Journal Title
Title of Journal: J Chem Crystallogr
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Abbravation: Journal of Chemical Crystallography
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Authors: ShanShan Yu Hui Zhang HaiBao Duan
Publish Date: 2014/07/19
Volume: 44, Issue: 8, Pages: 415-420
Abstract
A new Schiff base iodides with a formula of oOHBz1APyI have been synthesized and characterized structurally oOHBz1APy+ = orthohydroxybenzylidene1aminopyridinium Schiff base derivative 1 Two adjacent cations adopt an antiparallel arrangement forming πtype cation dimmer along the aaxis direction the cation dimmer formed irregular cation stacks and counterion I− anions are embedded in the cation stacks in the crystals of 1 A strong frequency dispersion of ε’ is observed in the low frequency region and can be attributed to local dipole motion in 1 Furthermore this ionpair compound shows novel dielectric phase transition around 125 °C DSC measurement of 1 exhibited gradual endothermic peak around the transition temperature and small enthalpy change means that the difference in lattice energy between the two phases is very small This study provided a new strategy for the design of dielectric phase transition system
Keywords:
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