Effect of halogen substitution on azo-naphthol dye based poly(alkyloxymethacrylate)s and their Z-scan measurements

A series of photo addressable polymers bearing azo-naphthol moiety in the polymer side chain containing polymethacrylate backbone were synthesized for NLO applications. Various halogen atoms were substituted in the para position of the side chain azobenzene, and the effects of the substituents were...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2009-09, Vol.20 (9), p.835-843
Main Authors: Rosalyn, P. Delphia Shalini, Kannan, P., Vinitha, G., Ramalingam, A.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Glass transitions
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Materials Science
Nuclear magnetic resonance and relaxation
Optical and Electronic Materials
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
Physics
Polymers
Specific phase transitions
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Summary:A series of photo addressable polymers bearing azo-naphthol moiety in the polymer side chain containing polymethacrylate backbone were synthesized for NLO applications. Various halogen atoms were substituted in the para position of the side chain azobenzene, and the effects of the substituents were investigated. The polymers were characterized by UV, FT-IR, 1 H-NMR and 13 C-NMR spectroscopy. The photoisomerization property of all the polymers shows a clear dependence on the size of the halogen, indicating the rate of the switching time in the increasing order of F > Cl > Br > I. The glass transition temperature and thermal stability of the polymers were analyzed by DSC and TGA respectively. The third order nonlinear optical properties of the polymer film were measured by the Z-scan technique using Ar-ion laser and exhibited negative optical nonlinearity. The results revealed that these polymers possess potential applications in nonlinear optics and the value of nonlinear susceptibility for the iodine substituted polymer is higher than the other halogen substituted polymers chosen in the study.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-008-9803-1