A new simple and multifunctional fluorescent probe based on pyrene linked through an imine bond to ahydroxyphenol unit was synthesised, fully characterized and investigated in solution. Additionally, itsbehaviour in the presence of several ions (Hþ, Zn2þ, Cd2þ, Cu2þ, Ni2þ, Pb2þ, Fe2þ, Hg2þ and Al3þ) wasinvestigated in CH2Cl2. It was found that the absorption spectra of probe 1 shows no differences for allions titrations except in the presence of Hþ and Hg2þ where a new longer wavelength band becomesvisible (inducing a colour change from yellow to orange and pink, respectively). In the emission, a blueshiftand an enhancement of the fluorescence of the probe for all metal ions was observed with theexception of Al3þ where no detectable changes could be observed. The probe was found to be selectivefor Hg2þ ion at low concentrations (till one equivalent).
- Mercury (II)
- Molecular probes