Global S&T Development Trend Analysis Platform of Resources and Environment
| DOI | 10.1126/science.abb3962 |
| A precise polyrotaxane synthesizer | |
| Yunyan Qiu; Bo Song; Cristian Pezzato; Dengke Shen; Wenqi Liu; Long Zhang; Yuanning Feng; Qing-Hui Guo; Kang Cai; Weixingyue Li; Hongliang Chen; Minh T. Nguyen; Yi Shi; Chuyang Cheng; R. Dean Astumian; Xiaopeng Li; J. Fraser Stoddart | |
| 2020-06-12 | |
| 发表期刊 | Science
 |
| 出版年 | 2020 |
| 英文摘要 | Rotaxanes consist of molecular rings threaded on a central axle. Most approaches to their synthesis have focused on introducing a single ring per axle. Qiu et al. now report a systematic approach to threading up to 10 adjacent rings consecutively. The axle's end groups were constructed to attract free-floating rings when reduced and then to push those rings toward the center upon oxidation. Products of each successive reduction-oxidation cycle were characterized by nuclear magnetic resonance spectroscopy and mass spectrometry. Science , this issue p. [1247][1] Mechanically interlocked molecules are likely candidates for the design and synthesis of artificial molecular machines. Although polyrotaxanes have already found niche applications in exotic materials with specialized mechanical properties, efficient synthetic protocols to produce them with precise numbers of rings encircling their polymer dumbbells are still lacking. We report the assembly line–like emergence of poly[ n ]rotaxanes with increasingly higher energies by harnessing artificial molecular pumps to deliver rings in pairs by cyclical redox-driven processes. This programmable strategy leads to the precise incorporation of two, four, six, eight, and 10 rings carrying 8+, 16+, 24+, 32+, and 40+ charges, respectively, onto hexacationic polymer dumbbells. This strategy depends precisely on the number of redox cycles applied chemically or electrochemically, in both stepwise and one-pot manners. [1]: /lookup/doi/10.1126/science.abb3962 |
| 领域 | 气候变化 ; 资源环境 |
| URL | 查看原文 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/274471 |
| 专题 | 气候变化 资源环境科学 |
| 推荐引用方式 GB/T 7714 | Yunyan Qiu,Bo Song,Cristian Pezzato,et al. A precise polyrotaxane synthesizer[J]. Science,2020. |
| APA | Yunyan Qiu.,Bo Song.,Cristian Pezzato.,Dengke Shen.,Wenqi Liu.,...&J. Fraser Stoddart.(2020).A precise polyrotaxane synthesizer.Science. |
| MLA | Yunyan Qiu,et al."A precise polyrotaxane synthesizer".Science (2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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