Aggregation-induced fluorescent response of urea-bearing polyphenyleneethynylenes toward anion sensing.

ABSTRACT: A π-conjugated urea-bearing phenyleneethynylene polymer (Poly-2) was rationally designed by the Sonogashira coupling condensation reaction and had been demonstrated to have a unique fluorescent quenching effect for the optical detection of all determined anions, especially for CN^-. The fluorescent emission of Poly-2 was significantly quenched upon adding CN^-, together accompanied with a continuous red shift of the emission peak from 442 to 464 nm with the cyanide concentration increased from 0 to 1.0 mM. On the contrary, its precursor polymer, Poly-1, itself also displayed fluorescent responsibility with all selected anions but had no obvious selectivity and tendency. For instance, the addition of highly basic CN^-, N₃ ^-<

SUBMITTER: Li J 

PROVIDER: S-EPMC8344232 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature