一种具有顺磁行为的自组装同手性自由基笼。
A Self-Assembled Homochiral Radical Cage with Paramagnetic Behaviors.
作者信息
Jiao Tianyu, Qu Hang, Tong Lu, Cao Xiaoyu, Li Hao
机构信息
Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China.
State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
出版信息
Angew Chem Int Ed Engl. 2021 Apr 26;60(18):9852-9858. doi: 10.1002/anie.202100655. Epub 2021 Mar 23.
Condensation of an inherently C -symmetric polychlorotriphenylmethyl (PTM) radical trisaldehyde with tris(2-aminoethyl)amine (TREN) yields a [4+4] tetrahedral radical cage as a racemic pair of homochiral enantiomers in 75 % isolated yield. The structure was characterized by X-ray crystallography, confirming the homochirality of each cage framework. The homochirality results from intramolecular [CH⋅⋅⋅π] and hydrogen-bonding interactions within the cage framework. The four PTM radicals in a cage undergo weak through-space coupling. Magnetic measurements demonstrated that each cage bears 3.58 spins.
将具有固有C对称性的聚氯三苯甲基（PTM）自由基三醛与三（2-氨基乙基）胺（TREN）缩合，以75%的分离产率得到一对外消旋的纯手性对映体形式的[4+4]四面体自由基笼。通过X射线晶体学对该结构进行了表征，证实了每个笼状骨架的纯手性。这种纯手性源于笼状骨架内的分子内[CH⋅⋅⋅π]和氢键相互作用。笼中的四个PTM自由基发生弱的空间耦合。磁性测量表明每个笼带有3.58个自旋。
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