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Citation: Sie Tiong Ha, Lay Khoon Ong, Siew Ling Lee, Hong Cheu Lin, Yip Foo Win, Siew Teng Ong. Synthesis and mesomorphic properties of Schiff base esters possessing terminal chloro substituent[J]. Chinese Chemical Letters, ;2010, 21(6): 637-640. doi: 10.1016/j.cclet.2010.01.023 shu

Synthesis and mesomorphic properties of Schiff base esters possessing terminal chloro substituent

a Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Jln Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia;
b Department of Science, Faculty of Engineering & Science, Universiti Tunku Abdul Rahman, Jln Genting Klang, Setapak, 53300 Kuala Lumpur, Malaysia;
c Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia;
d Department of Materials Science & Engineering, National Chiao Tung University, Hsinchu 300, Taiwan, China

Received Date: 25 November 2009

Fund Project: The author (S.T. Ha) would like to thank Universiti Tunku Abdul Rahman (UTAR) for the financial support through UTAR Vote No. 6202/O05 and the Malaysia Toray Science Foundation (UTAR Vote No. 4359/000) for funding this project. L.K. Ong would like to acknowledge UTAR for the award of the research and teaching assistantships.

A homologous series of Schiff base esters, 4-chlorobenzylidene-4'-n-alkanoyloxyanilines, containing even number of carbons at the end groups of the molecules (C_n-1H_2n-1COO-, n=4,6,8,10,12,14,16) were synthesized. The mesomorphic properties were investigated by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). It was found that the end groups of the molecules had an effect on the mesomorphic properties. n-Butanoyloxy was found non-mesogenic, whilst n-hexanoyloxy exhibited monotropic smectic phase. The higher members in this homologous series were enantiotropic smectogens.
- Schiff base esters,
- Smectic A,
- Smectic B,
- Liquid crystal
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