Thermal Performance, Photostability and UV-Visible Spectroscopic Studies of Some Synthesized azo- Schiff and Bis-azo-Schiff bases | |
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( Volume 3 Issue 7,July 2017 ) OPEN ACCESS | |
Author(s): | |
Nashwan O. Tapabashi, Khalid. M. Al-Janaby, Samira. A. Mohammed | |
Abstract: | |
A series of azo-Schiff bases and bis azo-Schiff bases were prepared by condensation reaction of azo-salicylaldehyde with different aromatic amines and azo-amines with various aromatic aldehydes in absolute ethanol. Thermal performances as well as photostabilities of the prepared compounds were tested by subjecting them as solutions in dimethyl sulfoxide to direct sunlight using a special exposure tool manufactured for this purpose. The results of exposure showed an improvement in the thermal performances of the prepared azo-Schiff bases comparing with the blank, the starting azo-amines and azo-aldehyde ranged between 3-7 degrees. The photostability studies against the sunlight proved stability of the prepared azo-Schiff bases compared to Congo red dye, one of the most famous azo dyes that have been selected as a reference for comparison, as well as to the azo-amines derived from. However azo-salicylicaldehyde was more photostable than its some azo-Schiff bases derivatives. |
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