The trifluoromethoxy end - group favors for the formation of smectic phase.
三氟甲氧基有利于近晶相.
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Two - ring liquid crystal compounds exhibited no mesogenic phase or only a monotropic smectic A phase.
其中二環(huán)系液晶化合物不顯示液晶相或僅顯示單邊近晶A相.
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