Identifying and Quantifying Borate Environments in Borosilicate Glasses: ¹¹B NMR-Peak Assignments Assisted by Double-Quantum Experiments.

ABSTRACT: We discuss the prospects for accurate ¹¹B magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectral deconvolutions for reaching beyond the readily extracted borate speciations offered by the integrated resonances of the coexisting B^[3] and B^[4] species of the respective BO₃ and BO₄ network groups in borosilicate (BS) glasses. We critically review hitherto proposed ¹¹B^[3] and ¹¹B^[4] NMR-peak assignments relating to their neighboring Si, B^[3] and B^[4] species, as quantified by MAS NMR spectral deconvolution. Guidance to these resonance assignments was offered from double-quantum-single-quantum (2Q-1Q) ¹¹B MAS NMR experiments that inform about the B

SUBMITTER: Stevensson B 

PROVIDER: S-EPMC11664598 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature