Despite its advantages, 29Si NMR spectroscopy has some limitations:
1. Sensitivity: Silicon-29 has a low natural abundance (4.7%) and a low gyromagnetic ratio, resulting in lower sensitivity compared to other NMR-active nuclei. 2. Complex Spectra: The presence of multiple silicon environments can lead to complex spectra, making interpretation challenging. 3. Sample Preparation: High-quality samples are required to obtain clear and interpretable spectra, which can be difficult to achieve in some cases.
