meso-四(4-甲氧基苯基)卟啉在传感元件中的应用研究

Meso-Tetrakis(4-methoxyphenyl)porphyrin for Sensor Element Applications

将meso-四(4-甲氧基苯基)卟啉(TMP)作为传感材料,K^(+)离子交换玻璃光波导(OWG)作为传感元件基底,通过氢氧化钠和盐酸调节卟啉溶液的pH值,将不同pH值的卟啉溶液通过旋转甩涂法固定于K^(+)离子交换玻璃光波导表面制备出传感元件,并对其气敏性进行研究。实验结果表明,利用不同pH值的卟啉溶液制备的传感元件具有不同的气敏特性。其中,pH值为1.00的卟啉溶液制备的传感元件对乙二胺气体具有良好的选择性响应,用原溶液(pH=5.06)制备的传感元件对硫化物气体(H_(2)S,SO_(2))表现出较高的灵敏度。

Meso-tetrakis(4-methoxyphenyl)porphyrin(TMP)was used as the sensing material and a K^(+)-ion exchanged glass optical waveguide(OWG)was employed as sensing base.The pH value of the porphyrin solution was adjusted by sodium hydroxide and hydrochloric acid.And the porphyrin solutions with different pH fixed on the K^(+)-ion exchanged glass optical waveguide surface by spin-coating method to developed the TMP film/K^(+)-ion exchanged glass optical waveguide sensors,the gas sensitivity of each prepared sensing element was studied,and the effect of the pH of the TMP solution and the aggregation shape of TMP in the sensor film on the gas-sensitivity of the OWG sensor was investigated.The experimental results reveal that the sensor prepared using a pH=1.00 of TMP solution is very responsive to ehanediamine gas.The sensor prepared using the original solution exhibited an excellent response toward sulfide gases(H_(2)S,SO_(2)).