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Synthesis, characterization, and photoresponsive studies on lignin functionalized with (E)‐2‐(4‐(naphthalen‐1‐yldiazenyl)phenyl)acetic acid
Author(s) -
Chandran Ambily,
Kuriakose Sunny,
Mathew Tessymol
Publication year - 2013
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3094
Subject(s) - lignin , photoisomerization , materials science , acetic acid , fourier transform infrared spectroscopy , thermal stability , fluorescence , absorption (acoustics) , photochemistry , organic chemistry , polymer chemistry , chemical engineering , chemistry , catalysis , optics , physics , isomerization , engineering , composite 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.