Effect of Aging in the Structure of Silica Xerogels with Incorporation of Extract’s Leaves

José R. Martínez, Erika Espericueta, Gerardo Ortega-Zarzosa

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DOI: 10.4236/njgc.2011.11002                

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.

Keywords

Fluorescence Spectra; Sol-Gel; Chlorophyll; Extract Leaves; Photosystem II

Conflicts of Interest

The authors declare no conflicts of interest.

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