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| Structure and thermal stability of column chromatography silica gel |
| Ma Yaling, Wang Jian, Wang Lihuan, Yu Yajuan |
| Shijiazhuang Yiling Pharmaceutical Corporation Ltd., Shijiazhuang 050035, China |
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Abstract In order to expand the research scope of three-stage infrared spectrometry technology (IR spectrum, TD-IR spectrum and 2D-IR spectrum) in the structure and thermal stability of important organic silicon materials (silica gel for column chromatography) , the structure of silica gel for column chromatography was studied by IR spectroscopy. The results show that the infrared absorption modes of silica gel in column chromatography include: Si-O-Si asymmetric stretching vibration mode (υas Si-O-Si) and Si-O-Si symmetric stretching vibration mode (υas Si-O-Si). TD-IR spectra of silica gel in column chromatography were studied. The results show that the frequency and intensity of absorption of in column chromatography change obviously with the increase of temperature. Finally, the two-dimensional infrared (2D-IR) spectra of silica gel as υas Si-O-Si and Si-O-Si were studied.
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