Design and Synthesis of Hexafluoroisopropyl Alcohol Functionalized Polymers for Chemical Warfare Agent Detection with a Quartz Crystal Microbalance

摘要

Novel hexafluoroisopropyl alcohol (HFIPA) functionalized polymers were designed and synthesized for the gas-phase detection of toxic nerve agent simulants such as dimethyl methylphosphonate (DMMP) using a quartz crystal microbalance (QCM). We incorporated the HFIPA group to increase the binding capacity of DMMP through hydrogen bonding. At present, we have prepared five kinds of polymers based on norbornenes with different ratios of the HFIPA group and found that frequency shifts were linear to the concentration of DMMP in the range of 10-60 ppm. As the HFIPA units in the polymer backbone were increased from 0% to 30%, the sensitivity of DMMP detection increased linearly. However, as the HFIPA units in the polymer backbone were increased from 30% to 100%, the sensitivity to DMMP detection slowly decreased, presumably due to intramolecular hydrogen-bonding of HFIPA moieties.