Synthesis and liquid crystalline properties of new diols containing azomethine groups

Molecules

Volumn 15, Issue 5, 2010, Pages 3260-3269

  Mohammed, Issam Ahmed ^a   Sankar, Govindarajan ^a   Khairuddean, Melati ^b   Mohamad, Abu Bakar ^b  

^a Universiti Sains Malaysia   (Malaysia)

^b SCHOOL OF PHYSICS   (Malaysia)

Author keywords

Azomethine; Diols; Nematic phase; Thermotropic liquid crystal

Indexed keywords

ALCOHOL DERIVATIVE; AZO COMPOUND; AZOMETHINE; THIOSEMICARBAZONE DERIVATIVE;

ARTICLE; CHEMICAL STRUCTURE; CHEMISTRY; DIFFERENTIAL SCANNING CALORIMETRY; LIQUID CRYSTAL; PHASE TRANSITION; SYNTHESIS; TRANSITION TEMPERATURE;

ALCOHOLS; AZO COMPOUNDS; CALORIMETRY, DIFFERENTIAL SCANNING; LIQUID CRYSTALS; MOLECULAR STRUCTURE; PHASE TRANSITION; THIOSEMICARBAZONES; TRANSITION TEMPERATURE;

EID: 77952807444     PISSN: None     EISSN: 14203049     Source Type: Journal    
DOI: 10.3390/molecules15053260     Document Type: Article

References (18)

1. Issam, A.M.; Ismail, J. New aromatic poly(azomethine urethane)s containing o-tolidine moiety in the polymer backbone. Des. Monomers Polym. 2006, 9, 237-246.
2. Sudhakar, S.; Narasimhaswamy, T.; Srinivasan, K.S.V. Towards the molecular-statistical modelling of the optically isotropic mesophase in neat systems: from the thermodynamic point of view. Liq. Cryst. 2000, 27, 1525-1559.
3. Samaresh, G.; Banthia A.K.; Zhu, C. Synthesis and photoresponsive study of azobenzene centered polyamidoamine dendrimers. Tetrahedron 2005, 61, 2889-2896.
4. Issam, A.M. Synthesis of novel Y-type polyurethane containing azomethiine moiety, as non-linear optical chromophore and their properties. Eur. Polym. J. 2007, 43, 214-219.
5. So, B.K.; Kim, W.J.; Lee, S.M.; Jang, M.C.; Song, H.H.; Park. J. H. Novel bent-shaped liquid crystalline compounds: III. Synthesis of Schiff base liquid crystal dimer. Dyes Pigm. 2007, 75, 619-623.
6. Bruice, P.Y. Infrared Spectroscopy, and NMR Spectroscopy. In Organic Chemistry; Pearson Education International: New Jersey, USA, 2004; pp. 482-592.
7. Unaleroglu, C.; Hokelek, T. The Crystal Structure and Conformational Analysis of N,N?-Bis(5-Bromo-2-Hydroxy-Benzylidene)Ethylenediamine. Spectrosc. Lett. 2002, 35, 317-326.
8. Stamatoiu, O.; Bubnov, A.; rcomnicu, I.; Iovu, M. Synthesis and spectral characterisation of new amido-ether Schiff bases, J. Mol. Struct. 2008, 886, 187-196.
9. Issam A.M.; Ismail, J. Improvement of thermal stability of new heteroaromatic poly(azomethine urethane)s. J. Appl. Polym. Sci. 2006, 100, 1198-1204.
10. Liu, Y.L.; Zhang, L.; Shi, J.; Cao S.K. Synthesis and characterization of liquid crystalline copolyesters containing horizontal and lateral rods in main chain. React. Funct. Polym. 2005, 64, 35-46.
11. Prescher, D; Thiele, T.; Ralf Ruhmann,; Schulz, G. Synthesis of liquid-crystalline poly(methacrylate)s with 4-trifluoromethoxy-azobenzene mesogenic side-groups, J. Fluorine Chem. 1995, 74, 185-189
12. McArdle, C.B. Side Chain Liquid Crystal Polymers. Blackie: Glasgow, UK, 1987; pp.74-75.
13. Perez, F.; Judeinstein, P.; Bayle, J.P. The effect of a lateral aromatic branch on the orientational ordering of laterally alkoxy substituted nematics. Liq. Cryst. 1997, 22, 711-719.
14. Hu, J.S.; Zhang, B.Y.; Zhou, A.J.; Yang, L.Q.; Wang. B. Side-chain cholesteric liquid crystalline elastomers derived from a mesogenic crosslinking agent: I. Synthesis and mesomorphic properties, Eur. Polym. J. 2006, 42, 2849-2858.
15. Chan, L.K.M.; Gray, G.W.; Lacey, D. Synthesis and Evaluation of Some 4, 4″-Disubstituted Lateral Fluoro-1, 1′:4′,1″-terphenyls. Mol. Cryst. Liq. Cryst. 1985, 123, 185-204.
16. Hoshino, H.; Hasegawa, H.; Matsunaga,Y. Mesomorphic properties of orthopalladated complexes of laterally substituted azobenzene derivatives, 2-alkoxycarbonyl-4-(4-ethoxyphenylazo)phenyl 4-methoxybenzoates. Liq.Cryst. 1991, 9, 267-276.
17. Berdague, P.; Bayle, J.P.; Ho, M.S.; Fung, B.M. New laterally aromatic branched liquid crystal materials with large nematic ranges. Liq. Cryst. 1993, 14, 667-674.
18. Dave, J.S.; Vora, R.A. Mesomorphic behavior of substituted phenylbenzoates- I: p(p'-n-alkoxybenzoyloxy) toluenes. Pramana 1975, Supplement 1, 447.