Correlation between the Transition Temperature and the Rotational Potential Barrier in Plastic Crystals
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概要
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A linear retationship was found between the transition temperature of plastic crystals and potential energy barrier hindering molecular rotation determined below or above the transition point, with the slope of the line 7.5 <B>R</B> and 4.1 <B>R</B>, respectively, where <B>R</B> is the gas constant. Consideration of the distribution of molecules between the librational and the rotational states showed that the transition starts to occur cooperatively when the fraction of the rotating molecules reaches a value of 1/60 and concludes with a value of 1/3. The model gives the entropies of transition which reasonably agree with the observed values.
- 公益社団法人 日本化学会の論文
著者
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Koga Yoshikata
Department Of Chemistry The University Of British Columbia
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Chihara Hideaki
Department Of Chemistr Faculty Of Science Osaka University
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Koga Yoshikata
Department of Chemistry, University of British Columbia
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