Imaging Science and Photochemistry ›› 2015, Vol. 33 ›› Issue (3): 211-217.DOI: 10.7517/j.issn.1674-0475.2015.03.211

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Effect of Phosphor Carriers on Fluorescence of Ruthenium Phenanthroline and Performance of Oxygen-sensitive Fluorescent Membranes

LI Jianxiong1, ZUO Chen2, CHEN Jianming3, LI Bingwei3   

  1. 1. School of Material Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China;
    2. Guangdong Shengyi Technology Co., LTD, Dongguan 523039, Guangdong, P. R. China;
    3. Xinhui Kangyu Control Systems Engineering Inc, Jiangmen 529100, Guangdong, P. R. China
  • Received:2014-09-06 Revised:2014-12-26 Online:2015-05-15 Published:2015-05-15

Abstract:

To increase the dispersion of polar phosphor Ru(dpp)3Cl2 in apolar silicone rubber and produce oxygen-sensitive fluorescent membranes with high performance, fumed silica, precipitated silica and MQ resin were adopted as phosphor carriers to adsorb Ru(dpp)3Cl2 from solution, then added to polydimethylsiloxane and cast into fluorescent membranes. The adsorbing ability of the carrier to Ru(dpp)3Cl2 was evaluated with spectrophotometer and the effect of the carrier on the fluorescent characteristics of Ru(dpp)3Cl2 was analyzed with spectroscope. The effect of the carrier on the performance of the oxygen-sensitive fluorescent membranes was studied. Compared to the fluorescent spectrum of Ru(dpp)3Cl2 in ethanol solution, the fluorescent emission spectra of Ru(dpp)3Cl2 red shifted 20 nm after adsorbed on silica. Methyl group onto silica depressed the interaction of silica with Ru(dpp)3Cl2 and the amount of adsorbed Ru(dpp)3Cl2. MQ resin could reduce the red-shift of fluorescent emission spectrum more than 10 nm and increase the fluorescence intensity by 10 times. In oxygen-sensitive fluorescent membranes, MQ resin could increase the dispersion of Ru(dpp)3Cl2 in PDMS and improve the fluorescent output of the membranes.

Key words: Ruthenium phenanthroline, fluorescence, MQ resin, PDMS, dissolved oxygen sensor