Abstract
Chemosensor (4a) shows fluorescence enhancement with Cu(II) and can estimate 1–300 μM Cu(II) by using fluorescence (1–20 μM) and UV–Vis (10–300 μM) spectroscopic techniques. Ni(II), Cd(II), Zn(II), Ag(I) and Hg(II) do not interfere in fluorescence studies and only Ag(I) and Hg(II) interfere in UV–Vis studies.