Dual chemosensing properties of new ferrocene-based receptors towards fluoride and copper(II) ions

Article abstract of DOI:10.1016/j.inoche.2011.06.016

The new ferrocene based receptors N-[4-ferrocenyl-2-methyl-4-oxobut-1-enyl] -N′-phenylthiourea (1), N-[4-ferrocenyl-2-methyl-4-oxobut-1-enyl]- N′-[4-nitrophenyl]thiourea (2) were synthesized and characterized. Fluorescence titrations of receptors 1 and 2 with various transition metal ions showed selective response to Cu²⁺ ions and the emission intensities quenched significantly. Electrochemical titrations with anions revealed that receptors 1 and 2 sensed the F^- anion in high selectivity with a cathodic shift of 100 mV.