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A novel type of banana liquid crystals based on 1-substituted naphthalene-2,7-diol cores

2003; Royal Society of Chemistry; Volume: 13; Issue: 9 Linguagem: Inglês

10.1039/b302005c

1364-5501

Jiřı́ Svoboda, Vladimı́ra Novotná, Václav Kozmı́k, Milada Glogarová, W. Weißflog, Siegmar Diele, G. Pelzl,

Synthesis and Properties of Aromatic Compounds

The effect of lateral 1-substitution in naphthalene-2,7-diol with CH3, CN and Cl on mesomorphic properties is studied. DSC and X-ray diffraction, texture observation and dielectric measurements have been performed. For the non-substituted core the high-temperature BX phase and the B4 phase occur while in CH3 and Cl substituted compounds the B2 phases are found. In the CN derivatives, besides the crystalline-like phase N, the phase transition between the chiral B2 and racemic B2 phases is observed.