 adopts a stairstep Cu4I4 cluster, whereas CPs 2 and 3 are composed of cubane-like Cu4I4 clusters. Crystal-to-crystal transformations of 1 to 2 and 3 showed reversible transformations between different Cu4I4 clusters using heat or solvent (acetonitrile or methanol) vapor. CP 2 was reversibly transformed to 3 by the addition of methanol and heat. Therefore, the transformations between supramolecular isomers 1, 2, and 3 are completely reversible.
机译:CuI和具有混合N / S供体2-(叔丁基硫基)-N-(吡啶-3-基)乙酰胺(L)的不对称配体的受控自组装,得到了三种CuI配位聚合物(CP) ,[Cu4I4L2(MeCN)(2)](n)(1),[Cu4I4L2](n)(2)和{[Cu4I4L2]中心点MeOH}(n)(3)。 X射线分析表明,CP 1-3是分别具有1、2和3D结构的超分子异构体。 CP 1采用阶梯状Cu4I4簇,而CP 2和3由古巴样Cu4I4簇组成。 1到2和3的晶体间转换表明,使用热或溶剂(乙腈或甲醇)蒸气,不同Cu4I4团簇之间可逆转化。通过添加甲醇和加热将CP 2可逆地转化为3。因此,超分子异构体1、2和3之间的转化是完全可逆的。

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