High-temperature structural phase transition coupled with dielectric switching in an organic-inorganic hybrid crystal: [NH3(CH2)2Br]3CdBr5.

摘要: Molecular bistable switches (electrical “ON” and “OFF”) represent a class of highly desirable intelligent materials due to their sensitive switchable responses, simple environmentally friendly processing, light weight, mechanical flexibility. In particular, these above room temperature with potential practical application are rarely reported. this work, new zigzag chained organic–inorganic hybrid compound [NH3(CH2)2Br]3CdBr5 (1), which displays rapidly dielectric switching reversibility remarkable antifatigue, has been successfully synthesized. Systematic characterization including differential scanning calorimetry measurements (DSC), measurements, variable-temperature structural analyses was performed reveal the phase transition 1. A couple reversible heat anomaly peaks at 335.6/323.8 K large hysteresis (ca. 11.8 K) were observed in DSC curve, indicating first-order type transition. 1 exhibits an obvious around 327 K, makes material. Variable-temperature show that cationic order–disorder motion is main attribution for