Odd–Even Effect of Dopant Molecules on Clearing Temperatures of Nematic Liquid-crystal Phases

…, T Inoue, T Watanabe, M Takahashi, S Kohmoto

Index: Kishikawa, Keiki; Haga, Yuri; Inoue, Takahiro; Watanabe, Tomohiro; Takahashi, Masahiro; Kohmoto, Shigeo Chemistry Letters, 2012 , vol. 41, # 11 p. 1465 - 1467

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Abstract

Nematic liquid-crystal phases doped with the novel dopant compounds 1 (C 6 F 5 COO (CH) n OCOC 6 F 5, n= 1–7) and 2 (C 6 H 5 COO (CH) n OCOC 6 H 5, n= 1–7) showed an “opposite odd–even effect” on clearing temperatures. The tendency was exactly opposite to that reported for liquid-crystal dimers. A mechanism is postulated on the basis of the difference in the formation of molecular aggregations of even-and odd-number-dopant ...