title: A turn-on and reversible fluorescence sensor for zinc ion.
abstract: A simple Schiff base type fluorescent receptor was prepared and evaluated for its fluorescence response to heavy metal ions. Receptor 1 exhibits an "off-on-type" mode with high selectivity in the presence of Zn(2+) ion. The addition of EDTA quenches the fluorescence of receptor 1-Zn(2+) complex, making receptor 1 a reversible chemosensor. The selectivity of 1 for Zn(2+) is the consequence of combined effects of CHEF, C=N isomerization and inhibition of ESIPT.
authors.affiliation: Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan.
authors.forename: Hsiang-Yi
authors.initials: HY
authors.lastname: Lin
authors.forename: Pi-Yun
authors.initials: PY
authors.lastname: Cheng
authors.forename: Chin-Feng
authors.initials: CF
authors.lastname: Wan
authors.forename: An-Tai
authors.initials: AT
authors.lastname: Wu
mesh_terms: D004492:Edetic Acid / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D013050:Spectrometry, Fluorescence; D015032:Zinc / Q000032:analysis*; D017967:Zinc Compounds / Q000032:analysis* / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D007477:Ions; D017967:Zinc Compounds; D004492:Edetic Acid; D015032:Zinc