Refractive index modulation in polymeric photochromic films

• Authors: Ewelina Ortyl , Stanisław Kucharski
• Languages of publication: EN

Abstracts

EN

Photochromic properties of methylacrylate monomers and polymers containing azobenzene groups with heterocyclic sulfonamide functionalities viz sulfisomidyne (4-amino-N-[2,6-dimethylpyrimidyn-4-yl]benzenesulfonamide) and sulfamethoxazole (4-amino-N-[5-methylisoxazol-3-yl]benzenesulfonamide) substituents were investigated. On illumination with light the azobenzene group underwent trans-cis isomerisation, which was manifested by a drop in the absorbance of the maximum absorption peak at ca. 450 nm and by decrease in refractive index.Quantum chemical calculations showed significant differences in UV-VIS spectra, dipole moments, polarizability and refractive index between both cis and trans form of the chromophoric monomers.The illumination of spin-coated polymer films during ellipsometry measurements resulted in a change in refractive index within the range of 0.014 to 0.025. The dynamics of growth and decay of refractive index changes, was described by biexponential functions approach.

Keywords

EN

photochromic polymers; refractive index modulation; trans-cis isomerisation

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2003
• Volume: 1
• Issue: 2
• Pages: 137-159

Dates

published

1 - 6 - 2003

online

1 - 6 - 2003

Contributors

author

Ewelina Ortyl

• Institute of Organic and Polymer Technology, Wrocław Technical University, 50-370, Wrocław, Poland

author

Stanisław Kucharski

• Institute of Organic and Polymer Technology, Wrocław Technical University, 50-370, Wrocław, Poland

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Identifiers

DOI

10.2478/BF02479265