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

被引：37

作者：

Nishimura, Akiko ^{[1
]}

Sagawa, Natsuko ^{[1
]}

Uchino, Takashi ^{[1
]}

机构：

[1] Kobe Univ, Grad Sch Sci, Dept Chem, Nada Ku, Kobe, Hyogo 6578501, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 11期

关键词：

PHOTOLUMINESCENCE CHARACTERISTICS; EMITTING CENTERS; HYDROLYSIS; MONOLAYERS;

D O I：

10.1021/jp900911v

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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)(2)SiO1/2. 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)(2)SiO1/2 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.

引用

页码：4260 / 4262

页数：3

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