Cooperativity of dynamics of 18-crown-6 molecule forming one-dimensional chain in Cs2(18-crown-6)3[Ni(dmit)2]2
作者： Satoaki Ikeuchi , Yuji Miyazaki , Sadamu Takeda , Tomoyuki Akutagawa , Sadafumi Nishihara
DOI: 10.1063/1.1979481
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摘要: Heat capacity of Cs2(18-crown-6)3[Ni(dmit)2]2 was measured by adiabatic calorimetry. A broad thermal anomaly observed around 225K. The entropy gain (about 52JK−1mol−1) is much larger than that expected for twofold disordering 18-crown-6 assumed in the previous structure analysis. shape qualitatively explained a linear Ising model developed cooperative polymers. molecules forming one-dimensional chain crystal are orientationally disordered with moderate cooperativity.
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