Abstract
An organically modified silicate (ORMOSIL) based optical sensor response to gaseous O2 or O2 dissolved in water is presented. The oxygen sensing film mechanism is based on the principle of fluorescence quenching of tris(4,7-diphenyl-1,10-phenanthroline) ruthenium (II) ([Ru(dpp)3]2+), which has been entrapped in a porous ORMOSIL film. In order to establish optimum film-processing parameters, comprehensive investigations, including the effects of the polarity and the hydrophobicity of the sensing film on oxygen quenching response and response time, were carried out. The film hydrophobicity increased as a function of dimethyldimethoxysilane (DiMe-DMOS) content, which is correlated with enhanced oxygen sensor performance. The sensor developed in the present work exhibits the advantages of fast response time and good reversibility. The detection limits are 0.5% and 0.3 μg/mL for O2 in the gaseous and the aqueous phases, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 374-379 |
| Number of pages | 6 |
| Journal | Chemical Research in Chinese Universities |
| Volume | 17 |
| Issue number | 4 |
| Publication status | Published - 1 Nov 2001 |
| Externally published | Yes |
Keywords
- Fluorescent quenching
- Organically modified silicate
- Oxygen
- Sensor
ASJC Scopus subject areas
- Chemistry(all)
- Education