四(4-溴)苯基铂卟啉荧光猝灭氧传感器的研究

Response Characteristic of Thin Film Oxygen Sensor: Pt-T(p-Br)PP in PVC Film

研究了以PVC膜为支持体系 ,以四 (4 -溴 )苯基铂卟啉为敏感物质的荧光猝灭氧传感器对分子氧的响应特性 .该氧传感器敏感膜的最大激发波长为 4 0 2nm ,最大发射波长为 6 6 4nm ,分子氧可以有效地猝灭四 (4 -溴 )苯基铂卟啉敏感膜的荧光 .在 10 0 %N2 和10 0 %O2 中的荧光强度之比大于 4 0倍 ;在N2 饱和和空气饱和的水中荧光强度之比大于 14倍 ,有较高的灵敏度 .其寿命大于 3个月 .

This paper presents a new fluorescence oxygen sensor with Pt-T(p-Br)PP as its sensing material and PVC polymer as its support system. When the maximal activated wavelength of the sensitivity film of this sensor is 402 nm and the maximal emitting wavelength is 664 nm, molecular oxygen can effectively quench the fluorescence from the Pt-T(p-Br)PP sensitivity film. The ratio of fluorescence intensity in 100% N 2 and 100% O 2 is 40 times higher and the ratio of the fluorescence intensity in water with saturated N 2 and air is 15 times higher, and the sensor has a high sensitivity with a lifetime of over 3 months.