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

• 作者: Erika Espericueta Gerardo Ortega-Zarzosa José R. Martínez
• 来源期刊: 玻璃与陶瓷期刊(英文)
• 学科: 化学
• 关键词: Fluorescence SPECTRA SOL-GEL CHLOROPHYLL Extract LEAVES PHOTOSYSTEM II
• 年，卷（期）: 2011,（1）
• 页码范围: 7-12
• 页数: 6页
• 分类号: O6

摘要

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.