title: Terphenyl-phenanthroline conjugate as a Zn2+ sensor: H2PO4(-) induced tuning of emission wavelength.
abstract: A new terphenyl-based macrocycle 5 incorporating phenanthroline as a fluorophore has been designed, synthesized and examined for its recognition ability toward various cations (Pb(2+), Hg(2+), Ba(2+), Cd(2+), Ag(+), Zn(2+), Cu(2+), Ni(2+), Co(2+), K(+), Mg(2+), Na(+) and Li(+)) by UV-vis, fluorescence and NMR spectroscopy. The receptor 5 showed highly selective 'Off-On' fluorescence signaling behavior for Zn(2+) ions in THF. Interestingly, the addition of H(2)PO(4)(-) ions to the [5-Zn] complex regulates the binding site for additional Zn(2+) ions and hence leads to a blue-shifted emission band.
authors: Department of Chemistry, UGC Sponsored Centre for Advanced Studies-I, Guru Nanak Dev University, Amritsar, India. vanmanan@yahoo.co.in
authors: Vandana
authors: V
authors: Bhalla
authors: Ruchi
authors: R
authors: Tejpal
authors: Manoj
authors: M
authors: Kumar
mesh_terms: D007477:Ions / Q000737:chemistry; D008670:Metals / Q000737:chemistry; D010618:Phenanthrolines / Q000737:chemistry*; D010756:Phosphoric Acids / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013730:Terphenyl Compounds / Q000737:chemistry*; D015032:Zinc / Q000032:analysis*
chemical_list: D007477:Ions; D008670:Metals; D010618:Phenanthrolines; D010756:Phosphoric Acids; D013730:Terphenyl Compounds; C030242:phosphoric acid; D015032:Zinc