Two sensors based on π-extended TTF: synthesis and high selectivity for copper(II)

Two novel donor-π-acceptor chemosensors, exTTF-DPA and exTTF-ADPA, based on π-extended tetrathiafulvalene (exTTF) and di(pyridine-2-ylmethyl)amine (DPA) were synthesized and used as optical and electrochemical chemosensors for copper(II). The results showed that they possess specific selectivity for copper(II) in the presence of other competing metal ions (Zn2+, Sn2+, Pb2+, Pd2+, Hg2+, Al3+, Fe3+, Ag+, Co2+, Ni2+) in acetonitrile. Upon the addition of Cu2+, the solution color changed from yellow to orange, the cyclic voltammograms changed dramatically and the fluorescence quenched completely.

Graphical abstractDownload high-res image (224KB)Download full-size imageTwo exTTF-based optical and electrochemical sensors for selective and sensitive detection of copper(II) were prepared. Their solution color changed obviously from yellow to orange and cyclic voltammograms changed dramatically.