In Situ Electron Paramagnetic Resonance Investigation of Isotope-Selective Breathing in MIL-53 During Dihydrogen Adsorption

Fernadi Lukman M, Chetry S, Sarkar P, Bon V, Thangavel K, Kaskel S, Hirscher M, Krautscheid H, Pöppl A (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Chemistry - A European Journal Wiley

DOI: 10.1002/chem.202500088

Abstract

The development of smart materials capable of separating dihydrogen isotopologues has risen recently. Among potential candidates, the flexible MIL-53 (Al) has been gaining attention due to its structural flexibility providing the so-called ‘’breathing mechanism’’ that can be useful to separate hydrogen isotopologues selectively. In the present work, an in situ continuous wave electron paramagnetic resonance investigation has been proven as a sensitive technique to follow the isotopologue-selective adsorption-desorption of dihydrogen species on the paramagnetic metal-doped MIL-53 (Al0.99Cr0.01) and MIL-53 (Al0.99V0.01), respectively. The presence of paramagnetic spin probes such as Cr3+ and V4+ inside the MIL-53 framework allows for monitoring the framework transition including the 2nd transition step that selectively occurs at p>100 mbar when D2 gas is adsorbed on the pores at 23 K. Furthermore, investigation of D2 desorption from MIL-53 (Al0.99V0.01) by temperature-dependent hyperfine spectroscopy provides a more detailed analysis of the D2 desorption process on a microscopic scale with respect to the embedded spin probe.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Florida State University (FSU) US United States (USA) (US) Max-Planck-Institut für Intelligente Systeme / Max Planck Institute for Intelligent Systems (MPI-IS) DE Germany (DE) Universität Leipzig DE Germany (DE)

How to cite

APA:

Fernadi Lukman, M., Chetry, S., Sarkar, P., Bon, V., Thangavel, K., Kaskel, S.,... Pöppl, A. (2025). In Situ Electron Paramagnetic Resonance Investigation of Isotope-Selective Breathing in MIL-53 During Dihydrogen Adsorption. Chemistry - A European Journal. https://doi.org/10.1002/chem.202500088

MLA:

Fernadi Lukman, Muhammad, et al. "In Situ Electron Paramagnetic Resonance Investigation of Isotope-Selective Breathing in MIL-53 During Dihydrogen Adsorption." Chemistry - A European Journal (2025).

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