Time resolved ultraviolet photoluminescence of mesoporous silica

被引：27

作者：

Anedda, A

Carbonaro, CM ^{[1
]}

Clemente, F

Corpino, R

Ricci, PC

机构：

[1] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, Ca, Italy

[2] INFM, UdR Cagliari, I-09042 Monserrato, Ca, Italy

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 03期

关键词：

D O I：

10.1021/jp0471397

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 studied the optical properties of sol-gel synthesized porous silica excited by synchrotron radiation in the 4-10 eV range. The spectral and temporal characteristics of the ultraviolet photoluminescence at about 3.7 eV are reported. The UV emission results from the contribution of two different centers: the first one centered at 3.7 eV with a decay time of 2.0 ns and the second one peaked at 3.9 eV with a decay time of 20 ns. We propose to assign the observed luminescence to different interacting surface silanols.

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页码：1239 / 1242

页数：4

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