A New Chiral Schiff Base with Ferroelectric Property

作者:Li Xiu Zhi; Qu Zhi Rong*; Xiong Ren Gen
来源:Chinese Journal of Chemistry, 2008, 26(11): 1959-1962.
DOI:10.1002/cjoc.200890350

摘要

Reaction of 1,1,1,5,5,5-hexafluoropentane-2,4-dione with (1S,2S)-(-)-1,2-diaminocyclohexane afforded a homochiral Schiff base (1Z,4Z)-2,4-bis(trifluoromethyl)-5a,6,7,8,9,9a-hexahydro-3H-benzo[b][1,4]diazepine (1). Fluorescent analysis showed that it exhibited an intense emission band at 488 nm when the exciting radiation was set at 437 nm. Crystallographic analysis shows that it belongs to chiral space group C(2) with ferroelectric behavior. A typical ferroelectric feature of electric hysteresis loop was obtained, with remanent polarization (Pr) of ca. 0.01 mu C/cm(2) and coercive field (Ec) of 0.27 kV/cm.

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