Conjugated Aromatics and Polymers for Chemical Sensors
발표자
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초록
내용
In this talk, synthetic strategies to obtain lithium- and amine-sensing materials will be discussed. This talk is largely composed of two parts. First, lithium sensors based on naphthalene derivatives will be discussed. Lithium sensing is of great significance owing to the efficient lithium mining, lithium purification, and the detection of lithium leakage in electric vehicles. To achieve this, naphthalene functionalized with 12-crown-4 was synthesized in one step through Buchwald-Hartwig amination. The naphthalene derivative presented photophysical changes upon exposure to lithium ions. Second, chemiresistive amine sensors will be presented. Functionalized poly(3-hexylthiophene) (P3HT) having highly electrophilic trifluoromethyl ketone was synthesized. This P3HT was mixed with carbon nanotube (CNT), and this composite was drop-casted on gold electrode. Exposure to amine vapor, which is nucleophilic, showed three times higher sensitivity owing to the presence of electrophilic trifluoromethyl ketone, as compared to unmodified P3HT/CNT counterpart.