High strength disclinations in the nematic and smectic states of 2,5-bis(4-alkoxybenzoyloxy)- p -benzoquinones |
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| Authors: | Lei Li Ruigang Liu Shuyuan Zhang Zifa Li |
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| Institution: |
a College of Materials and Engineering, Zhengzhou University, Zhengzhou 450052, PR China.
b State Key Laboratory of Polymer Physics and Chemistry, Center of Molecule Science, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100080, PR China.
c Department of Chemistry, Zhengzhou University, Zhengzhou, 450052, PR China. |
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| Abstract: | High strength disclinations were observed in both nematic and smectic phases exhibited by members of the 2,5-bis(4-alkoxybenzoyloxy)- p -benzoquinone series, beyond 4- n -pentoxy. The shorter members of the series show only a nematic mesophase, the highest members only a smectic mesophase, while intermediate members exhibit both types of mesophase. These high strength disclinations seen in a single component system are very stable due to energy dispersion and the high viscosity of the smectic state. All the high strength disclinations are negative in sign. |
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