摘要
为提高极性荧光指示剂Ru(dpp)3Cl2在非极性硅橡胶中的分散性,以沉淀白炭黑、气相白炭黑和甲基MQ树脂,载负荧光指示剂Ru(dpp)3Cl2,再填充到二甲基硅橡胶(PDMS)中,制备氧敏感荧光膜。以分光光度计和荧光光谱仪,研究载体种类对Ru(dpp)3Cl2的吸附性、荧光特性及氧敏感荧光膜性能的影响。白炭黑载负Ru(dpp)3Cl2的荧光发射光谱相对其稀溶液约红移20nm。载体表面的甲基可减弱SiO2载体对Ru(dpp)3Cl2分子的吸附性和相互作用,减少荧光发射光谱的红移12nm,提高荧光强度近10倍。白炭黑有助改善Ru(dpp)3Cl2在PDMS中的分散性和氧敏感荧光膜的荧光输出和猝灭比,尤以MQ树脂的效果最为显著。
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 redshift 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.
出处
《影像科学与光化学》
CAS
CSCD
北大核心
2015年第3期211-217,共7页
Imaging Science and Photochemistry
