Turn-on fluorescence response upon anion binding to dimesitylboryl-functionalized quaterthiophenef

摘要

Addition of CN or F to the B-functionalized quaterthiophene QTB induces a rapid change in the emission color from yellow to blue and blue-green, respectively, accompanied by a strong fluorescence turn-on. Structural analyses and TD-DFT calculations suggest that both the conformation of the conjugated backbone and the nature of the anion have a critical impact. The recognition of anions has over the past several years developed into an area of focused research interest. Specifically, fluoride is found in many common household products, including toothpaste, vitamins, dietary supplements, etc.; ingestion of fluoride-containing products such as insecticides and rodenticides can be dangerous or fatal.