Electrical properties in disk-like phenylene derivative in crystalline state

We investigated electrical properties of disk-like phenylene derivatives embedded with dipoles (N,N′,N″-tri-n-octyl-1,3,5-benzenetricarboxamide (TOB)). Our experimental results revealed that TOB exhibited ferroelectric and pyroelectric properties in a crystalline state. Remnant displacement and coercive field were 10.5 mC/m2 and 14 MV/m, respectively, at 293 K by displacement–field hysteresis loop. Dielectric anomaly, associated with ferroelectric–paraelectric phase transition, was observed at 370 K. The pyroelectric signal of about β = 3.1 μC/m2 K was recorded at temperatures below the phase transition point.