Structural Origin of Visible Luminescence from Silica Based Organic−Inorganic Hybrid Materials

Autor:	Natsuko Sagawa, Akiko Nishimura, Takashi Uchino
Rok vydání:	2009
Předmět:	Materials science Silicon Analytical chemistry chemistry.chemical_element Mineralogy Quantum yield Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy chemistry Organic inorganic Physical and Theoretical Chemistry Hybrid material Luminescence
Zdroj:	The Journal of Physical Chemistry C. 113:4260-4262
ISSN:	1932-7455 1932-7447
DOI:	10.1021/jp900911v
Popis:	We synthesized a series of n-octadecylsiloxanes having different empirical formulas, that is, R-SiO3/2 (R = C18H37), R-(CH3)SiO2/2, and R-(CH3)2SiO1/2. We found that the compound with the formula R-SiO3/2 shows the highest PL emission with a quantum yield of 19 ± 0.5%, whereas the compound with the formula R-(CH3)2SiO1/2 hardly shows the PL output. The present results clearly demonstrate that carbon-related species are not responsible for the PL; rather, the PL emission results from some silicon/oxygen-related defect species. On the basis of the present experimental findings, a structural origin of the PL from silica based organic−inorganic hybrid materials is proposed.
Databáze:	OpenAIRE
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