Asymmetric rotations slow down diffusion under confinement.

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Tác giả: Qun Cai, Mingbin Gao, Pan Gao, Guangjin Hou, Niina H Jalarvo, Yi Ji, Xun Kan, Cheng Li, Haohan Li, Yi Li, Fengqing Liu, Fujian Liu, Zhiqiang Liu, Naresh C Osti, Jingyi Tan, Xiaomin Tang, Shutao Xu, Jiaao Xue, Fangxiu Ye, Mao Ye, Jiamin Yuan, Anmin Zheng, Yongcun Zou

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: England : Nature communications , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 682031

Translation and rotation are the two most fundamental forms of diffusion, yet their coupling mechanism is not clear, especially under confinement. Here, we provided evidence of the coupling between rotation and translation using a substituted benzene molecule as an example. A counterintuitive behavior was observed where the movement of the smaller molecule with an asymmetric shape was unexpectedly slower than the larger one with a symmetric shape in confined channels of zeolite. We showed that this diffusion behavior was caused by the presence of the specific and selective interaction of the asymmetric guest with the pores, which increased the local restricted residence time, thus inhibiting the translation under confinement, as further confirmed by dynamic breakthrough curves, uptake measurements, quasi-elastic neutron scattering, and
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