Abstract
Polysilsesquioxane xerogels have been prepared via hydrolysis and condensation of the sole precursor N-(3-Trimethoxysilylethyl)ethylenediamine (TMSEEDA) with no acid or base catalyzed sol–gel processing. Complex siloxane matrix is formed along with abundant and covalently linked ethylenediamine (EDA). After high temperature thermal treatment over 500 °C, EDA groups are completely decomposed. The as-synthesized sample exhibits strong blue emission at room temperature (RT), which is shifted to green and red bands when encountered high temperature annealing treatment (in air), promising potential applications in opto-electronics and sensor. Moreover, the PL mechanism is also discussed in details.
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