A high-temperature supramolecular-based switchable dielectric material with electrical bistability between high and low dielectric states

摘要: One new hybrid supramolecular-based phase transition compound TAPC containing macrocycle stator with electrical bistability between high and low dielectric states (TAPC = [(TAP-NH3)·(18-crown-6)·0.5(H2O)]·2(ClO4) (1), TAP-NH3 4-ammonio-2,2,6,6-tetramethylpiperidinium) has been prepared characterized by variable-temperature crystal structure determination, elemental analysis, differential scanning calorimetry (DSC) temperature-dependent spectroscopy. The DSC measurement showed a pair of sharp peaks at 357 K (heating) 322 (cooling), indicating that undergoes reversible first-order transition. structures obtained 293 368 are both monoclinic in the P21/m space group. most distinct difference room-temperature high-temperature is order–disorder ClO4− anions displacement guest water molecules, which driving forces (two incentives synergistically induced transition). This functional moiety could be cation/anion or molecule solely, observed lot compounds, very few them belong to collaborative type (order–disorder motion displacement) transitions. In addition, large thermal hysteresis 37.2 contributes widely tunable states. Such distinctive performance suggests 1 might potential switchable material.