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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 44, Number 2
JKCSEZ 44(2)
April 20, 2000 

The Effect of Substituents on LC Behavior of Bis(p-substituted phenyl) 2-Decyloxyterephthalate

Bis(p-substituted phenyl) 2-decyloxyterephthalate의 액정 특성에 대한 치환기 효과
Joo-Hoon Park*, Jong-Kyu Lee, Ok-Byung Choi, Bong-Keun So, Soo-Min Lee, Jun-Woo Lee, Jung-Il Jin

박주훈, 이종규, 최옥병, 소봉근, 이수민, 이준우, 진정일
비스(파라-치환페닐)테레프탈산 에스테르의 중앙 테레프탈산 벤젠고리 측면에 데실옥시기가 결합하고 있는 열한개의 새로운 화합물을 합성하였고, 이들의 열적 및 액정 성질을 DSC와 가열판이 부착된 편광현미경을 사용하여 조사하였다. 메소겐의 말단 치환기 X= -H(II-H), -F(II-F),-Cl(Il-Cl),-Br(Il-Br),-I(II-I),-NO2(lI-NO2), -CF3(II-CF3),-OC2H5(II-OC2H5),-OC4H9(II-OC4H9),-CN(II-CN) 및 -C6H5(Il-C6H5)로 바꾸었다.II-OC2H5,II-OC4H9, 및 II-C6H5는 단방성 네마틱 액정이었으며,II-H,lI-F,II-Cㅣ,Il-Br,II-I,II-NO2,II-CF3, 및 Il-CN은 액정이 아니었다.

Eleven new compounds that are composed of bis(p-substituted phenyl) terephthalate unitand the decyloxy pendant as lateral were synthesized and their thermal and liquid crystalline properties were studied by the differential scanning calorimetry (DSC) and on a hot-stage of a polarizing microscope. The ter-minal substituent groups of the compound were varied;X= -H(II-H),-F(lI-F),-CII(II-CI),-Br(ll-Br),-I(II-I),-NO2(II-NO2),-CF3(lI-CF3),-OC2H5(II-OC2H5),-OC4H9(II-OC4H9),-CN(II-CN) and -C6H5(ll-Br,II-I,lI-NO2,II-CF3, and II-CN did not show liquid crystalline properties.

127 - 137
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