Tuning the Photoluminescence of Silsesquioxanes with Short Substituted Urea Bridges
✍ Scribed by María L. Gómez; Diana P. Fasce; Roberto J. J. Williams; Carlos M. Previtali; Libor Matějka; Josef Pleštil; Jiří Brus
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 219 KB
- Volume
- 209
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
The polycondensation of a precursor synthesized by the reaction of 3‐(anilinepropyl)trimethoxysilane with 3‐(isocyanatopropyl)triethoxysilane led to a silsesquioxane bearing a substituted urea group in the short organic bridge. The self‐assembly of organic bridges, analyzed by SAXS and FTIR spectra, could be controlled by varying the conditions of the synthesis. Depending on the size of organic clusters, the silsesquioxane exhibited photoluminescence either in the green or red regions of the spectra, or an emission that could be tuned in the whole visible region by the excitation wavelength.
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