A New Type of Organic Ferroelectric Material Based on Maleopimaric Acid Anhydride
In this paper, maleopimaric acid anhydride (MPA) has been synthesized by the Diels-Alder addition reaction between abietic acid and maleic anhydride. Single crystal X-ray diffraction analysis reveals that MPA crystallizes in the polar space group P21 and contains one MPA and one DMF (Dimethylformamide) molecule in the asymmetric unit. MPA is firstly found to be a new type of low-molecular-mass organic ferroelectric with the saturation spontaneous polarization (Ps) about 60.0-61.6 μC·cm-2 for single crystal samples, which is close to that of typical inorganic ferroelectric materials. MPA·DMF also shows second-order NLO property, with the second harmonic generation (SHG) responses approximately 0.5 times that of urea.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
Y. Sui et al., "A New Type of Organic Ferroelectric Material Based on Maleopimaric Acid Anhydride", Advanced Materials Research, Vols. 239-242, pp. 1180-1183, 2011