Phenothiazine-pyridyl chalcone:an easily accessible colorimetric and fluorimetric'on-off'dual sensing probe for Cu~(2+)

摘要

Phenothiazine-pyridyl chalcone,a new internal charge transfer(ICT)probe,has been designed that allows naked eye detection and a reversible,ratiometric'on-off sensing capability for biologically and environmentally significant Cu~(2+)in CH3OH-H2O(4:1 v/v)under buffered conditions.The association constants determined using spectrophotometric and the fluorimetric techniques follow the order Cu~(2+)>Ni~(2+)>Co~(2+)>Zn~(2+)>Cd~(2+)>Mg~(2+)approx=Ba~(2+)approx=Ca~(2+)approx=K~+approx=Na~+approx=Li~+.