Study of Specific Interaction between bis(p-phenylene)-34-crown-10-based Substituted Macrocycle and Ni2.

A novel macrocyclic host has been synthesized for the determination of Ni (II) ions in aqueous solution (H2O-CH3CN, v/v = 1:1). Its molecular structure has been verified by 1H-NMR, 13C NMR and mass spectrometry (ESI).This probe shows selectivity towards the presence of Ni (II) ion among various alkali, alkaline earth, and transition metal ions. The formation of a new fluorescence band at 311 nm has been detected due to possible complex formation with increasing Ni2+ concentration in the range of 10-5-10-4 M. The detection limit is calculated to be 5.22 μM. To our knowledge, it will be the first case for bis(p-phenylene)-34-crown-10 based molecules to recognize Ni2+ ions.