Dual stimuli-responsive rotaxane-branched dendrimers with reversible dimension modulation

Xu-Qing Wang, Wei Wang, Wei-Jian Li, Li-Jun Chen, Rui Yao, Guang-Qiang Yin, Yu-Xuan Wang, Ying Zhang, Junlin Huang, Hongwei Tan, Yihua Yu, Xiaopeng Li, Lin Xu () and Hai-Bo Yang ()
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Xu-Qing Wang: East China Normal University
Wei Wang: East China Normal University
Wei-Jian Li: East China Normal University
Li-Jun Chen: East China Normal University
Rui Yao: East China Normal University
Guang-Qiang Yin: East China Normal University
Yu-Xuan Wang: East China Normal University
Ying Zhang: Beijing Normal University
Junlin Huang: East China Normal University
Hongwei Tan: Beijing Normal University
Yihua Yu: East China Normal University
Xiaopeng Li: University of South Florida
Lin Xu: East China Normal University
Hai-Bo Yang: East China Normal University

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract With the aim of mimicking biological machines, in which the delicate arrangement of nanomechanical units lead to the output of specific functions upon the external stimulus, the construction of dual stimuli-responsive rotaxane-branched dendrimers was realized in this study. Starting from a switchable organometallic [2]rotaxane precursor, the employment of a controllable divergent approach allowed for the successful synthesis of a family of rotaxane-branched dendrimers up to the third generation with 21 switchable rotaxane moieties located on each branch. More importantly, upon the addition and removal of dimethylsulfoxide (DMSO) molecule or acetate anion as the external stimulus, the amplified responsiveness of the switchable rotaxane units endowed the resultant rotaxane-branched dendrimers the solvent- or anion-controlled molecular motions, thus leading to the dimension modulation. Therefore, we successfully constructed a family of rotaxane-branched dendrimers with dual stimuli-responsiveness that will be a privileged platform for the construction of dynamic supramolecular materials.

Date: 2018
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DOI: 10.1038/s41467-018-05670-y

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