A research team from the Chemistry Department consisted of:
Prof. Dr. Ohoud Jabbar Al-Hamdani
Assistant Professor Dr. Ahmed Majid Jassem
Prof. Dr. Adel Mualla Damad
Mrs. Saja Al-Shalshat
Who published a research titled
Synthesis, mesomorphic properties, and theoretical study of benzothiazole-aromatic molecules with ester- and azomethine-linking groups
In a magazine: Liquid Crystals
It is a solid magazine among the Scopes and Clarvet containers
Among the British publishing house Taylor & Francis:
In this paper two new groups of rod-like molecules with aromatic systems of benzothiazoles were prepared: Group I (Group A) contains ester bonds with different thioalkyl chain and Group II (Group B) contains ester and azomethine bonds with substituted methoxy group at different sites. At the edge of the part of the tumor. The structures of the prepared particles were confirmed using physical techniques FT-IR, melting points were used, analyzers were used to study liquid crystal systems, where differential scanning calorimeter and polarization optical microscopy were used to verify their liquid crystal behaviors and transition temperatures. All the prepared molecules (groups A and B) showed an anti-stress nematic phase except for a compound within the group which showed a nematic phase only on cooling. The shape-related properties of the prepared molecules were compared with some other structurally related compounds to understand the relationship of the chemical composition to the properties of the formed liquid crystal phase. It was found that the thermal range of the nematic phase of the molecules (group A) decreases with the increase in the length of the thio-alkyl chain. The study also demonstrated that the liquid crystalline properties of the compounds (Group B) were significantly affected by the different location of the terminal methoxy group compensation of the aromatic system. Theoretical calculations were used to study the effect of the compensation site of the terminal methoxy group of the aromatic system on the liquid crystal behavior of the molecules (group B) as well as to verify whether the theoretical calculations have agreement with the experimental results.
