Isomerization kinetics of the merocyanine-spiropyran transformation in several poly(alkylo acrylates) are detected by time-resolved absorption spectroscopy. The decay of the colored merocyanine exhibits significant deviations from first-order patterns. The energy of activation can be separated into a stabilization energy for the isomer and an activation inherent to the amorphous matrix by observing the decoloration patterns for the corresponding photoisomerization. These observations can be explained by matrix effects in the isomerization modeled by statistics and fluctuations of matrix-site energies.
|Original language||English (US)|
|Number of pages||7|
|Publication status||Published - Apr 1988|
ASJC Scopus subject areas
- Materials Chemistry