Spectral characterization of chlorophyll fluorescence in extract of barley leaves embedded in silica xerogel matrix Article uri icon


  • We have used the sol-gel method to prepare SiO2 based matrix containing barley leaves extracts and studied the spectral characteristics of chlorophyll fluorescence of the glass under structural evolution promoted by heat treatment. One primary effect on the fluorescence for barley leaves embedded in glass is that PSII chlorophyll fluorescence transients are not present. We obtain a higher PSII thermostability for leaves embedded in xerogel matrix than in the green barley leaves. We observed for high temperatures that fluorescing aggregates are formed. The behavior of the PSII fluorescence under heat treatment will be used in subsequent works to study the microstructural evolution during the silica-gel-glass conversion and their optical properties.

publication date

  • 2006-01-01