Coulombic-enhanced hetero radical pairing interactions

Spin–spin interactions between two identical aromatic radicals have been studied extensively and utilized to establish supramolecular recognition. Here we report that spin-pairing interactions could also take place between two different π-electron radicals, namely a bipyridinium radical cation (BPY(...

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Detalles Bibliográficos
Autores principales: Zheng, Xujun, Zhang, Yang, Cao, Ning, Li, Xin, Zhang, Shuoqing, Du, Renfeng, Wang, Haiying, Ye, Zhenni, Wang, Yan, Cao, Fahe, Li, Haoran, Hong, Xin, Sue, Andrew C.-H., Yang, Chuluo, Liu, Wei-Guang, Li, Hao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5958055/
https://www.ncbi.nlm.nih.gov/pubmed/29773784
http://dx.doi.org/10.1038/s41467-018-04335-0
Descripción
Sumario:Spin–spin interactions between two identical aromatic radicals have been studied extensively and utilized to establish supramolecular recognition. Here we report that spin-pairing interactions could also take place between two different π-electron radicals, namely a bipyridinium radical cation (BPY(+•)) and a naphthalene-1,8:4,5-bis(dicarboximide) radical anion (NDI(─•)). The occurrence of this type of previously unreported hetero radical-pairing interactions is attributed to enhancement effect of Coulombic attraction between these two radicals bearing opposite charges. The Coulombic-enhanced hetero radical pairing interactions are employed to drive host–guest recognition, as well as the reversible switching of a bistable [2]rotaxane.

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