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Study on shuttling mechanism the bistable rotaxane based on the radical interaction by quantum chemical calculations

WANG Tao, LI Xiaoyi   

  1. Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2022-04-14 Revised:2022-05-10 Online:2022-05-12

Abstract: We designed a switchable bistable rotaxane consisted of the cyclobis (paraquat-p-phenylene) bisradical dicationic (CBPQT2(●+)) ring and a main chain, concluding the recognition sites 4,4′-bipyridinium radical cationic (BIPY●+ ) and 2,6-dioxynaphthalen(DOP). The density functional theory (DFT) is used to analyze the motion mechanism of ring along the main chain A. Quantum Mechanics calculations are used to analyze the noncovalent interaction between the CBPQT2(●+) ring and the two recognition sites. It proves that the generation and dissociation of the trisradical tricationic complex controlled by the redox reaction could drive the reciprocating motion of the CBPQT2(●+) ring along the main chain between the two recognition sites.

Key words: molecular shuttle, bistable rotaxane, Quantum Mechanics Calculation, radical interaction

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