在電性實驗方面SmC相及SmCa相能觀察到兩種不同的光學性質區塊(domain)，旋轉樣品時兩區塊顏色互換，且SmC在增加電場強度時有顏色變化，SmCa相增加電場時類似pitch band的紋路減少，N相在較高溫時增加電場出現顏色變化，在較低溫時增加電場顏色變化不明顯，且出現擾動現象。 Ten series of hockey stick molecules were synthesized with different ethyleneoxy side chains and aromatic cores. Mesophase properties of these hockey stick mesogens were studied by polarizing optical microscopy, differential scanning calorimetry, powder X-ray diffraction, and electric field effect.
As compared with the meta-positioned hydrocarbon chain analogues, the ethyleneoxy derivatives exhibited slightly smaller mesophase ranges, mainly due to the narrowing of the smectic phase thermal ranges. For the ether and ester linked ethyleneoxy side chain derivatives, ester linked derivatives showed appreciable lowering of melting point but without anticlinic smectic phase.
The optical and electric-field effect of the synclinic and anticlinic smectic phases, SmC and SmCa, resemble those of known hockey stick mesogens, i.e., two types of domains with opposite tilting directions and color exchange with opposite rotation of sample. Color of the SmC changed with increasing electric field strength, the pitch-band-like lines of the SmCa domains diminished with field strength.
Smectic B phase existed, from X-ray diffraction and optical appearance, for two of the newly synthesized four-ring skeleton hockey stick mesogens.
