Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide An in situ pulsed electron paramagnetic resonance spectroscopy approach based on three-pulse electron spin echo envelope modulation has been implemented to monitor the adsorption of deuterium (D 2 ) and deuterium hydride (HD) gases into the pores of ZIF-8 on a local microscopic scale within the environment of paramagnetic spin probes such as TEMPO radicals and Cu 2+ ions. The desorption of D 2 could be followed up to a temperature of 40 K employing the TEMPO probe, where the majority of the gas has left the pores of ZIF-8. In contrast, H 2 gas was not detectable at 20 K with this technique due to the predominant para -hydrogen form. The approach utilizing TEMPO radicals can be used as reliable probes to sense weakly coupled D 2 or HD adsorbed into the pores of ZIF-8 without interference from the magnetically active 14 N nuclei from the organic linker as we observed for HD adsorption on the Cu 2+ -doped ZIF-8 material.
Institution: Leipzig University
Language: English
Subfield: Biophysics
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W4407537895