2025 年 56 巻 2 号 p. 75-82
Chemosensors are analytical tools at the molecular level that allow visualization of chemical information through optical changes. Owing to their inherent cross-reactivities, chemosensors on an array enable multianalyte sensing based on pattern recognition. Polythiophene derivatives as chemosensors can be easily functionalized with molecular recognition moieties at the 3- and/or 4-position of thiophene rings. Upon analyte capture at side chains, various optical changes of polythiophene are induced by molecular wire effects and dynamic structural changes in the π-conjugated systems. The beneficial properties of polythiophene contribute to obtaining information-rich chemical information to discriminate analytes qualitatively and quantitatively in both solution and solid states. This short review summarizes the potential of amphipathic polythiophene derivatives for chemosensors and their arrays.