PUBLICATIONS

Book/Chapter/Invited Article

G.Y.Yeap et al.

Research at Universiti Sains Malaysia, Volume 5. Materials: From Fundamentals to Applications Penerbit USM (2005)

C.T.Imrie, P.A.Henderson and G.Y.Yeap

Liquid crystal oligomers: going beyond dimers. Liquid Crystals, 36, Nos. 6-7, 755-777 (2009)

International Refereed Journals

G.Y.Yeap, H.K.Fun, S.B.Teo and S.G.Teoh

Structure of 1-(2-methyl-2,3-dihydrobenzothiazol-2-yl)-2-propanone, Acta Cryst., C47, 1347-1348 (1991)

H.K.Fun, S.B.Teo, S.G.Teoh, G.Y.Yeap and T.S.Yeoh

Structure of dichloro[1-[(4-methoxyphenylimino)methyl]-2-naphtholato]diphenyl-tin(IV), Acta Cryst., C47, 1602-1604 (1991)

H.K.Fun, S.B.Teo, S.G.Teoh and G.Y.Yeap

The 1:1 molecular adduct of triphenyltin chloride with 2-(m-methylphenyliminomethyl)phenol, [SnCl(C6H5)3(C14H13NO)], Acta Cryst., C47, 1824-1826 (1991)

H.K.Fun, S.B.Teo, S.G.Teoh and G.Y.Yeap

Dichloro{1-[(2-methylphenylimino)methyl]-2-naphtholato}diphenyltin(IV): a 1:1 molecular adduct formed by the interaction of diphenyltin(IV) dichloride with N-(o-substituted phenyl)-2-hydroxynaphthylmethyleneimine

Acta Cryst., C47, 1845-1847 (1991)

S.G.Teoh, S.B.Teo, G.Y.Yeap and J.P.Declercq

The coordinative interaction of a diorganotin dihalide with N-(meta-substituted phenyl)-2-hydroxynaphthalideneimine

Polyhedron, 10(23/24), 2683-2686 (1991)

S.G.Teoh, S.B.Teo, G.Y.Yeap and J.P.Declercq

Synthesis and crystal structure of chlorotriphenyl-1-[(4’-methoxyphenylimino)-methyl]-2-naphtholtin(IV)

 J.Coord.Chem., 25, 327-333 (1992)

S.G.Teoh, S.B.Teo, G.Y.Yeap and J.P.Declercq

Synthesis of stannate(IV) complexes: [LH+]2[SnCl6]2-, [LH+]2[Me4Sn2Cl6]2- and [LH+]2[Ph2SnCl4]2- (LH+ = protonated benzalideneaniline Schiff bases). Crystal structure of the tetrachlorodiphenylstannate(IV) salt [L’H]2[Ph2SnCl4]2- {L’ = N-(4-hydroxy-benzalidene)-4-methoxyaniline}, derived from phenyltin trichloride and L’

Polyhedron, 11(18), 2351-2356 (1992)

S.G.Teoh, S.B.Teo, G.Y.Yeap and H.K.Fun

Complex salts derived from the reactions of Me2SnCl2 with some aromatic Schiff bases. Crystal structure of bis[N-(2-methoxy-1-naphthalidene)-3-methoxy-anilinium] hexachlorotetramethyldistannate(IV) dihydrate: [CH3OC10H6CH:NHC6H4OCH3]2[(CH3)4Sn2Cl6][H2O]2

 J.Organomet.Chem., 439, 139-146 (1992)

International Refereed Journals

G.Y.Yeap, C.L.Gan, H.K.Fun, O.Shawkataly and S.G.Teoh

Structure of 2-[(3-nitrophenylimino)methyl]phenol

Acta Cryst.,C48, 1143-1144 (1992)

G.Y.Yeap, H.K.Fun, S.B.Teo and S.G.Teoh

Structure of [N-(2-mercaptophenylsalicylideneaminato-N,O,S]dimethyltin(IV)

Acta Cryst.,C48, 1109-1110(1992)

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G.Y.Yeap, H.K.Fun, S.B.Teo and S.G.Teoh

Structure of 2-[(4-methylphenylimino)methyl]-1-nitrobenzene

Acta Cryst.,C48, 1898-1900 (1992)

G.Y.Yeap, H.K.Fun, S.G.Teoh, S.B.Teo, K Chinnakali and B.C.Yip

Structure of 4-[(4-methoxyphenylimino)methyl]phenol

Acta Cryst., C48, 2257-2258 (1992)

S.G.Teoh, S.B.Teo, G.Y.Yeap and H.K.Fun

Concomitant C-N and C-S bond cleavages and C-S bond formation at exocyclic carbon of 2-(2’-hydroxynaphthyl)benzothiazoline induced by di-n-butyltin dichloride

Main Group Metal Chem.,15(1), 19-29 (1992).

S.G.Teoh, S.B.Teo, G.Y.Yeap, H.K.Fun and P.J.Smith

The structures of the adducts formed from organotin moieties and 1-[(4-methoxyphenylimino)methyl]-2-naphthol. Crystal structure of chlorotrimethyl[1-[(4-methoxyphenylimino)methyl]-2-naphthol]tin(IV): Me3SnCl.[HOC10H6CH:NC6H4OCH3]

J.Organomet.Chem., 454, 73-77 (1993)

S.G.Teoh, S.B.Teo, G.Y.Yeapand H.K.Fun

A novel formation of salicylaldehyde azine and related azines from methyl-hydrazones induced by tin(IV) chloride and crystal structure of 3-methoxy-salicylaldehyde azine

Main Group Metal Chem.,17(8), 595-601 (1994)

S.G.Teoh, G.Y.Yeap, S.B.Teo and H.K.Fun

Syntheses and spectroscopic studies of inorganic tin and organotin derivatives of 1-[(4-methylphenylimino)methyl]-2-naphthol. Crystal structure of chlorotrimethyl-{1-[(4-methylphenylimino)methyl]-2-naphthol}tin(IV)

Polyhedron, 14(8), 1051-1056 (1995)

S.G.Teoh, G.Y.Yeap, S.B.Teo and J.P.Declercq

Protonated ligand outer-sphere complexes formed from the reaction of SnCl4with benzalideneaniline and related imines: X-ray crystal structure of bis[N-benzalidene-anilinium] hexachlorostannate(IV)

J.Coord.Chem., 36, 215-223 (1995)

G.Y.Yeap, S.G.Teoh, C.Wei and J.P.Declercq 

Complex salts derived from the reactions of InBr3and InCl3with some aromatic Schiff bases: X-ray crystal structure of bis[N-(2-hydroxybenzalidene)-2-methoxyanilinium] tetrabromoindate(III)

Main Croup Metal Chem.,18(5), 245-250 (1995)

G.Y.Yeap, M.C.Feng, A.C.Ng and E.R.T.Tiekink

Crystal structure of 3-(2-hydroxyphenyl)-2-propene-1-one, C15H12O2, ,  

Zeits. Fur Kristallogr. NCS 211, 949-950 (1996)

G.Y.Yeap, S.G.Teoh, S.B.Teo, S.C.Loh and H.K.Fun

Inner sphere complexes derived from the coordinate interactions of thin(IV) isothiocyanate moieties with 1-[(4-methylphenylimino)methyl]-2-phenol. Crystal structure of diisothiocyanatodimethylbis{1-[(4-methylphenyl-imino)methyl]-2-phenol}tin(IV),

Me2Sn(NCS)2.[HOC6H4CH:NC6H4CH3]2

Polyhedron, 15(22), 3941-3946 (1996)

International Refereed Journals

S.G.Teoh, G.Y.Yeap, C.C.Loh, L.W.Foong, S.B.Teo and H.K.Fun

Inner coordination speher tin(IV) complexes with some O,N,N-terdentate{N-(2-hydroxybenzaldehyde)-1-amino-2-phenyleneimine and N-(2-hydroxy-1-naphthaldehyde)-1-amino-2-phenyleneimine} and O,N,N,O-quadri-dentate{N,N’-bis(2-hydroxybenzaldehyde)-1,2-phenylenediimine and N,N’-bis(2-hydroxy-1-naphthaldehyde)-1,2-phenylenediimine} Schiff bases

Polyhedron, 16(13), 2213-2221 (1997)

G.Y.Yeap, N.Ishizawa and Y.Nakamura 

Synthesis and characterization of a five-coordinate 1:1 adduct derived from diphenyltin(IV) dichloride and 6-methoxy-2-[(4-cyanophenylimino)methyl]-phenol

J. Coord. Chem.,44, 325-333 (1998)

G.Y.Yeapand N.Ishizawa

Dibutyldichlorobis{2-[(phenylethylimino)methyl]phenol-O}tin(IV)

Acta Cryst., C54, 720-722 (1998)

G.Y.Yeapand N.Ishizawa

New tin-Schiff’s base materials: Coordination chemistry and single crystal structure determination

Mol. Cryst. Liq. Cryst.,318, 253-266 (1998)

G.Y.Yeap, S.G.Teoh, S.B.Teo, G.Valle and S.Calogero

Crystal structure of 1-[(3-nitrophenylimino)methyl]-2-naphthol, C17H12N2O3

Zeits. Fur Kristallogr., NCS 213, 489-490 (1998)

G.Y.Yeap, A.C.Ng, S.G.Teoh, S.B.Teo and J.P.Declercq

Synthesis and characterization of outer coordination sphere complexes: [LH+]2[SnCl6]2-, [LH+]2[Me4Sn2Cl6]2-and [LH+][Ph2SnCl3]-(LH+= protonated 2-methoxy-1-[(4-chloro-phenylimino)methyl]naphthalene. Crystal structure of 2-methoxy-1-[(4-chlorophenyl-imino)methyl]naphthalenium trichlorodiphenyl-stannate(IV), [LH+][Ph2SnCl3]-, derived from diphenyltin dichloride and 2-methoxy-1-[(4-chlorophenylimino)methyl]naphthalene

J.Coord.Chem., 48, 63-72 (1999)

M.C.Feng, M.G.Tay, G.Y.Yeap, M.M.Norani, S.G.Teoh and E.R.T.Tiekink

Crystal structure of E-1-(2-hydroxyphenyl)-3-(3-hydroxyphenyl)-2-propen-1-one, C15O12O3

Zeits. Fur Kristallogr., NCS 214, 205-206 (1999)

S.G.Teoh, D.S.Tan, G.Y.Yeapand H.K.Fun

Crystal structure of tricyclohexylaqua[3-pyridylacrylato]tin(IV), C26H41NO3Sn

Zeits. Fur Kristallogr., NCS214, 161-162 (1999)

G.Y.Yeap, S.G.Teoh, S.B.Teo and C.Sandro

Crystal structure of 3-bromo-1-[(2-methylphenylimino)methyl]phenol

Zeits. Fur Kristallogr., NCS214, 163-164 (1999)

M.C.Feng, G.Y.Yeap, M.G.Tay, S.G.Teoh, R.A.Howie and H.Rufino

Crystal structure of 3-(2-hydroxyphenyl)-1-(2’-hydroxyphenyl)-2-propen-1-one, C15H12O3

Zeits. Fur Kristallogr., NCS214, 329-330 (1999)

S.G.Teoh, D.S.Tan, G.Y.Yeapand H.K.Fun

Tricyclohexyltin(IV) complexes with picolinic, nicotinic and 5-bromonicotic acids

 J.Coord.Chem., 48, 53-61 (1999)                                                                                         

G.Y.Yeap, Y.Takanishi and H.Takezoe

FTIR and 1H-NMR studies of chiral (S)-(-)-2-methylbutyl 4’-(4”-hexyloxy-, (S)-(-)-2-methylbutyl 4’-(4”-(d13)-hexyloxy-, (S)-(-)-2-methylbutyl 4’-(4”-octyloxy- and (S)-(-)-2-methylbutyl 4’-(4”-(d17)-octyloxyphenyl)benzoates

Spectroscopy, 14,93-98 (2000)

International Refereed Journals

G.Y.Yeap, M.Nakata, Y.Takanishi, K.Ishikawa and H.Takezoe

Smectic A and smectic C materials: partially deuterated chiral liquid crystals (S)-(-)-2-methylbutyl 4-(4-(d13)-hexyloxyphenyl)benzoate and (S)-(-)-2-methylbutyl 4-(4-(d17)-octyloxyphenyl)benzoate

Liquid Crystals,27, 1437-1443 (2000)

G.Y.Yeap, W.S.Ooi, Y.Nakamura and Z.Cheng

Synthesis and mesomorphic properties of Schiff base esters  p-n-octadecanoyl-oxybenzylidene-p-cyano-,p-hydroxy-, p-nitro and p-carboxyanilines

Mol.Cryst.Liq.Cryst., 381, 169-178 (2002) 

S.Gupta, S.Henk, G.Kees, G.Y.Yeap, I.Susanti, W.A.K.Wan Mahmood and S.P.Sen Gupta

Crystal structure of E-1-(phynyl)-3-(4-hydroxyphenyl)-2-propene-1-one

Zeits. Fur Kristallogr., NCS217, 503-504 (2002)

G.Y.Yeap, S.T.Ha, N.Ishizawa, K.Suda, P.L.Boey and W.A.K.Mahmood

Synthesis, crystal structure and spectroscopic study of para substituted 2-hydroxy-3-methoxybenzalideneanilines
J.Mol.Struct., 658, 87-99 (2003)

S.B.Teo, L.M.Yeow, G.Y.Yeap,  N.Ishizawa, B.Etschmann and B.Skelton

Complex salts derived from the reactions of organotin(IV) with 6-methylpyridine-2-carboxaldehyde phenylhydrazone: X-ray crystal structure of bis[6-methyl-pyridine-2-carboxaldehydehydrazodium] Tetrachlorodimethylstannate(IV)

J.Coord.Chem., 56, 215-221 (2003)

G.Y.Yeap, S.T.Ha, M.M.Ito, P.L.Boey and W.A.K.Mahmood

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 (2004)

G.Y.Yeap, S.T.Ha, Y.Nakamura, P.L.Boey, W.A.K.Mahmood, M.M.Ito, H.Nakai and M.Yamaki

Fourier transform infrared and conformational analysis of cholesteryl 4-n-alkoxy-benzoates in solution

Spect.Lett., 37, 319-336 (2004)

G.Y.Yeap, S.T.Ha, P.L.Lim, P.L.Boey, W.A.K.Mahmood,  M.M.Ito and S.Sanehisa

Synthesis and mesomorphic properties of Schiff base esters ortho-hydroxy-para-alkyloxybenzylidene-para-substituted-anilines

Mol.Cryst.Liq.Cryst., 423, 73-84 (2004)

G.Y.Yeap, I.Susanti, W.A.K.Mahmood, B.S.Teoh and W.T.A.Harrison

Synthesis and phase transition in new chalcone derivatives. Crystal structure of 1-phenyl-3-(4’-undecylcarbonyloxyphenyl)-2-propen-1-on

Mol.Cryst.Liq.Cryst., 442, 133-146(2005)

G.Y.Yeap, S.T.Ha, P.L.Boey, W.A.K.Mahmood, M.M.Ito and Y.Youhei

Synthesis and characterization of some new mesogenic Schiff base esters N-[4-(4-n-hexadecanoyoxybenzoyloxy)benzylidene]-4-substituted anilines

Mol.Cryst.Liq.Cryst.,452,73-90 (2006)

G.Y.Yeap, T.C.Hng, W.A.K.Mahmood, R.Adnan, M.M.Ito and Y.Youhei 

Synthesis and mesomorphic properties of symmetrical dimers N,N-bis(3-methoxy-4-alkoxybenzylidene)-1,4-phenylenediamine

Mol.Cryst.Liq.Cryst.,452, 49-61 (2006)

G.Y.Yeap, S.T.Ha, P.L.Lim, P.L.Boey, M.M.Ito, S.Sanehisa and V.Vill

Nematic and smectic A phases in ortho-hydroxy-para-hexadecanoyloxy-benzylidene-para-substituted anilines

Mol.Cryst.Liq.Cryst.,452, 63-72 (2006)

International Refereed Journals

G.Y.Yeap, S.T.Ha, P.L.Lim, P.L.Boey, M.M.Ito, S.Sanehisa and Y.Youhei

Synthesis, physical and mesomorphic properties of Schiff base esters containing ortho-, meta-, and para-substituents in benzylidene-4’-alkanoyloxyanilines

Liquid Crystals, 33, 205-211 (2006)

G.Y.Yeap, T.C.Hng, W.A.K.Mahmood, M.M.Ito, Y.Youhei, Y.Takanishi and   H.Takezoe

Smectogenic properties of N,N’-bis[(2-hydroxy-4-alkoxyphenyl)methylene]-benzene-1,4-diamine liquid crystals with double lateral H-bonds

Liquid Crystals, 33, 979-986 (2006)

G.Y.Yeap, M.M.Chong, A.Ono, M.M.Ito, H.Nakai, S.Sanehisa and Y.Nakamura

Synthesis and liquid crystalline properties of bis[((p-substituted phenylilmino)methyl)-phenyl]decyl and dodecyl ethers

Journal of Science and Technology in the Tropics,2, 51-57 (2006)

G.Y.Yeap, W.S.Yam, M.M.Ito, Y.Takahashi, Y.Nakamura, W.A.K.Mahmood,  

P.L.Boey;  S.A. Hamid and E.Gorecka

Synthesis and mesomorphic properties of 7-acyloxy-3-(4-acyloxyphenyl)-4H-1-benzopyran-4-one

Liquid Crystals,34(5), 649-654 (2007)

G.Y.Yeap, C.H.Ong, D.Takeuchi, M.Kakeyab, K.Osakada, W.A.K.Mahmood, O.Atsuko and V.Vill

Synthesis and molecular structure of asymmetric 2,2’-(4-(alkyloxy)-1,3-phenylene)bis(1-(4-substitutedphenyl)diazene). Crystal structure of 2,2’-(4-(octyloxy)-1,3-phenylene)-bis(1-(4-chlorophenyl)diazene)

J.Mol.Struct., 882, 1-8(2008)

G.Y.Yeap, T.C.Hng, W.A.K.Mahmood, E.Gorecka, D.Takeuchi, and K.Osakada 

Novel nonsymmetric trimeric liquid crystals exhibiting glassy nematic state at low temperatures 

Mol.Cryst.Liq.Cryst.,487, 135-152 (2008)

G.Y.Yeap, W.S.Yam, M.M.Ito, Y.Takahashi, D.Takeuchi, M.Kakeya, K.Osakada, Y.Nakamura, W.A.K.Mahmood, P.L.Boey, S.A.Hamid and E.Gorecka

Synthesis and phase behaviour of some new isoflavone derivatives

Ferroelectrics, 365, 65-77 (2008)

G.Y.Yeap, W.S.Yam, D.Takeuchi, K.Osakada, E.Gorecka, W.A.K.Mahmood, P.L.Boey and S.A.Hamid

Synthesis, thermal stabilities, and anisotropic properties of some new isoflavone-based esters 7-decanoyloxy-3-(49-substitutedphenyl)-4H-1-benzopyran-4-ones

Liquid Crystals,35, 315-323 (2008)

G.Y.Yeap, W.S.Yam, D.Takeuchi, M.Kakeya and K.Osakada

Synthesis and phase behavior of new isoflavone derivatives: Crystal structure of 7-hexyloxy-3-[4-(3-methylbutyloxy)phenyl]-4H-1-benzopyran-4-one                                                                                                                  

Mol.Cryst.Liq Cryst., 482, 87–102 (2008)

S.T.Ha, L.K.Ong, Y.F.Win, T.M.Koh and G.Y.Yeap

Synthesis of new Schiff base: 4-[(pyridin-3-ylmethylene)amino]-phenyldodecanoate

Molbank, M582, 1-3 (2008)

S.T.Ha, L.K.Ong, S.T.Ong, G.Y.Yeap, J.P.W.Wong, T.M.Koh and H.C.Lin

Synthesis and mesomorphic properties of new Schiff base esters with different alkyl chains

Chin.Chem.Lett.,20, 767-770(2009)

International Refereed Journals

S.T.Ha, L.K.Ong, Y.F.Win, T.M.Koh and G.Y.Yeap

4-[(Pyridin-3-ylmethylene)amino]phenylhexadecanoate

Molbank,M584, 1-3 (2009)

S.T.Ha, L.K.Ong, Y.F.Win, T.M.Koh and G.Y.Yeap

 4-[(Pyridin-3-ylmethylene)amino]phenyltetradecanoate

Molbank,M585, 1-3 (2009)

G.Y.Yeap, T.C.Hng, D.Takeuchi, K.Osakada, W.A.K.Mahmood and M.M.Ito

Non-symmetric liquid crystal dimers: High thermal stability in nematic phases enhanced by thiophene-2-carboxylate moieties

Mol.Cryst.Liq.Cryst.,506, 134-149 (2009)

S.T.Ha, T.M.Koh, G.Y.Yeap, H.C.Lin, P.L.Boey, Y.F.Win, S.T.Ong and L.K.Ong 

Synthesis and mesomorphic properties of 2-(4-alkyloxyphenyl)benzothiazoles

Mol.Cryst.Liq.Cryst.,506, 56-70(2009)

G.Y.Yeap, T.C.Hng, W.A.K.Mahmood, D.Takeuchi and K.Osakada

Laterally brominated liquid crystal trimers with (s)-(-)-2-methylbutyl-4’(4”-phyenyl)-benzoate exhibiting N* and blue phases

Mol. Cryst. Liq. Cryst.,515, 215-229 (2009)

S.T.Ha, L.K.Ong, J.P.W.Wong, G.Y.Yeap, H.C.Lin, S.T.Ong and T.M.Koh 

Mesogenic Schiff’s base ether with dimethylamino end group

Phase Trans.,82, 387-397 (2009)

S.T.Ha, L.K.Ong, Y.F.Win, T.M.Koh and G.Y.Yeap

4-[(Pyridin-3-ylmethylene)amino]phenyloctadecanoate

Molbank, M591, 1-3 (2009)

G.Y.Yeap, T.C.Hng, W.A.K.Mahmood, E.Gorecka, D.Takeuchi and K.Osakada

Chirality-induced liquid crystalline properties of seven-ring trimeric mesogens incorporating dual chiral centers 

Mol.Cryst.Liq.Cryst.,506, 109-133 (2009)

G.Y.Yeap, W.S.Yam, L.Dobrzyscky, E.Gorecka, D.Takeuchiand M.M.Ito

Synthesis, mesomorphic properties and X-ray diffraction studies on 7-alkyloxy-3-(4-alkyloxyphenyl-4H-1-benzopyran-4-one: Crystal structure of 7-hexyloxy-3-(4-hexyloxyphenyl)-4H-1-benzopyran-4-one 

J.Mol.Struct., 937, 16-24 (2009)

S.T.Ha, T.M.Koh, G.Y.Yeap, H.C.Lin, J.K.Beh, Y.F.Win and P.L.Boey

New mesogenic Schiff base esters comprising benzothiazole moiety: Synthesis and mesomorphic properties

Chin.Chem.Lett.,20, 1081-1084 (2009)

S.T.Ha, T.M.Koh, H.C.Lin, G.Y.Yeap, Y.F.Win, S.T.Ong, Y.Sivasothy and L.K.Ong

Heterocyclic benzothiazole-based liquid crystals: synthesis and mesomorphic properties  

Liquid Crystals,36, 917-925 (2009)

G.Y.Yeap, T.C.Hng, S.Y.Yeap, E.Gorecka, M.M.Ito, K.Ueno, M.Okamoto, W.A.K.Mahmood and C.T.Imrie

Why do non-symmetric dimers intercalate?  The synthesis and characterisation of the α-(4-benzylidene-substituted-aniline-4’-oxy)-ω-(2-methylbutyl-4’-(4”-phenyl)-benzoateoxy)-alkanes

Liquid Crystals, 36, 1431-1441 (2009)

S.T.Ha, S.T.Ong, Y.T.Chong and G.Y.Yeap

4-{[(3-Cyanophenyl)imino]methyl}-3-hydroxyphenyl tetradecanoate

Molbank,M630, 1-3 (2009)

S.T.Ha, S.T.Ong, Y.T.Chong and G.Y.Yeap

3-Hydroxy-4-{[(3-nitrophenyl)imino]methyl}phenyl tetradecanoate

Molbank,M631, 1-3 (2009)

S.T.Ha, S.T.Ong, Y.T.Chong and G.Y.Yeap

3-Hydroxy-4-{[(3-nitrophenyl)imino]methyl}phenyl myristate

Molbank,M632, 1-3 (2009)

International Refereed Journals

S.T.Ha, G.Y.Yeapand P.L.Boey                                                                                              

Synthesis and liquid crystalline properties of new Schiff bases N-[(4-n-alkanolyoxy-benzoyloxy)benzylidene]-4-cyano-, 4-hydroxy-, 4-thio- and 4-nitoranilines     

Aust.J.Basic and Appl.Sci., 3, 3417-3422(2009)

S.T.Ha, S.T.Ong, Y.T.Chong and G.Y.Yeap

4-{[(3-Chlorophenyl)imino]methyl}-3-hydroxyphenyl myristate

Molbank,M629, 1-3 (2009)

S.T.Ha, T.M.Koh, S.L.Lee, G.Y.Yeap, H.C.Lin and S.T.Ong

Synthesis of new Schiff base ester liquid crystals with a benzothiazole core

Liquid Crystals, 37, 547-554(2010)

G.Y.Yeap, W.S.Yam, P.Dominiak and M.M.Ito

Synthesis and structural study on heterocyclic compounds 7-decanoyloxy-3-(4’-substitutedphenyl)-4H-1-benzopyran-4-ones: Crystal structure of 7-decanoyloxy-3-(4’-methylphenyl)-4H-1benzopyran-4-one

J.Mol.Struct., 967, 25-33(2010)

S.T.Ha, T.M.Koh, G.Y.Yeap, H.C.Lin, S.L.Lee, Y.F.Win and S.T.Ong

Mesogenic Schiff base esters with benzothiazole core: Synthesis and phase transition studies

Phase Transitions, 83, 195-204(2010)

G.Y.Yeap, M.A.Karim and H.Osman

Synthesis, spectroscopic and mesomorphic studies on heterocyclic liquid crystals with 1,3-oxazepine-4,7-dione, 1,3-oxazepane-4,7-dione and 1,3-oxazepine-1,5-dione cores

J.Mol.Struct.,982, 33-44(2010)

S.T.Ha, L.K.Ong, Y.F.Win, Y.Sivasothy, G.Y.Yeapand P.L.Boey  

The synthesis and characterization of new Schiff bases: 4-[(pyridine-4-yl-methylene)-amino]phenylalkanoates

Aust.J.Basic and Appl.Sci., 4, 1146-1151 (2010)

S.T.Ha, L.K.Ong, Y.Sivasothy, G.Y.Yeap, H.C.Lin, S.L.Lee, P.L.Boey and N.L.Bonde

Mesogenic Schiff base esters with terminal chloro group: Synthesis, thermotropic properties and x-ray diffraction studies

Int J.Phy.Sci., 5, 564-575 (2010)

S.T.Ha, L.K.Ong, Y.F.Win, G.Y.Yeap, N.L.Bonde and P.L.Boey

New Schiff bases with pyridine core: Spectral, thermal and optical characterizations

Am.J.Appl.Sci., 7, 656-660 (2010)

S.T.Ha, G.Y.Yeapand P.L.Boey

 Synthesis and smectrogenic A and C* properties of (S)-(-)-2-methylbutyl 4'-(4''-n-alkanyloxybenzoyloxy)biph enyl-4-carboxylates

Int.J.Phy.Sci,, 5, 182-191 (2010)

S.T.Ha, L.J.Ong, Y.Sivasothy, G.Y.Yeap, P.L.Boey and H.C.Lin

New mesogenic Schiff base esters with polar chloro substituent: Synthesis, thermotropic properties and x-ray diffraction studies

Am.J.Appl.Sci., 7, 214-229 (2010)

S.T.Ha, T.M.Koh, G.Y.Yeap, H.C.Lin, S.L.Lee, Y.F.Win and S.T.Ong

Synthesis and mesomorphic properties of 6-methoxy- and 6-ethoxy-2-(2-hydroxy-4-alkanoyloxybenzylidenamino)benzothiazoles

Mol.Cryst.Liq.Cryst.,528, 10-22 (2010)

S.T.Ha, L.K.Ong, G.Y.Yeap, M.M.Ito, A.Saito, M.Watanabe and S.L.Lee

Effect of terminal branching on mesomorphism of a homologous series of Schiff base ethers

Sci. Res. Ess., 5, 3018-3026 (2010)

S.T.Ha, G.Y.Yeapand P.L.Boey

Mesomorphic properties of biphenyl derivatives with cholesteryl moiety, Int.J.Phy.Sci, 5, 2185-2192 (2010)

G.Y.Yeap, W.S.Yam, W.S.Chang, E.Gorecka, D.Takeuchi and K.Osakada

Synthesis, anisotropic behaviour and structural changes in somepara-substituted isoflavones: 4’-substituted-7-(4’’-decyloxybenzoyloxy)-4H-1-benzopyran-4-ones, Phase Transitions, 84, 256-268 (2011)

International Refereed Journals

W.S.Yam and G.Y.Yeap

Nematogenic and smectogenic liquid crystals from new heterocyclic isoflavone derivatives: Synthesis, characterization and X-ray diffraction studies, Chin.Chem.Lett., 22, 229-232 (2011)

T.M.Koh, S.T.Ha, T.L.Lee, S.L.Lee, G.Y.Yeap, H.C.Lin and R.T.Subramanian

Synthesis and mesomorphic evaluation of new calamitic liquid crystals containing benzothiazole core, Chin.Chem.Lett.,22, 619-622 (2011)

A.T.Mohammad, H.Osman and G.Y.Yeap

1,3-Oxazepane-4,7-diones compounds: 1H and 13C NMR high resolution spectroscopy (1D and 2D), Int. J. Spect., 2011, 1-7 (2011)

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S.T.Ha, T.L.Lee, G.Y.Yeap, M.M.Ito, A.Saito and M.Watanabe

Mesomorphic behavior of new azomethine liquid crystals having terminal iodo group, Chin.Chem.Lett.,22, 260-263 (2011)

A.T.Mohammad, H.Osman and G.Y.Yeap

Mesomorphic properties of heterocyclic 1,3-oxazepane-4,7-diones compounds, Aust.J.Basic and Appl.Sci., 5, 551-554 (2011)

A.T.Mohammad, H.Osman and G.Y.Yeap

Structural Investigation of novel heterocyclic 1,3-oxazepine by 2D NMR, Aust.J.Basic and Appl.Sci., 5,192-198 (2011)

G.Y.Yeap, H.C.Lee, W.A.K.Mahmood, C.T.Imrie, D.Takeuchi and K.Osakada

Synthesis, thermal and optical behaviour of non-symmetric liquid crystal dimers α-(4-benzylidene-substituted-aniline-4’-oxy)-ω-[pentyl-4-(4’-phenyl)benzoateoxy]-hexane, Phase Transitions, 84, 29-37(2011)

G.Y.Yeap, B.T.Heng, M.Kakeya, D.Takeuchi, E.Gorecka and M.M.Ito

Synthesis, 2D NMR and X-ray diffraction studies on Cu(II) and Ni(II) complexes with ligands derived from azobenzene-cored Schiff base: Mesomorphic behaviors of Cu(II)-phenolates and crystal structure of bis[4-(4-alkoxy-2-hydroxybenzylidene-amino)azobenzene]copper(II), J.Mol.Struct., 999, 68-82 (2011)

H.Osman, A.T.Mohammad, G.Y.Yeapand A.Farook

Synthesis and characterization of new 3-(3-hydroxyphenyl)-4-alkyl-3,4-dihydro-benzo[e][1.3]oxazepine-1,5-dione compounds, Chin.J.Chem.,29,1518-1522 (2011)

S.T.Ha, T.L.Lee, Y.F.Win and G.Y.Yeap

4-{[(4-iodophenyl)imino]methyl}phenyl octadecanoate, Molbank,M732 (2011)

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S.T.Ha, T.L. Lee, G.Y.Yeap, H.C.Lin, M.M.Ito and R.T.Subramaniam

Synthesis and mesomorphic properties of 4-(methylthio)benzylidene-4’-n-alkanyoloxyanilines, Asian J.Chem., 23, 4609-4612 (2011)

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S.T.Ha, G.Y.Yeapand P.L.BoeySynthesis and mesomorphic properties of new Schiff base liquid crystals, N-[4-(4-n-alkanyloxybenzoyloxy)-2-hydroxybenxylidene]4-substituted-anilines, Res.J.Chem.Environ.,15, 677-682 (2011)

S.T.Ha, Y.F.Win, S.L.Lee, M.M.Ito, K.Abe, H.Oonishi and G.Y.Yeap

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, 2507-2517 (2011)

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S.T.Ha, G.Y.Yeapand P.L.Boey

4-{[(4-fluorophenyl)imino]methyl}-3-hydroxyphenyl 4-(hexadecanoyloxy)benzoate, Molbank,M723(2011)

G.Y.Yeap, T.N.Chan, W.S.Yam, D.Takeuchi and M.M.Ito

Influence of bromoalkyloxy side chain on mesomorphic behavior in heterocyclic 7-(4-bromoalkyloxy)-3-(4′-decyloxyphenyl)-4H-1-benzopyran-4-ones, Chin.Chem.Lett.,22, 947-950 (2011)

S.T.Ha, T.L.Lee, Y.F.Win and G.Y.Yeap

4-({[4-(Methylthio)phenyl]methylene}amino)phenyl dodeanoate, MolBank,M735 (2011)

S.T.Ha, G.Y.Yeapand P.L.Boey

4-{[4-Methylphenyl]imino}methyl}-3-hydroxyphenyl 4-(hexadecanoyloxy)benzoate, Molbank, M738(2011)