基于四(对-氨基苯基)卟啉的宽酸度响应范围的pH荧光化学传感器的研究  

Tetra(p-amino-phenyl)porphyrin based optical fiber chemical sensor for measurement of pH with wide range

作　　者：方正辉[1,2] 周敬良[1] 万其中[1,2] 张晓兵[1] 

机构地区：[1]湖南大学化学化工学院,化学生物传感与计量学国家重点实验室 [2]岳阳职业技术学院,湖南岳阳414000

出　　处：《化学传感器》2008年第1期49-53,共5页Chemical Sensors

摘　　要：论文合成了几种卟啉化合物并考察了以它们作为荧光载体的光化学传感器对pH的响应性能。该传感器的响应是基于卟啉化合物在酸性条件下可以发生多步质子化过程而产生的荧光淬灭现象。由于具有多个质子敏感中心,以5,10,15,20-四(对-氨基苯基)卟啉[T(p-NH2)TPPH2]为载体的荧光化学传感器对pH的响应范围比5,10,15,20-四苯基卟啉的要宽得多。论文考察了膜组成对传感器响应性能的影响,并对实验条件进行了优化。经优化膜组成后的T(p-NH2)TPPH2传感器对pH的响应范围为0.50～6.30,响应时间为3min,该传感器表现出良好的可逆性和重现性,常见的阳离子对其检测pH无明显的干扰。The synthesis of several porphyrins and their application for preparation of optical fiber chemical pH sensors are described. The response of the sensor is based on the fluorescence quenching of porphyrin owing to multiple steps of protonation in acidic condition. Due to containing several proton sensitive centers, tetra（p-amino-phenyl）porphyrin based optode shows wider response range toward pH than that of tetraphenylporphyrin. It shows a linear pH response in the range of 0.50～ 6.30, with a response time of 3 min. The effect of the composition of the sensor membrane has been studied and the experimental conditions optimized. The optode shows good reproducibility and reversibility, and common co-existing cations did not show obvious interfering to its pH measurement.

关 键 词：卟啉 光化学传感器 PH测量 荧光淬灭 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]