Abstract In this study, a new fluorescent sensor was occurred from pyrene-substituted calix4arene derivatives and its usability in the detection of Cu 2+ ions and triazole-based pesticides was investigated. Calix4arene derivatives formed complexes that exhibited an "on–off-on" fluorescence response by interacting with pesticides containing triazole groups and showed significant changes in their optical properties. This innovative sensor plays an effective binding role especially for Cu 2+ ions and the change in the fluorescence properties of the complexes formed with these ions can be used for the detection of pesticides. In the study, "turn-on–off-on" fluorescence responses were observed as a result of the interaction of calix4arene-pyrene complex with triazole-based pesticides (tebuconazole, tetraconazole, penconazole and difenoconazole). In addition, it is emphasized that the sensor is a potential tool for the rapid and sensitive detection of pesticides, which are important in terms of environmental pollution and food safety. The results obtained show that calix4arene derivatives have great potential in the detection of environmental pollutants and in the development of optical sensors sensitive to these pollutants. Graphical Abstract
Güngör et al. (Sat,) studied this question.