Two pyrromethene BF 2 complexes are synthesized. Their structures have been comfirmed by IR spectra, 1H NMR spectra, mass spectra and elementary analysis. Sol gel method was used to dope these dyes in organic modified...Two pyrromethene BF 2 complexes are synthesized. Their structures have been comfirmed by IR spectra, 1H NMR spectra, mass spectra and elementary analysis. Sol gel method was used to dope these dyes in organic modified silicate (Ormosil). Their UV vis spectra, fluorescence spectra and photostability have also been tested.展开更多
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 tri...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-l , 10-phenanthroline) ruthenium ( ) ([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 dimethyl-dimethoxysilane (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 g/mL for O2 in the gaseous and the aqueous phases, respectively.展开更多
文摘Two pyrromethene BF 2 complexes are synthesized. Their structures have been comfirmed by IR spectra, 1H NMR spectra, mass spectra and elementary analysis. Sol gel method was used to dope these dyes in organic modified silicate (Ormosil). Their UV vis spectra, fluorescence spectra and photostability have also been tested.
基金NSFC(No.4001161946)and CRGC joint research project.
文摘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-l , 10-phenanthroline) ruthenium ( ) ([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 dimethyl-dimethoxysilane (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 g/mL for O2 in the gaseous and the aqueous phases, respectively.
