1. Win, Y.F., S.G. Teoh, S.T. Ha, L.G.A. Ong and T.S.Tengku-Muhammad, 2011. Synthesis, characterization and cytotoxic assay on human liver carcinoma cells (HepG2) of organodistannoxane dimer complexes derived from alkylaminobenzoic acids. Int. J. Phys. Sci., 6: 1463-1470.
   Direct Link  |  
2. Win, Y.F., E. Yousif, A. Majeed and S.T. Ha, 2011. Synthesis, characterization and in vitro antimicrobial activity of Co(II), Cu(II), Zn(II), Cd(II) and Sn(II) ions with {[5-(4-bromophenyl)-1,3,4-oxadiazol-2yl]thio}acetic acid. Asian J. Chem., 23: 5009-5012.
3. Win, Y.F., C.S. Choong, S.T. Ha, C.S. Yeap and H.K. Fun, 2011. Octabutylbis[µ2-4-(diethylamino)benzoato-κ2O:O']bis[4-(diethylamino)benzoato-κO]di-µ3-oxido-tetratin(IV). Acta Cryst., 67: 1018-1019.
   CrossRef  |  
4. Win, Y.F., C.S. Choong, S.T. Ha, C.K. Quah and H.K. Fun, 2011. (2-Chloro-4-nitrobenzoato)(methanol)triphenyltin(IV). Acta Cryst., 67: 535-535.
   CrossRef  |  
5. Sastry, S.S., S.S. Begum, V.R.K. Murthy, T.V. Kumari and S.T. Ha, 2011. Effect of magnetite nano particles on p-n-alkyl benzoic acid mesogens. Proceedings of the International Conference on Materials for Advanced Technologies, June 26-July 1, 2011, Singapore, pp: 59-.
6. Ong, S.T., W.N. Lee, P.S. Keng, S.L. Lee, Y.T. Hung and S.T. Ha, 2011. Application of response surface analysis for optimization of dyes sorption onto EDTA modified rice hull. Res. J. Chem. Environ., 15: 538-543.
7. Ong, S.T., S.T. Ha, P.S. Keng, C.K. Lee and Y.T. Hung, 2011. Removal of Dyes from Wastewaters by Low-Cost Adsorbents. In: Handbook of Environmental and Waste Management: Air and Water Pollution Control, Hung, Y.T., L.K. Wang and N. Shammas (Eds.). Vol. 1. World Scientific Publishing Co., Singapore.
8. Ong, S.T., P.S. Keng, W.N. Lee, S.T. Ha and Y.T. Hung, 2011. Dye waste treatments. Water, 3: 157-176.
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9. Ong, S.T., E.C. Khoo, P.S. Keng, S.L. Hii, S.L. Lee, Y.T. Hung and S.T. Ha, 2011. Plackett-burman design and response surface methodological approach to optimize basic dyes removal using sugarcane bagasse. Desalin. Water Treat. J., 25: 310-318.
   Direct Link  |  
10. Koh, T.M., S.T. Ha, T.L. Lee, S.L. Lee, G.Y. Yeap, H.C. Lin and R.T. Subramaniam, 2011. Synthesis and mesomorphic evaluation of new calamitic liquid crystals containing benzothiazole core. Chin. Chem. Lett., 22: 619-622.
    CrossRef  |  
11. Ha, S.T., Y.F. Win, S.L. Lee, M.M. Ito, K. Abe, H. Oonishi and G.Y. Yeap, 2011. Synthesis, spectral studies of 4-{[(3-substitutedphenyl)imino]methyl}-3-hydroxyphenyl octadecanoate and effect of meta substituents on mesomorphic properties. Int. J. Phys. Sci., 6: 2507-5217.
    Direct Link  |  
12. Ha, S.T., T.M. Koh, S.T. Ong, F.W. Yip and Y. Sivasothy, 2011. Benzothiazole as Structural Components in Liquid Crystals. In: Liquid Crystalline Organic Compounds and Polymers as Materials 21st Century: From Synthesis to Applications, Iwan, A. and E. Schab-Balcerzak (Eds.). Research Signpost, India, ISBN: 978-81-7895-496-7, pp: 1-17.
13. Ha, S.T., T.L. Lee, G.Y. Yeap, M.M. Ito, A. Saito and M. Watanabe, 2011. Mesomorphic behavior of new azomethine liquid crystals having terminal iodo group. Chin. Chem. Lett., 22: 260-263.
    CrossRef  |  
14. Ha, S.T., T.L. Lee, G.Y. Yeap, H.C. Lin, M.M. Ito and R.T. Subramaniam, 2011. Synthesis and mesomorphic properties of 4-(methylthio)benzylidene-4'-n-alkanoyloxyanilines. Asian J. Chem., 23: 4609-4612.
15. Ha, S.T., T.L. Lee, F.W. Yip, S.L. Lee and G.Y. Yeap, 2011. Synthesis and characterization of new thermotropic liquid crystals derived from 4-Hydroxybenzaldehyde. Proceedings of the International Conference on Applied Science, Engineering and Technology, September 28-30, 2011, World Academy of Science, Engineering and Technology, Singapore -.
16. Ha, S.T., K.L. Foo, R.T. Subramaniam, M.M. Ito, S.S. Sastry and S.T. Ong, 2011. Heterocyclic benzoxazole-based liquid crystals: Synthesis and mesomorphic properties. Chin. Chem. Lett., 22: 1191-1194.
    Direct Link  |  
17. Ha, S.T., G.Y. Yeap and P.L. Boey, 2011. Synthesis and mesomorphic properties of new schiff base liquid crystals, N-[4-(4-n-alkanoyloxybenzoyloxy)-2'hydroxybenzylidene]-4-substituted-anilines. Res. J. Chem. Environ., 15: 677-682.
18. Ha, S.T., G.Y. Yeap and P.L. Boey, 2011. 4-{[(4-fluorophenyl)imino]methyl}-3-hydroxyphenyl 4-(hexadecanoyloxy)benzoate. Molbank, .
    Direct Link  |  
19. Ha, S.T., G.Y. Yeap and P.L. Boey, 2011. 4-{[(4-Methylphenyl)imino]methyl}-3-hydroxyphenyl 4-(Hexadecanoyloxy)benzoate. Molbank, 2011: M738- M738.
    CrossRef  |  
20. Ha, S.T., F.W. Yip, T.M. Koh and Y.T. Chong, 2011. Synthesis and characterization of 4-{[(3-cyanophenyl)imino]methyl}-3-hydroxyphenyl octadecanoate. Aust. J. Basic Applied Sci., 5: 15-19.
    Direct Link  |  
21. Yip, F.W., S.G. Teoh, H.K. Fun, T.S. Tengku-Muhammad, P. Ibrahim and S.T. Ha, 2010. Synthesis, characterization and biological screening activity of organotin(IV) carboxylate complexes derived from 3-(dimethylamino)benzoic acid. Proceedings of the 3rd International Conference for Young Chemists, June 23-25, 2010, Penang -.
22. Win, Y.F., S.G. Teoh, T.S. Tengku-Muhammad, Y. Sivasothy, S.T. Ha, 2010. Synthesis and characterization of organotin(IV) complexes derived of 3-(Dimethylamino)benzoic acid: Cytotoxic assay on human liver carcinoma cells (HepG2). Am. J. Applied Sci., 7: 301-308.
    CrossRef  |  Direct Link  |  
23. Win, Y.F., S.G. Teoh, T.S. Tengku-Muhammad, S.T. Ha and Y. Sivasothy, 2010. Synthesis and structural characterization of organotin (IV) complexes derived of 4-(Dethylamino) benzoic acid: Cytotoxic assay on human liver carcinoma cells (HepG2). Aust. J. Basic Applied Sci., 4: 1383-1390.
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24. Win, Y.F., S.G. Teoh, M.R. Vikneswaran, Y. Sivasothy, S.T. Ha and P. Ibrahim, 2010. Synthesis and characterization or organotin(IV) complexes derived of 3-(dimethylamino)benzoic acid: In vitro antibacterial screening activity. Aust. J. Basic Applied Sci., 4: 5923-5931.
25. Win, Y.F., S.G. Teoh, H.K. Fun, B.M. Yamin, T.S. Tengku-Muhammad and S.T. Ha, 2010. Synthesis, structural characterization and cytotoxic assay on human liver carcinoma cells (HepG2) of organotin(IV) complexes derived of 2-amino-5-nitrobenzoic acid. Aust. J. Basic Applied Sci., 4: 257-264.
    Direct Link  |  
26. Win, Y.F., S.G. Teoh M.R. Vikneswaran, S.T. Ha and P. Ibrahim, 2010. Synthesis and characterization of organotin (IV) complexes derived of 4-(diethylamino) benzoic acid: In vitro antibacterial screening activity. Int. J. Phys. Sci., 5: 1263-1269.
27. Win, Y.F., C.S. Choong, S.T. Ha, J.H. Goh and H.K. Fun, 2010. Octabutylbis(2-2-chloro-5-nitrobenzoato)bis(2-chloro-5-nitrobenzoato)di-3-oxido-tetratin(IV). Acta Cryst., 66: 698-699.
28. Ong, S.T., W.N. Lee, P.S. Keng, S.L. Lee, Y.T. Hung and S.T. Ha, 2010. Equilibrium studies and kinetics mechanism for the removal of basic and reactive dyes in both single and binary systems using EDTA modified rice husk. Int. J. Phys. Sci., 5: 582-595.
    Direct Link  |  
29. Ong, S.T., E.C. Khoo, S.L. Hii and S.T. Ha, 2010. Utilization of sugarcane bagasse for removal of basic dyes from aqueous environment in single and binary systems. Desalin. Water Treat. J., 20: 86-95.
30. Lee, T.L., T.M. Koh, S.T. Ha, G.Y. Yeap, H.C. Lin and P.L. Boey, 2010. Mesomorphic Schiff base esters with benzothiazole core: Synthesis and phase transition studies. Proceedings of the 23rd Malaysian Symposium of Analytical Sciences, October 4-6, 2010, Kuala Terengganu, Terengganu -.
31. Lee, T.L., S.T. Ha, G.Y. Yeap, H.C. Lin and P.L. Boey, 2010. Synthesis and characterization of Schiff base liquid crystals 4-(methylthio)benzylidene-4'-N-alkanoyloxyanilines. Proceedings of the 23rd Malaysian Symposium of Analytical Sciences, October 4-6, 2010, Kuala Terengganu, Terengganu -.
32. Ha, S.T., T.M. Koh, S.L. Lee, G.Y. Yeap and H.C. Lin et al., 2010. Synthesis of new schiff base ester liquid crystals comprising benzothiazole core. Liquid Cryst., 37: 547-554.
    CrossRef  |  Direct Link  |  
33. Ha, S.T., T.M. Koh, G.Y. Yeap, H.C. Lin, Y.F. Win and S.T. Ong, 2010. Heterocyclic Benzothiazole-based liquid crystals: Synthesis and mesomorphic properties. Proceedings of the International Chemical Congress of Pacific Basin Societies, December 15-20, 2010, Honululu, Hawaii, USA -.
34. Ha, S.T., T.M. Koh, G.Y. Yeap, H.C. Lin, S.L. Lee, Y.F. Win and S.T. Ong, 2010. Synthesis and mesomorphic properties of 6-methoxy- and 6-ethoxy-2-(2-hydroxy-4-alkanoyloxybenzylidenamino)benzothiazoles. Mol. Cryst. Liq. Cryst., 528: 10-22.
    CrossRef  |  
35. Ha, S.T., T.M. Koh, G.Y. Yeap, H.C. Lin and S.L. Lee et al., 2010. Mesogenic Schiff base esters with benzothiazole core: Synthesis and phase transition studies. Phase Trans., 83: 195-204.
    CrossRef  |  
36. Ha, S.T., T.L. Lee, T.M. Koh, K.L. Foo and G.Y. Yeap, 2010. Synthesis and mesomorphic properties of new benzothiazole-based liquid crystals. Proceedings of the 23rd Malaysian Symposium of Analytical Sciences, October 4-6, 2010, Kuala Terengganu, Terengganu -.
37. Ha, S.T., T.L. Lee, K.L. Foo, G.Y. Yeap and P.L. Boey, 2010. Synthesis and mesomorphic properties of Schiff base esters 4-n-alkanoyloxybenzylidene-4-iodoanilines. Proceedings of the 3rd International Conference for Young Chemists, June 23-25, 2010, Penang -.
38. Ha, S.T., M.Y. Ng, T.M. Koh and T.L. Lee, 2010. 3-Hydroxy-4-{[(4-bromophenyl)imino]methyl}phenyl octadecanoate. Molbank, .
    Direct Link  |  
39. Ha, S.T., M.Y. Ng, R.T. Subramaniam, M.M. Ito and A. Saito et al., 2010. Mesogenic azomethine esters with different end groups: Synthesis and thermotropic properties. Int. J. Phys. Sci., 5: 1256-1262.
    Direct Link  |  
40. Ha, S.T., L.K. Ong, Y.F. Win, Y. Sivasothy, G.Y. Yeap and P.L. Boey, 2010. The synthesis and characterization of new Schiff bases: 4[(pyridine-4-yl-methylene)amino]phenylalkanoates. Aust. J. Basic Applied Sci., 4: 1146-1151.
    Direct Link  |  
41. Ha, S.T., L.K. Ong, Y.F. Win, G.Y. Yeap, N.L. Bonde and P.L. Boey, 2010. New schiff bases with pyridine core: Spectral, thermal and optical characterizations. Am. J. Applied Sci., 7: 656-660.
    CrossRef  |  Direct Link  |  
42. Ha, S.T., L.K. Ong, Y. Sivasothy, G.Y. Yeap, P.L. Boey and H.C. Lin, 2010. New mesogenic schiff base esters with polar chloro substituent: Synthesis, thermotropic properties and X-ray diffraction studies. Am. J. Applied Sci., 7: 214-220.
    CrossRef  |  Direct Link  |  
43. Ha, S.T., L.K. Ong, Y. Sivasothy and Y.F. Win, 2010. Synthesis of new schiff bases with dialkylamino end groups and effect of terminal branching on mesomorphic properties. World Applied Sci. J., 8: 641-646.
    Direct Link  |  
44. Ha, S.T., L.K. Ong, S.L. Lee, H.C. Lin, Y.F. Win and S.T. Ong, 2010. Synthesis and mesomorphic properties of schiff base esters possessing terminal chloro substituent. Chin. Chem. Lett., 21: 637-640.
    CrossRef  |  
45. Ha, S.T., L.K. Ong, G.Y. Yeap, M.M. Ito, A. Saito, M. Watanabe and S.L. Lee, 2010. Effect of terminal branching on mesomorphism of a homologous series of schiff base ethers. Sci. Res. Essays, 5: 3018-3026.
    Direct Link  |  
46. Ha, S.T., K.L. Foo, T.L. Lee, G.Y. Yeap and P.L. Boey, 2010. Synthesis and mesomorphic behavior of new benzoxazole-based liquid crystals. Proceedings of the 3rd International Conference for Young Chemists, June 23-25, 2010, Penang -.
47. Ha, S.T., K.L. Foo, T.L. Lee and G.Y. Yeap, 2010. Synthesis and liquid crystalline behaviors of new liquid crystals with benzoxazole core. Proceedings of the 23rd Malaysian Symposium of Analytical Sciences, October 4-6, 2010, Kuala Terengganu, Terengganu -.
48. Ha, S.T., J.K. Beh, Y.F. Win and S.T. Ong, 2010. 3-Hydroxy-4-{[(4-ethylphenyl)imino}methyl}phenyl octadecanoate. Molbank, .
    Direct Link  |  
49. Ha, S.T., J.K. Beh, K.L. Foo, T.M. Koh and S.T. Ong, 2010. 3-Hydroxy-4-{[(4-methoxyphenyl)imino]methyl}phenyl octadecanoate. Molbank, .
    Direct Link  |  
50. Ha, S.T., G.Y. Yeap and P.L. Boey, 2010. Synthesis and smectogenic A and C* properties of (S)-(-)-2-methylbutyl 4'-(4''-n-alkanoyloxybenzoyloxy)biphenyl-4-carboxylates. Int. J. Phys. Sci., 5: 182-191.
    Direct Link  |  
51. Ha, S.T., G.Y. Yeap and P.L. Boey, 2010. Mesomorphic properties of biphenyl derivatives with cholesteryl moiety. Int. J. Phys. Sci., 5: 2185-2192.
    Direct Link  |  
52. Ha, S.T., F.W. Yip and K.Y. Thea, 2010. Synthesis and characterization of a new homologous series of benzothiazole ether with lateral methoxy group. World Applied Sci. J., 9: 380-384.
    Direct Link  |  
53. Ha, S.T. and Y.F. Win, 2010. Total assignment of NMR spectral lines of schiff base derivatives with pyridine core. World Applied Sci. J., 8: 1007-1012.
    Direct Link  |  
54. Ha, S.T. and L.K. Ong, 2010. New mesogenic Schiff base esters containing chloro end group: Synthesis and thermotropic properties. World Applied Sci. J., 9: 45-48.
    Direct Link  |  
55. Ong, S.T., E.H. Tay, S.T. Ha, W.N. Lee and P.S. Keng, 2009. Equilibrium and continuous flow studies on the sorption of Congo red using ethylenediamine modified rice hulls. Int. J. Phys. Sci., 4: 683-690.
    Direct Link  |  
56. Ong, S.T., C.K. Lee, Z. Zainal, P.S. Keng and S.T. Ha, 2009. Photocatalytic degradation of basic and reactive dyes in both single and binary systems using immobilized TiO₂. J. Fundam. Sci., 5: 88-93.
    Direct Link  |  
57. Ha, S.T., T.M. Koh, Y.F. Win and S.T. Ong, 2009. 4-[(1,3-Benzothiazol-2-ylimino)methyl]phenyl dodecanoate. Molbank, .
    Direct Link  |  
58. Ha, S.T., T.M. Koh, S.T. Ong, T.L. Lee and Y. Sivasothy, 2009. Synthesis of 2-(4-propyloxyphenyl) Benzothiazole. Molbank, .
    Direct Link  |  
59. Ha, S.T., T.M. Koh, S.T. Ong, T.L. Lee and Y. Sivasothy, 2009. 2-(4-Heptyloxyphenyl) benzothiazole. Molbank, .
    Direct Link  |  
60. Ha, S.T., T.M. Koh, S.T. Ong, J.K. Beh and L.K. Ong, 2009. Synthesis of a new liquid crystal, 3-hydroxy-4-{[(6-methoxy-1,3-benzothiazol-2-yl)imino]methyl}phenyl palmitate. Molbank, .
    Direct Link  |  
61. Ha, S.T., T.M. Koh, S.T. Ong and Y.F. Win, 2009. 2-[4-(Hexadexyloxy)-3-methoxyphenyl]-1,3-benzothiazole. Molbank, .
    Direct Link  |  
62. Ha, S.T., T.M. Koh, S.T. Ong and Y. Sivasothy, 2009. Synthesis and mesomorphic behavior of benzothiazole-based liquid crystals having terminal methoxyl group. Chin. Chem. Lett., 20: 1449-1452.
    Direct Link  |  
63. Ha, S.T., T.M. Koh, S.T. Ong and L.K. Ong, 2009. Synthesis of a new heterocycle with liquid crystal properties: 2-(3-methoxy-4-hexadecanoyloxyphenyl)benzothiazole. Molbank, 2009: M606-M606.
    CrossRef  |  Direct Link  |  
64. Ha, S.T., T.M. Koh, H.C. Lin, G.Y. Yeap and Y.F. Win et al., 2009. Heterocyclic benzothiazole-based liquid crystals: Synthesis and mesomorphic. Liquid Cryst., 36: 917-925.
    CrossRef  |  Direct Link  |  
65. Ha, S.T., T.M. Koh, G.Y. Yeap, H.C. Lin, J.K. Beh, Y.F. Win and P.L. Boey, 2009. New mesogenic schiff base esters comprising benzothiazole moiety: Synthesis and mesomorphic properties. Chin. Chem. Lett., 20: 1081-1084.
    CrossRef  |  
66. Ha, S.T., T.M. Koh, G.Y. Yeap, H.C. Lin and P.L. Boey et al., 2009. Synthesis and mesomorphic properties of 2-(4-alkyloxyphenyl)benzothiazoles. Mol. Cryst. Liquid Cryst., 506: 56-70.
    CrossRef  |  
67. Ha, S.T., S.T. Ong, Y.T. Chong and G.Y. Yeap, 2009. 4-{[(3-Cyanophenyl)imino]methyl}-3-hydroxyphenyl Tetradecanoate. Molbank, .
    Direct Link  |  
68. Ha, S.T., S.T. Ong, Y.T. Chong and G.Y. Yeap, 2009. 4-{[(3-Chlorophenyl)imino]methyl}-3-hydroxyphenyl Myristate. Molbank, .
    Direct Link  |  
69. Ha, S.T., S.T. Ong, Y.T. Chong and G.Y. Yeap, 2009. 3-Hydroxy-4-{[(3-nitrophenyl)imino]methyl}phenyl Tetradecanoate. Molbank, .
    Direct Link  |  
70. Ha, S.T., S.T. Ong, Y.T. Chong and G.Y. Yeap, 2009. 3-Hydroxy-4-[(phenylimino)methyl]phenyl myristate. Molbank, .
    Direct Link  |  
71. Ha, S.T., S.T. Ong, L.K. Ong, F.W. Yip, T.M. Koh and Y. Sivasothy, 2009. Synthesis of 4-[(4-dimethylaminobenzylidene)amino]phenyl tetradecanoate. Molbank, Vol. 2 .
    Direct Link  |  
72. Ha, S.T., L.K. Ong, Y.F. Win, T.M. Koh and G.Y. Yeap, 2009. 4-[(Pyridin-3-ylmethylene)amino]phenylhexadecanoate. Molbank, .
    Direct Link  |  
73. Ha, S.T., L.K. Ong, S. Yasodha, G.Y. Yeap and H.C. Lin et al., 2009. Mesogenic schiff base esters with terminal chloro group: Synthesis, thermotropic properties and X-ray diffraction studies. Int. J. Phys. Sci., 5: 564-575.
    Direct Link  |  
74. Ha, S.T., L.K. Ong, J.P.W. Wong, Y.F. Win, T.M. Koh, 2009. Synthesis of new Schiff base ether: Ρ-n-(dimethylamino)benzylidene-Ρ-dodecyloxyaniline. Molbank, .
    Direct Link  |  
75. Ha, S.T., L.K. Ong, J.P.W. Wong, G.Y. Yeap, H.C. Lin, S.T. Ong and T.M. Koh, 2009. Mesogenic Schiff's base ether with dimethylamino end group. Phase Trans,, 82: 387-397.
    CrossRef  |  
76. Ha, S.T., G.Y. Yeap and P.L. Boey, 2009. Synthesis and liquid crystalline properties of new Schiff bases N-[4-(4-n-alkanoyloxybenzoyloxy)benzylidene]-4-cyano-, 4-hydroxy-, 4-thio-and 4-nitroanilines. Aust. J. Basic Applied Sci., 3: 3417-3422.
    Direct Link  |  
77. Ha, S.T., L.K. Ong, S.T. Ong, G.Y. Yeap and J.P.W. Wong et al., 2009. Synthesis and mesomorphic properties of new Schiff base esters with different alkyl chains. Chin. Chem. Lett., 20: 767-770.
    CrossRef  |  
78. Win, Y.F., S.G. Teoh, S.T. Ha, R. Kia and H.K. Fun, 2008. [3-(dimethylamino)benzoato]triphenyltin(IV). Acta Cryst., E64: m1530-m1531.
    Direct Link  |  
79. Ha, S.T., T.M. Koh, G.Y. Yeap, P.L. Boey and W.A.K. Mahmood, 2008. Synthesis and liquid crystalline behaviors of 2-(4-alkyloxyphenyl)benzothiazoles. Proceedings of the Penang International Conference for Young Chemists, June 18-20, 2008, Penang -.
80. Ha, S.T., L.K. Ong, Y.F. Win, T.M. Koh and G.Y. Yeap, 2008. Synthesis of new schiff base: 4-[(Pyridin-3-ylmethylene)amino]phenyldodecanoate. Molbank, .
    Direct Link  |  
81. Ha, S.T., J.P.W. Wong, L.K. Ong, G.Y. Yeap and P.L. Boey, 2008. Synthesis and mesomorphic properties of Schiff base ethers 4-(Dimethylamino)benzylidene-4'alkyloxyanilines. Proceedings of the Penang International Conference for Young Chemists, June 18-20, 2008, Penang -.
82. Yeap, G.Y., S.T. Ha, P.L. Lim, P.L. Boey and M.M. Ito et al., 2006. Nematic and smectic A phases in ortho-hydroxy-para-hexadecanoyloxybenzylidene-para-substituted anilines. Mol. Cryst. Liq. Cryst., 452: 63-72.
    CrossRef  |  
83. Yeap, G.Y., S.T. Ha, P.L. Boey, W.A.K. Mahmood and M.M. Ito et al., 2006. Synthesis and characterization of some new mesogenic Schiff base esters N-[4-(4-n-hexadecanoyloxybenzoyloxy)benzylidene]-4-substitued anilines. Mol. Cryst. Liq. Cryst., 452: 73-90.
    CrossRef  |  
84. Yeap, G.Y., S.T. Ha, P.L. Boey, M.M. Ito and S. Sanehisa et al., 2006. Synthesis, physical and mesomorphic properties of schiff base esters containing ortho-, meta- and para-substituents in benzylidene-4'-alkanoyloxyanilines. Liq. Cryst., 33: 205-211.
    CrossRef  |  
85. Ha, S.T., Yeap, G.Y., P.L. Boey, W.A.K. Mahmood, D. Takeuchi and M. Yuta, 2005. Synthesis and liquid crystalline properties of chiral derivatives containing biphenyl-4-carboxylate core. Proceedings of the 1st USM LCRL-Japan Liquid Crystals Colloquium, December 1-2, 2005, Penang -.
86. Ha, S.T., G.Y. Yeap, P.L. Lim, P.L. Boey, W.A.K. Mahmood and M.M. Ito, 2005. Synthesis of new mesogenic schiff base esters 2-hydroxy-4-methoxy-, 2-hydroxy-3-methoxy- and 3-methoxy-4-alkanoyloxybenzylidene-4'-alkanoyloxyanilines. Proceedings of the National Workshop on Ferroelectric Liquid Crystal: Physics and Applications, April 24-26, 2005, Kuala Lumpur -.
87. Yeap, G.Y., S.T. Ha, Y. Nakamura, P.L. Boey and W.A.K. Mahmood et al., 2004. Fourier transform infrared and conformational analysis of cholesteryl 4-n-alkoxybenzoates in solution. Spectrosc. Lett., 37: 319-336.
    CrossRef  |  
88. Yeap, G.Y., S.T. Ha, P.L. Lim, P.L. Boey and W.A.K. Mahmood et al., 2004. Synthesis and mesomorphic properties of Schiff base esters ortho-hydroxy-para-alkyloxybenzylidene-para-substituted anilines. Mol. Cryst. Liq. Cryst., 423: 73-84.
    CrossRef  |  
89. Yeap, G.Y., S.T. Ha, M.M. Ito, P.L. Boey and W.A.K. Mahmood, 2004. Synthesis, fourier transform infrared, 1D and 2D NMR spectral studies on the conformation of two new cholesteryl 4-alkoxyphenyl-4'-benzoates. J. Mol. Struct., 687: 57-64.
    CrossRef  |  
90. Ha, S.T., G.Y. Yeap, Y. Nakamura, P.L. Boey and W.A.K. Mahmood et al., 2004. Structural analysis of cholesteryl 4-n-alkoxybenzoates in solution by using multinuclear magnetic resonance. Proceedings of the Regional Conference for Young Chemists, April 13-14, 2004, Penang -.
91. Ha, S.T., G.Y. Yeap, P.L. Lim, P.L. Boey, W.A.K. Mahmood, M.M. Ito and S. Sanehisa, 2004. Synthesis and characterization of some mesogenic schiff base esters Ortho-Hydroxy-Para-Alkyloxybenzylidene-Para-Substituted-Anilines. Proceedings of the Regional Conference For Young Chemists 2004, April 13-14, 2004, Penang -.
92. Yeap, G.Y., S.T. Ha, N. Ishizawa, K. Suda, P.L. Boey and W.A.K. Mahmood, 2003. Synthesis, crystal structure and spectroscopic study of para substituted 2-hydroxy-3-methoxybenzalideneanilines. J. Mol. Struct., 658: 87-99.
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93. Ha, S.T., G.Y. Yeap and P.L. Boey, 2003. Synthesis, spectroscopic and mesomorphic properties of cholesteryl 4-alkoxyphenyl-4'-benzoates. Proceedings of the Malaysian Science and Technology Congress, September 23-25, 2003, Kuala Lumpur -.
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