Recently, the Jilin Provincial Science and Technology Development Plan project undertaken by the Changchun Institute of Applied Chemistry of the Chinese Academy of Sciences, "Crosslinked Conductive Polymer Materials and Their Applications in Analytical Chemistry", passed the expert identification organized by the Jilin Provincial Department of Science and Technology. The expert group believes that this device is the first in China, and the related research results are highly innovative, reaching the leading level of domestic similar research.
It is understood that ion detection technology has extremely important significance in modern industry, biotechnology and environmental protection. For example, with the development of modern industry, a large number of metal cations discharged into the surrounding environment, such as lead, mercury and other heavy metal cations, are extremely harmful to the human body, and the detection and treatment of important ions have become a very important issue. In the electrochemical analysis and detection of ions, ion-selective electrodes have always been a commonly used quick and simple detection method. However, the existing conductive polymer composite membrane material has the disadvantages of being easy to fall off from the electrode surface, swelling, poor stability, and poor reproducibility.
Niu Li, a researcher at the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, led the Materials Electrochemistry Research Group and undertook in 2005 "Cross-linked conductive polymer materials and their applications in analytical chemistry." For the first time, they introduced bisthiophene monomers connected by flexible chains into conductive polymers, synthesized bisthiophene monomers with flexible chains and special functional groups, and prepared three-dimensional adjustable cavity molecules based on conductive polythiophene. The structure of the new network conductive polymer, through the functional group on the flexible chain, directly imparts species selectivity to the body of the conductive polymer film. The cavity structure in the conductive polymer membrane with cross-linked structure can be controlled by adjusting the proportion of polymer monomers and the length of the flexible chain, thereby achieving selective response to the target species, which is in the field of analytical detection and separation and enrichment It is widely used.
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