State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, People's Republic of China.
University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
Nat Commun. 2023 Mar 28;14(1):1735. doi: 10.1038/s41467-023-37455-3.
The ultrafast transport of adsorbates in confined spaces is a goal pursued by scientists. However, diffusion will be generally slower in nano-channels, as confined spaces inhibit motion. Here we show that the movement of long-chain molecules increase with a decrease in pore size, indicating that confined spaces promote transport. Inspired by a hyperloop running on a railway, we established a superfast pathway for molecules in zeolites with nano-channels. Rapid diffusion is achieved when the long-chain molecules keep moving linearly, as well as when they run along the center of the channel, while this phenomenon do not exist for short-chain molecules. This hyperloop-like diffusion is unique for long-chain molecules in a confined space and is further verified by diffusion experiments. These results offer special insights into molecule diffusion under confinement, providing a reference for the selection of efficient catalysts with rapid transport in the industrial field.
在受限空间中快速传输吸附质是科学家追求的目标。然而，由于受限空间限制了运动，纳米通道中的扩散通常会更慢。在这里，我们表明，随着孔径的减小，长链分子的运动增加，这表明受限空间促进了传输。受在铁路上运行的超级高铁的启发，我们在沸石的纳米通道中为分子建立了一个超快的通道。当长链分子保持线性运动以及沿通道中心运动时，快速扩散就会实现，而对于短链分子则不存在这种现象。这种类似超级高铁的扩散对于受限空间中的长链分子是独特的，并通过扩散实验得到了进一步验证。这些结果为分子在受限条件下的扩散提供了独特的见解，为工业领域中选择具有快速传输的高效催化剂提供了参考。
