Study Of Fluorescent Polymer Synthesis And Their Fluorescence Response With TNT

Several fluorescence polymers, which can be used as sensitive materials in chemosensor, were synthesized in this thesis. Fluorescence response and fluorescence quenching efficiency of these polymers to trace TNT with various concentrations are researched.TNT is a main component of explosives, and it was found in 21 kinds explosives. So the existence of TNT is a serious threat to human safety and social stability, meanwhile, TNT is also polluting environment. Therefore, it is very useful to find a simple and effective method for detecting trace TNT.There are five chapters in this thesis, in chapter one, methods used for detect trace explosives are summarized. Compared with other methods, chemosensors had many advantages in detecting explosives, such as quick response, high sensitivity and can be used for in-situ detection.In chapter two, fluorescence response of coumarin upon exposure to TNT is studied; then in chapter three, we synthesized two polyaniline (PAn) derivants with coumarin and Cu-phthalocyanine functional group in side chain respectively. Both of them have higher fluorescence intensity than coumarin, and they can response to trace TNT, though not very obviously.A series of poly(p-phenylene vinylene) (PPV) derivants are synthesized and characterized in chapter four. By react functional group in side chain, the solubility of polymers was improved and they can form film easily. All of them had a good fluorescence response to TNT with a concentration of ppm (part per million) level, the polymer film prepared by a novel method can even response to ppb (part per billion) level TNT obviously.Conclusions are summarized in chapter five, and some new fluorescence polymers are designed on the basis of our research.