Abstract
A new metal-organic hybrid compound(1) with stuctural phase transition above room temprature has been synthesized. Differential scanning calorimetry(DSC) measurement shows a pair of reversible thermodynamics peaks at 320.5 K(cooling) and 339.5 K(heating) with a large heat hysteresis about 19 K, indicating the compound undergoes a reversible structural phase transition. Dielectric measurement with a step-like dielectric anomaly further confirms the phase transition. The crystal structures of 1, determined at 150 K and 353 K, are both monoclinic in P21/c, suggesting the phase transition is isosymmetric. Temperature-dependent single crystal analyses of 1 reveal that the displacement of zinc atom is mainly responsible for the reversible structural phase transition.
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