Ion exchange and binding in selenium remediation materials using DNP-enhanced solid-state NMR spectroscopy #DNPNMR

Mais, Marco, Javier Torroba, Nathan S. Barrow, Subhradip Paul, and Jeremy J. Titman. “Ion Exchange and Binding in Selenium Remediation Materials Using DNP-Enhanced Solid-State NMR Spectroscopy.” Solid State Nuclear Magnetic Resonance 98 (April 2019): 19–23.

https://doi.org/10.1016/j.ssnmr.2019.01.004.

Selenate-loaded selenium water remediation materials based on polymer fibres have been investigated by dynamic nuclear polarization (DNP) enhanced solid-state NMR. For carbon-13 a significant reduction in experiment time is obtained with DNP even when compared with conventional carbon-13 NMR spectra recorded using larger samples. For the selenium remediation materials studied here this reduction allows efficient acquisition of {1H}-77Se heteronuclear correlation spectra which give information about the nature of the binding of the remediated selenate ions with the grafted side chains which provide the required ion exchange functionality.

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