Synthesis and Phase Transition Behavior of Novel Liquid Crystal Tetramers

Narumi, Tsuyoshi; Yoshizawa, Atsushi; Yamamoto, Jun; Takanishi, Yoichi

doi:10.1080/15421400903065739

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…These molecules exhibit a remarkable odd-even effect in their transition properties, which depends on the length and parity of the flexible spacer. The structure property relationships in LC trimers and tetramers have been studied by a number of researchers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], and we have also studied odd-even effects in LC trimers (1) [21] and tetramers (2) [22]. The molecules (1) and (2) contain two kinds of flexible spacers, namely O(CH 2 ) m O and COO(CH 2 ) n O groups.…”

Section: Introductionmentioning

confidence: 99%

Effects of combining of different flexible spacers in liquid crystal trimers and tetramers on transition properties

Itahara

2010

Liquid Crystals

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Liquid crystal trimers and tetramers containing two kinds of flexible spacers, namely O(CH 2 ) m O and COO(CH 2 ) n O, were divided into four classes according to the odd/even nature of the number of atoms in the flexible spacers: specifically, even-even, odd-odd, even-odd, and odd-even trimers, and even-even-even, odd-odd-odd, odd-even-odd, and even-odd-even tetramers. The transition properties of the four types of trimers and of tetramers were compared. Although the nematic-isotropic transition temperature and the associated entropy changes were primarily related to the number of the even-membered flexible spacers in these molecules, the different combinations of the flexible spacers significantly affected their transition properties.

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