Synthesis, spectra, and ferroelectric properties of a series of dihalogenated dopants

A series of ferroelectric dopants of type ArOCH 2 CHXCHY(CH 2 ) 2 CH 3 , where X and Y are either fluorine or chlorine, were investigated. These compounds were evaluated as a 5% mixture in a phenylpyrimidine host. The compounds with at least one fluorine and with syn halogens all had comparable rise times and switching speeds, although the syn-dichloro compound had a significantly slower rise time. The anti-difluoride was also synthesized by an unambiguous route and its properties were contrasted with the syn-difluoride. This contrasting data helped verify the structures of the two compounds.