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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 4, Number 3
March 20, 1983 

Synthesis and Properties of Thermotropic Compounds with Two Terminal Mesogenic Units and a Central Spacer (Ⅱ). Homologous Series of α, ω-Bis (4-p-substituted phenoxycarbonyl)phenoxyalkeanes
Jung-Il Jin, Yong-Seog Chung, R. W. Lenz, C. Ober
Two series of thermotropic compounds were prepared and their thermal and liquid crystal properties were examined by differential scanning calorimetry and on the hot-stage of a cross-polarizing microscope. The first series of the compounds has two terminal mesogenic units based on unsubstituted and substituted p-(phenoxycarbonyl) phenyl ethers bracketing a central decamethylene spacer, and the second has 4-(p-phenylphenoxycarbonyl) phenyl ether moiety as the two terminal mesogenic units and central polymethylene spacers of varying lengths. A thermodynamic analysis of the phase transitions was made and explained in relation to structures and thermotropic behavior of the compounds.
143 - 148
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