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Mesomorphic properties of an homologous series of thioalkyl-terminated azomesogens.

Al-Hamdani UJ - Int J Mol Sci (2011)

Bottom Line: A new homologous series (ten compounds) of 2-hydroxy azo compounds SR(n) (where n:1-10) were synthesized.Their structures were elucidated using spectroscopic techniques such as IR (Infrared), (1)H-NMR as well as elemental analysis.It has been found that all compounds in the series are pure nematogens.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, College of Education, Basrah University, P.O. Box 716, Basrah, Iraq; E-Mail: Uhood1959@yahoo.com ; Tel.: +009647712616545;

ABSTRACT
A new homologous series (ten compounds) of 2-hydroxy azo compounds SR(n) (where n:1-10) were synthesized. Their structures were elucidated using spectroscopic techniques such as IR (Infrared), (1)H-NMR as well as elemental analysis. Mesomorphic properties and phase transitions were studied using polarized hot stage optical microscopy and differential scanning calorimetry (DSC), and are discussed as a function of the number of carbon atoms in the thioalkyl chain. It has been found that all compounds in the series are pure nematogens.

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1H-NMR for E-SR3 with expansion for aliphatic protons.
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f5-ijms-12-03182: 1H-NMR for E-SR3 with expansion for aliphatic protons.

Mentions: 3-hydroxy-4-((p-tolyldizenyl)methyl)phenyl-4-propylthio)benzoate (E-SR3): Orange solid; yield% 43; 1H-NMR (CDCl3): 1.07 (t, 3H, CH3), 1.75 (Hextet, 2H, CH2), 2.42 (S, 3H, CH3), 2.98 (t, 2H, SCH2), 6.90–8.10 (m, 11H, Ar-H), 13.3 (S, 1H, OH) (Figure 5); IR cm−1: 1732 (C=O), 1450–1600 C=C); Elemental analysis calculated for C23H22O3N2S: %C 67.98, %H 5.41, %N 6.89, %S 7.88. found: %C 68.29, %H 5.51, %N 6.94, %S 7.93.


Mesomorphic properties of an homologous series of thioalkyl-terminated azomesogens.

Al-Hamdani UJ - Int J Mol Sci (2011)

1H-NMR for E-SR3 with expansion for aliphatic protons.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC3116184&req=5

f5-ijms-12-03182: 1H-NMR for E-SR3 with expansion for aliphatic protons.
Mentions: 3-hydroxy-4-((p-tolyldizenyl)methyl)phenyl-4-propylthio)benzoate (E-SR3): Orange solid; yield% 43; 1H-NMR (CDCl3): 1.07 (t, 3H, CH3), 1.75 (Hextet, 2H, CH2), 2.42 (S, 3H, CH3), 2.98 (t, 2H, SCH2), 6.90–8.10 (m, 11H, Ar-H), 13.3 (S, 1H, OH) (Figure 5); IR cm−1: 1732 (C=O), 1450–1600 C=C); Elemental analysis calculated for C23H22O3N2S: %C 67.98, %H 5.41, %N 6.89, %S 7.88. found: %C 68.29, %H 5.51, %N 6.94, %S 7.93.

Bottom Line: A new homologous series (ten compounds) of 2-hydroxy azo compounds SR(n) (where n:1-10) were synthesized.Their structures were elucidated using spectroscopic techniques such as IR (Infrared), (1)H-NMR as well as elemental analysis.It has been found that all compounds in the series are pure nematogens.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, College of Education, Basrah University, P.O. Box 716, Basrah, Iraq; E-Mail: Uhood1959@yahoo.com ; Tel.: +009647712616545;

ABSTRACT
A new homologous series (ten compounds) of 2-hydroxy azo compounds SR(n) (where n:1-10) were synthesized. Their structures were elucidated using spectroscopic techniques such as IR (Infrared), (1)H-NMR as well as elemental analysis. Mesomorphic properties and phase transitions were studied using polarized hot stage optical microscopy and differential scanning calorimetry (DSC), and are discussed as a function of the number of carbon atoms in the thioalkyl chain. It has been found that all compounds in the series are pure nematogens.

Show MeSH