Additional Lines in the K Series of Molybdenum and the by Davis B., Purks H.

By Davis B., Purks H.

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It is seen that for a field of 43 V m−1 the clearing temperature can be enhanced by 9 K with respect to the clearing temperature of the field-free situation. In the mean time the same effect was observed for several other bent-core compounds derived from different classes of substances. 5 and 5K. For example, the transition temperature SmCP – I of the six-ring N-benzoylpiperazine derivative 17c (Table 1-12) could be increased up to 5 K (40 V m−1 ) [54]. For the laterally substituted azomethine compound 44 T = 3 K (30 V m−1 ) was measured [35].

In the binary system A/G of the bent-core compound 30 (mixing component A) and an amphiphilic glycolipid (dodecyl- -D-glucopyranoside) 36 (mixing component G) the SmCPA phase remains stable up to 60 wt% glycolipid. HO HO HO O OH O C H 12 25 36 (Mixing component G) Cr 80 SmA 142 I Interestingly, the spontaneous polarization is unaffected even when it is diluted up to 60% lipid. On the other hand, at higher concentrations of the lipid G a SmA phase exists. It shows at lower temperature a linear electro-optical switching (up to 98% lipid) which is not observable in the SmA phase of the pure lipid.

60]. O O O O O O O O H19C9O OC9H19 22 Cr 149 Colr 197 N 217 I 26 Pelzl and Weissflog In 2000 Amaranatha Reddy et al. [61] presented three series of bent-core compounds with a central naphthalene ring. The homologues show different phase sequences depending on the lateral substituents and the length of the terminal chains. It is seen from Table 1-17 that seven compounds exhibit the dimorphism Colr –N. For two homologues the sequence Col–B6 –N was observed for the first time. The B6 phase is an intercalated SmC phase formed by bent molecules [12].

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