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Radical Cyclic [3]Daisy Chains
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DOI：10.1016/j.chempr.2020.11.004.png)
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摘要
En 中文
Mechanically interlocked molecules (MIMs) that undergo control-lable internal motions of their component parts in more than one dimension are rare entities in the molecular world. Cyclic [2]daisy chains ([c2]DCs) are a class of MIMs that have been identified as prototypes for molecular muscles. It remains, however, a challenge to synthesize [cn]DCs with n > 2 selectively and efficiently. Herein, we report the design and synthesis of [c3]DCs employing radical and anionic templates. Two mechanically interlocked [c3]DCs with 18 positive charges were obtained in >90% yields. One [c3]DC displayed good air stability in its radical cationic form, while the other underwent reversible co-conformational switching between open macrocyclic and closed trisarm-shaped forms under electrochemical control. These findings provide not only two-dimensional MIMs with attractive electronic and switchable properties, but also a starting point for the design of extended molecular arrays, which could become the forerunners of adjustable molecular nets and breathable molecular membranes.
Keyword:
MOLECULAR MACHINES
MECHANICAL BOND
ROTAXANES
POLYMERS
TRANSFORMATION
ACTUATORS
TOPOLOGY
SHUTTLES
PROGRESS
MUSCLES
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期刊
IF:
19.6
论文数:
2.8K
被引数:
3.0W
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OAAI分享收藏Tuning radical interactions in trisradical tricationic complexes by varying host-cavity sizes.png)
CHEMICAL SCIENCEOAAI
CHEMICAL SCIENCEIF7.4
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