Steering diffusion selectivity of chemical isomers within aligned nanochannels of metal-organic framework thin film

Tanmoy Maity, Susmita Sarkar, Susmita Kundu, Suvendu Panda, Arighna Sarkar, Raheel Hammad, Kalyaneswar Mandal, Soumya Ghosh (), Jagannath Mondal () and Ritesh Haldar ()
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Tanmoy Maity: Gopanpally
Susmita Sarkar: Gopanpally
Susmita Kundu: Gopanpally
Suvendu Panda: Gopanpally
Arighna Sarkar: Gopanpally
Raheel Hammad: Gopanpally
Kalyaneswar Mandal: Gopanpally
Soumya Ghosh: Gopanpally
Jagannath Mondal: Gopanpally
Ritesh Haldar: Gopanpally

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract The movement of molecules (i.e. diffusion) within angstrom-scale pores of porous materials such as metal-organic frameworks (MOFs) and zeolites is influenced by multiple complex factors that can be challenging to assess and manipulate. Nevertheless, understanding and controlling this diffusion phenomenon is crucial for advancing energy-economic membrane-based chemical separation technologies, as well as for heterogeneous catalysis and sensing applications. Through precise assessment of the factors influencing diffusion within a porous metal-organic framework (MOF) thin film, we have developed a chemical strategy to manipulate and reverse chemical isomer diffusion selectivity. In the process of cognizing the molecular diffusion within oriented, angstrom-scale channels of MOF thin film, we have unveiled a dynamic chemical interaction between the adsorbate (chemical isomers) and the MOF using a combination of kinetic mass uptake experiments and molecular simulation. Leveraging the dynamic chemical interactions, we have reversed the haloalkane (positional) isomer diffusion selectivity, forging a chemical pathway to elevate the overall efficacy of membrane-based chemical separation and selective catalytic reactions.

Date: 2024
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DOI: 10.1038/s41467-024-53207-3

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