Labeling and Probing the Silica Surface Using Mechanochemistry and ¹⁷ O NMR Spectroscopy*.

ABSTRACT: In recent years, there has been increasing interest in developing cost-efficient, fast, and user-friendly ¹⁷ O enrichment protocols to help to understand the structure and reactivity of materials by using ¹⁷ O NMR spectroscopy. Here, we show for the first time how ball milling (BM) can be used to selectively and efficiently enrich the surface of fumed silica, which is widely used at industrial scale. Short milling times (up to 15 min) allowed modulation of the enrichment level (up to ca. 5 %) without significantly changing the nature of the material. High-precision ¹⁷ O compositions were measured at different milling times by using large-geometry secondary-ion mass spectrometry (LG-SIMS). High-resolution ¹⁷ O NMR analyses (including at 35.2 T) al

SUBMITTER: Chen CH 

PROVIDER: S-EPMC8410671 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature