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題名 | Intermolecular Interactions in Aqueous Dimethyl Sulphoxide and Acetic Acid Probed by High-Pressure FTIR |
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作者姓名(中文) | 馮俊敏; 高祥恩; 蘇致嘉; 江志強; 林聖賢; 張海舟; | 書刊名 | Journal of the Chinese Chemical Society |
卷期 | 49:5 2002.10[民91.10] |
頁次 | 頁663-667 |
分類號 | 343.38 |
關鍵詞 | Pressure; Infrared; Spectroscopy; |
語文 | 英文(English) |
英文摘要 | The infrared spectra of DMSO/D2O and CH3COOD/D2O were measured under various concentrations and pressure. The frequencies of the C-H stretching vibration bands for DMSO/D2O mixtures increase with increasing the mole fraction of D2O, implying the contraction of the C-H bonds. As the pressure was elevated to 1.5 GPa, the C-H vibrations of DMSO/D2O were altered into four bands at ~2927 cm-1, ~2941 cm-1, ~3007 cm-1, and ~3025 cm-1. Further concentration-dependent studies indicated that the spectral features at ~2941 cm-1 and ~3036 cm-1 arise from pressure-induced C-H---O hydrogen bonding between C-H in DMSO and oxygen atom in D2O. Ab in itio calculations were performed, while the calculated results are consistent with the interpretations based on the high-pressure infrared experiments. Analogous to DMSO/D2O, the pressure-dependent studies on CH3COOD/D2O mixtures provide the evidence of the C-H---O hydrogen bonding as the pressure was elevated. |
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