Photochemistry and photophysics of copolymers of (-)menthyl acrylate with 4-hydroxystilbene acrylate

  • Altomare A
  • Carlini C
  • Ciardelli F
 et al. 
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Copolymers of trans-4-hydroxystilbene with (-)menthyl acrylate exhibit upon irradiation transåcis isomerization of the side-chain stilbene chromophores analogously to trans-4-hydroxystilbene-2-methylpropanoate, chosen as low molecular weight model compound. U.v. measurements on polymer samples indicate a deviation from first-order kinetics. In the fluorescence spectra of all-trans polymer samples both excimer and monomer emissions are observed. On irradiation the excimeric component is quenched much faster than the monomeric one. Fluorescence polarization experiments indicate a higher conformational rigidity of the stilbene chromophore when inserted in polymeric systems. Comparison of chiroptical properties of both unirradiated and irradiated copolymers suggests that on irradiation a local conformational rearrangement of macromolecules takes place. © 1983.

Author-supplied keywords

  • 4-hydroxystilbene acrylate
  • Photochemistry
  • chromophores
  • copolymers
  • isomerization
  • menthyl acrylate
  • photophysics

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  • Angelina Altomare

  • Carlo Carlini

  • Francesco Ciardelli

  • Roberto Solaro

  • Julien L. Houben

  • Nicola Rosato

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