Cyclams bearing diametrically disubstituted pyrenes as [Cu.sup.2} - and [Hg.sup.2} selective fluoroionophores

The synthesis of new cyclam derivatives with diametrically disubstituted pyrene fluorophores is described and their fluoroionophoric properties towards transition metal ions [Cu.sup.2} - and [Hg.sup.2} are studied. It is demonstrated that the diametrically disubstituted pyrene derivatives of cyclam exhibited a selective fluorescence quenching attitude towards [Cu.sup.2}- and [Hg.sup.2} ions in switching-off type responses in aqueous methanol or acetonitrile solution.