| 变温红外确定硫氰化铵固-固相变机理(英文) |
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| 引用本文： | 李平,武克忠,张建玲,刘晓地.变温红外确定硫氰化铵固-固相变机理(英文)[J].化学研究,2000,11(3):46-48. |
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| 作者姓名： | 李平 武克忠 张建玲 刘晓地 |
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| 作者单位： | 河北师范大学化学系,石家庄 050016 |
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| 基金项目： | 河北省教委科研项目，97116， |
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| 摘 要： | 硫氰化铵分子晶体在固 固转变时 ,能可逆地吸收大量的热。作者利用变温红外光谱确定了其固 固相变机理。结果表明 ,随着温度升高 ,固 固转变时分子晶体内相邻的氢键断裂 ,晶型由低对称转变为高对称并引入振动和转动无序 ,吸收大量热。
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| 关 键 词： | 硫氰化铵 固固相变 红外光谱 |
| 文章编号： | 1008-1011(2000)03-0046-03 |
| 修稿时间： | 2000年1月20日 |
Determinate Mechanism of Solid-Solid PhaseTransitions in Ammonium Thiocyanate forInfrared Spectra at Various Temperatures |
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| LI Ping,WU Ke zhong,ZHANG Jian ling,LIU Xiao di.Determinate Mechanism of Solid-Solid PhaseTransitions in Ammonium Thiocyanate forInfrared Spectra at Various Temperatures[J].Chemical Research,2000,11(3):46-48. |
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| Authors: | LI Ping WU Ke zhong ZHANG Jian ling LIU Xiao di |
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| Abstract: | The solid state phase transition in some molecular crystals reversibly absorb large amount of heat.Infrared spectroscopy was performed to determine mechanism on the pure molecular crystals in ammonium thiocyanate,over a range of temperatures including the solid state transformation.Results of these measurements support a mechanism for the solid state transformation which involves reversible breaking of nearestneighbor hydrogen resonance bond in the molecular crystals at the transformation temperatures. |
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| Keywords: | ammonium thiocyanate solid solid phase transition FT IR spectra |
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