A single-molecule van der Waals compass
| العنوان: | A single-molecule van der Waals compass |
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| المؤلفون: | Dali Cai, Xiao Chen, Boyuan Shen, Hao Xiong, Yu Han, Xin Liu, Weizhong Qian, Ivan Lazic, Eric G.T. Bosch, Huiqiu Wang, Fei Wei, Shifeng Jin |
| المصدر: | Nature. 592:541-544 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Work (thermodynamics), Multidisciplinary, Materials science, Intermolecular force, 02 engineering and technology, Electron, 010402 general chemistry, 021001 nanoscience & nanotechnology, Channel geometry, 01 natural sciences, 0104 chemical sciences, symbols.namesake, Transmission electron microscopy, Chemical physics, symbols, Molecule, van der Waals force, 0210 nano-technology, Porous medium |
| الوصف: | Single-molecule imaging is challenging but highly beneficial for investigating intermolecular interactions at the molecular level1–6. Van der Waals interactions at the sub-nanometre scale strongly influence various molecular behaviours under confinement conditions7–11. Inspired by the traditional compass12, here we use a para-xylene molecule as a rotating pointer to detect the host–guest van der Waals interactions in the straight channel of the MFI-type zeolite framework. We use integrated differential phase contrast scanning transmission electron microscopy13–15 to achieve real-space imaging of a single para-xylene molecule in each channel. A good correlation between the orientation of the single-molecule pointer and the atomic structure of the channel is established by combining the results of calculations and imaging studies. The orientations of para-xylene help us to identify changes in the van der Waals interactions, which are related to the channel geometry in both spatial and temporal dimensions. This work not only provides a visible and sensitive means to investigate host–guest van der Waals interactions in porous materials at the molecular level, but also encourages the further study of other single-molecule behaviours using electron microscopy techniques. The orientation of a rotating para-xylene molecule in the nanochannel of a zeolite framework can be visualised by electron microscopy to determine the host–guest van der Waals interaction inside the channel. |
| تدمد: | 1476-4687 0028-0836 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::5054b6a8719026aa8a019066cb76fec9 https://doi.org/10.1038/s41586-021-03429-y |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........5054b6a8719026aa8a019066cb76fec9 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 14764687 00280836 |
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