Coulombic-enhanced hetero radical pairing interactions

Xujun Zheng, Yang Zhang, Ning Cao, Xin Li, Shuoqing Zhang, Renfeng Du, Haiying Wang, Zhenni Ye, Yan Wang, Fahe Cao, Haoran Li, Xin Hong, Andrew C.-H. Sue, Chuluo Yang, Wei-Guang Liu and Hao Li ()
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Xujun Zheng: Zhejiang University
Yang Zhang: Zhejiang University
Ning Cao: Zhejiang University
Xin Li: Zhejiang University
Shuoqing Zhang: Zhejiang University
Renfeng Du: Zhejiang University
Haiying Wang: Tianjin University
Zhenni Ye: Zhejiang University
Yan Wang: Zhejiang University
Fahe Cao: Zhejiang University
Haoran Li: Zhejiang University
Xin Hong: Zhejiang University
Andrew C.-H. Sue: Tianjin University
Chuluo Yang: Wuhan University
Wei-Guang Liu: University of Minnesota
Hao Li: Zhejiang University

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract 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.

Date: 2018
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DOI: 10.1038/s41467-018-04335-0

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