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Tuning the Photoluminescence of Silsesquioxanes with Short Substituted Urea Bridges
Author(s) -
Gómez María L.,
Fasce Diana P.,
Williams Roberto J. J.,
Previtali Carlos M.,
Matějka Libor,
Pleštil Josef,
Brus Jiří
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700499
Subject(s) - silsesquioxane , triethoxysilane , photoluminescence , urea , fourier transform infrared spectroscopy , polymer chemistry , disilane , condensation polymer , materials science , chemistry , silane , photochemistry , chemical engineering , organic chemistry , polymer , optoelectronics , engineering
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.