| 초록 |
Two series of bended liquid crystal were synthesized , whose structures were containing 1,3-dioxypropylene flexible spacer between mesogens (azo and imine group). Also, the liquid crystalling properties in regard to the length changes of the terminal chains was investigated in this research. The Azo (1An) series were prepared from epichlorohydrin and phenolic compounds containing azo group, and the imine (1Sn) series prepared from dialdehyde and amine compounds. The structure of compounds derived from each reaction step were confirmed using IR and NMR spectroscopy before the next reaction. The structure of the final products were also characterized using IR and NMR spectroscopy. The terminal properties and the liquid crystalline phases of these compounds were measured using the DSC and optical polarizing microscopy. |
