Synthesis And Properties Of Polymeric Dissolved Oxygen Sensor Based On Porphyrin Unit

Oxygen, as an extremely important substance on the earth, its measurement in every aspect of our lives is in a wide range of applications. Optical fiber technology has been gradually developed in recent years. At the same time, microbial reactor, because of its smaller reactor volume, a high level of work parallel, effective control technology and other characteristics, has obtained more and more attention. The application of fiber optic oxygen sensor in the microbial reactor has become one of hot areas with wide application prospects.The dissertation is focused on the design and synthesis of novel polymer oxygen sensors P(Pt-TPP-TFEMA) containing the chromophore of tetraphenylporphyrin (TPP). We also introduced hydrophobic fluoro groups into the backbone of the polymer for the sake of increasing the permability of oxygen and improving the sensitivity of the sensor. At the same time, we synthesized compound P(Pt-TPP-EMA) containg alkyl groups as a reference system.We tested these two kinds of polymers in solution and solid film, respectively. We found that Int. de O2/Int. sat O2=8.3 in the P(Pt-TPP-TFEMA) acetonitrile solution, Int. de O2/Int. sat O2=6.4 in the P(Pt-TPP-EMA) acetonitrile solution, and Int. de O2/Int. sat O2=4.0 in P(Pt-TPP-TFEMA) film, as well as Int. de O2/Int. sat O2=3.0 in the P(Pt-TPP-EMA) film. Thus it can be seen that the introduction of three fluoro-substituted methyl groups can enhance the permeability and hydrophobicity of dissolved oxygen in water, and increase the oxygen and recognition of the groups contact response rate with better anti-fatigue performance.