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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.

Show MeSH
(A) Marble texture for Nematic phase in heating at 150 °C for SR1; (B) Schlieren texture for Nematic phase in cooling at 234 °C for SR1.
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f3-ijms-12-03182: (A) Marble texture for Nematic phase in heating at 150 °C for SR1; (B) Schlieren texture for Nematic phase in cooling at 234 °C for SR1.

Mentions: The Nematic phase reflects the marbled texture on heating and the schlieren texture on cooling (Figure 3).


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

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

(A) Marble texture for Nematic phase in heating at 150 °C for SR1; (B) Schlieren texture for Nematic phase in cooling at 234 °C for SR1.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f3-ijms-12-03182: (A) Marble texture for Nematic phase in heating at 150 °C for SR1; (B) Schlieren texture for Nematic phase in cooling at 234 °C for SR1.
Mentions: The Nematic phase reflects the marbled texture on heating and the schlieren texture on cooling (Figure 3).

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