Synthesis, characterization, and photoresponsive studies on lignin functionalized with (E)-2-(4-(naphthalen-1-yldiazenyl)phenyl)acetic acid
Article first published online: 21 DEC 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Polymers for Advanced Technologies
Volume 24, Issue 4, pages 437–440, April 2013
How to Cite
Chandran, A., Kuriakose, S. and Mathew, T. (2013), Synthesis, characterization, and photoresponsive studies on lignin functionalized with (E)-2-(4-(naphthalen-1-yldiazenyl)phenyl)acetic acid. Polym. Adv. Technol., 24: 437–440. doi: 10.1002/pat.3094
- Issue published online: 13 MAR 2013
- Article first published online: 21 DEC 2012
- Manuscript Accepted: 1 NOV 2012
- Manuscript Revised: 30 SEP 2012
- Manuscript Received: 22 SEP 2012
- environment friendly;
- light fastening;
- coating material
A chromophoric system (E)-2-(4-(naphthalen-1-yldiazenyl)phenyl)acetic acid incorporated onto a nature friendly biopolymeric core material, lignin (technical lignin, lignin sulphonic acid M.W. 52,400), and the photo responsive behavior of the product was investigated. The product was characterized by UV–visible, fluorescence, Fourier transform infrared, and nuclear magnetic resonance spectroscopic methods. The results of the studies show that the incorporation of the chromophoric system on to the lignin core enhanced the light absorption and light stabilization properties of the chromophoric system. The trans-cis photoisomerization and the reverse cis-trans thermal conversions were also assisted by the lignin core. The remarkable stability on irradiation shows that this is a novel photoresponsive system with excellent light fastening properties which would find application in coating materials, dyes, paints, inks, and many more. Copyright © 2012 John Wiley & Sons, Ltd.