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2003 | 1 | 2 | 137-159
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Refractive index modulation in polymeric photochromic films

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
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.
Wydawca

Czasopismo
Rocznik
Tom
1
Numer
2
Strony
137-159
Opis fizyczny
Daty
wydano
2003-06-01
online
2003-06-01
Twórcy
  • Institute of Organic and Polymer Technology, Wrocław Technical University, 50-370, Wrocław, Poland
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Bibliografia
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