| 氟氢化钾固-固相变的变温红外光谱测定 |
| IR Spectra at various Temperatures for Potassium Hydrogen Difluoride |
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| 摘要: |
| 关键词: 氟氢化钾 固-固相变 变温红外光谱 |
| 基金项目: 河北省教委专项科研项目(No.97116). |
| Abstract: The solid-solid phase transition of KHF2 was studied by infrared spectrometry at various temperatures and by differential scanning calorimetry(DSC) also.There are hydrogen bonds between the molecules which play a dominant role to the structure at low temperature state.In the temperature range closely corresponding to the solid-solid phase transition, the frequency of antisymmetric stretching(v3) shifted to a higher wavenumber, and the bending (v2) to lower wavenumber.The enthalpy and the temperature of solid-solid phase transition for KHF2 were measured by DSC method and the latter is consistent with the result of IR which could declare the mechanism of solid-solid phase transition of KHF2.With the breaking of hydrogen bonds between the molecules and the introduction of vibrational and rotational disorder KHF2 exhibited crystalline transition. |
| Keywords: potassium hydrogen difluoride solid-solid phase transition IR spectra at various temperatures |
| 投稿时间：2000-12-04 修订日期：2001-02-26 |
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| 武克忠,左萍,张建玲,刘晓地.氟氢化钾固-固相变的变温红外光谱测定[J].无机化学学报,2001,17(3):435-438. |
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