Radical Cyclic [3]Daisy Chains
| Autor: | Dengke Shen, Charlotte L. Stern, Xiaopeng Li, Bo Song, George C. Schatz, Huang Wu, Tianyu Jiao, Yi Shi, Wenqi Liu, Long Zhang, Kang Cai, Hao Li, Hongliang Chen, Leighton O. Jones, Yang Jiao, Yunyan Qiu, J. Fraser Stoddart, Yu Wang, Suneal Vemuri, Heng Wang, Binbin Cui |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering Radical Biochemistry (medical) Cationic polymerization 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Biochemistry Combinatorial chemistry 0104 chemical sciences Membrane Template Materials Chemistry Environmental Chemistry Molecule 0210 nano-technology |
| Zdroj: | Chem. 7:174-189 |
| ISSN: | 2451-9294 |
| Popis: | Summary Mechanically interlocked molecules (MIMs) that undergo controllable 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. |
| Databáze: | OpenAIRE |
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