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Journal of Materials Science

, Volume 42, Issue 18, pp 7866–7871 | Cite as

Optical switching of a photochromic bis-phenylazo compound in PMMA films

  • Maria Cristina LarcipreteEmail author
  • Danilo Dini
  • Raffaella Ostuni
  • Concita Sibilia
  • Mario Bertolotti
  • Xavier Alvarez-Mico
  • Rafael Gomez-Bombarelli
  • Mirko Cappeddu
  • Michael Scalora
  • Mark J. Bloemer
Article

Abstract

We present our results on a newly synthesized bis-phenylazo derivative, namely bisperfluoroalkylsulfonylamino- arylazomethylene-triphenyl-phosphorane (BAM-TPP). Thin films of BAM-TPP in polymethylmethacrylate (PMMA) matrix were prepared. The films (thickness, d < 60 μm) were exposed to UV-vis light with variable intensity in order to stimulate the photochromic reaction of BAM-TPP. The resulting absorption changes of the BAM-TPP/PMMA films were investigated by spectrophotometry. The absorption spectra reveal that BAM-TPP molecules in PMMA undergo photoisomerization with resulting decrease of absorbance in the range 500–700 nm. Finally, the time response of film transmittance at 514 nm under increasing CW light intensity was recorded, showing that the reverse photochromic process brings the absorbance back to its pristine value. The obtained films thus proved to be suitable for optical switching applications.

Keywords

PMMA Azobenzene Optical Switching Incident Power Intramolecular Proton Transfer 

Notes

Acknowledgements

S. Macri at the Instituto Superiore di Sanità (Rome, Italy) is gratefully acknowledged for helpful discussion. This work was supported by EU NoE Phoremost.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Maria Cristina Larciprete
    • 1
    Email author
  • Danilo Dini
    • 2
  • Raffaella Ostuni
    • 1
  • Concita Sibilia
    • 1
  • Mario Bertolotti
    • 1
  • Xavier Alvarez-Mico
    • 2
  • Rafael Gomez-Bombarelli
    • 2
  • Mirko Cappeddu
    • 3
  • Michael Scalora
    • 3
  • Mark J. Bloemer
    • 3
  1. 1.INFM, Department of EnergeticsUniversity of Rome “La Sapienza”RomaItaly
  2. 2.Institute of Organic ChemistryUniversity of TübingenTubingenGermany
  3. 3.AMSRD-WS-ST Charles M. Bowden Research CenterHunstsvilleUSA

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