期刊
JOURNAL OF FLUORINE CHEMISTRY
卷 127, 期 4-5, 页码 610-619出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jfluchem.2005.11.015
关键词
cholestane derivatives; hypervalent compounds; liquid crystals; mesogens; steroids; sulfur fluorides
New liquid crystals with a pentafluorosulfanyl function as their polar terminal group were prepared and fully characterized. The synthetic key step was the triethyl borane-catalyzed addition of SF5Br to a suitable olefin precursor, followed by dehydrobromination. The most interesting characteristic of the new materials is their combination of high polarity (Delta epsilon) with very low birefringence (Delta n), which is of particular importance for LCDs for mobile applications. (C) 2005 Elsevier B.V. All rights reserved.
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