TITLE:
Effect of Aging in the Structure of Silica Xerogels with Incorporation of Extract’s Leaves
AUTHORS:
José R. Martínez, Erika Espericueta, Gerardo Ortega-Zarzosa
KEYWORDS:
Fluorescence Spectra; Sol-Gel; Chlorophyll; Extract Leaves; Photosystem II
JOURNAL NAME:
New Journal of Glass and Ceramics,
Vol.1 No.1,
March
28,
2011
ABSTRACT: The spectral fluorescence characteristics of extracts leaves embedded in silica xerogel matrix promoted by aged time was studied. We obtain a higher PSII stability for extract of leaves embedded in xerogel matrix, with concentration of 8 g / 20 ml and water to TEOS molar ratio of 11, which remain bioactive over a very long period of time, whereas for a water to TEOS molar ratio of 5 a blue-shift fluorescence is observed indicating the PSII denaturizing and formation of fluorescing aggregates associated with the activation of carotenoids radicals.