Synthesis and study of azo dye compounds: variation of mesogenic behaviour with length of alkyl chains |
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| Authors: | Long-Li Lai Corresponding author Feng-Ya Su Chen-Hsiung Hung |
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| Institution: | 1. Department of Applied Chemistry , National Chi Nan University , Puli, Taiwan 545, ROC;2. Department of Chemistry , National Changhua University of Education , Changhua, Taiwan 500, ROC |
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| Abstract: | The mesogenic behaviours of two azo dye liquid crystals, 1 and 4, differ because of the different length of terminal alkyl chains; azo dye 1 shows a SmB phase, azo dye 4 shows nematic and SmA phases during thermal processing. The molecular stackings of these two azo dye liquid crystals are compared on the basis of crystallographic studies to explain such unexpected mesogenic behaviour. |
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