Citation: Guan Yeow Yeap, Tze Nee Chan, Wan Sinn Yam, Daisuke Takeuchi, Masato M. Ito. Influence of bromoalkyloxy side chain on mesomorphic behavior in heterocyclic 7-(4-bromoalkyloxy)-3-(4'-decyloxyphenyl)-4H-1 -benzopyran-4-ones[J]. Chinese Chemical Letters, ;2011, 22(8): 947-950. doi: 10.1016/j.cclet.2011.03.006 shu

Influence of bromoalkyloxy side chain on mesomorphic behavior in heterocyclic 7-(4-bromoalkyloxy)-3-(4'-decyloxyphenyl)-4H-1 -benzopyran-4-ones

a Liquid Crystal Research Laboratory, School of Chemical Sciences, University Sains Malaysia, 11800 Minden, Malaysia;
b Chemical Resources Laboratory (Mailbox R1-03), Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan;
c Department of Environmental Engineering for Symbiosis, Faculty of Engineering, Soka University, Hachioji, Tokyo 192-8577, Japan

Received Date: 16 November 2010

Fund Project: The authors would like to thank Universiti Sains Malaysia for USM RU Grants (No. 1001/PKIMIA/811127 and 1001/PKIMIA/811140). Chan T.-N. would like to acknowledge USM for the research fellowship.

A new homologous series of isoflavone-based ethers, 7-(4-bromoalkyloxy)-3-(4'-decyloxyphenyl)-4H-1-benzopyran-4-ones were synthesized and characterized. The mesomorphic properties of all homologues were investigated by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). Enantiotropic smectic A (SmA) phase was observed for all homologues. The structure-property study was carried out by comparing the mesomorphic behavior of the homologues with those previously reported analogues. The bromine atom from the alkyloxy side chain of the benzene ring fused to the heterocyclic moiety was found to be capable of changing the mesomorphic properties.
- Heterocyclic,
- Isoflavone,
- Enantiotropic
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