title: Colorimetric and fluorescence sensing of fluoride anions with potential salicylaldimine based schiff base receptors.
abstract: Salicylaldimine based schiff base receptors with different substituents showing fluorescent enhancement in the presence of fluoride anion was visualized through naked eye as well as by change in spectral properties (UV-vis and fluorescent techniques). The reason for such fluorescence enhancement may be due to hydrogen bond interaction between receptor recognition site and fluoride anion. Such a hydrogen bond interaction creates a six-membered transition state, which avoids quenching processes. To support this, fluorescence enhancement factor (FEF) was calculated and it was found to be more (FEF=652) for -NO(2) substituted receptor compared to other receptors.
authors.affiliation: Department of Chemistry, National Institute of Technology, Tiruchirappalli, India.
authors.forename: Radhakrishnan
authors.initials: R
authors.lastname: Sivakumar
authors.forename: Vijayaragavan
authors.initials: V
authors.lastname: Reena
authors.forename: Nallamuthu
authors.initials: N
authors.lastname: Ananthi
authors.forename: Muthiya
authors.initials: M
authors.lastname: Babu
authors.forename: Sambandam
authors.initials: S
authors.lastname: Anandan
authors.forename: Sivan
authors.initials: S
authors.lastname: Velmathi
mesh_terms: D000838:Anions / Q000032:analysis*; D003124:Colorimetry / Q000379:methods*; D005459:Fluorides / Q000032:analysis*; D006860:Hydrogen Bonding; D015394:Molecular Structure; D012459:Salicylates / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D000838:Anions; D012459:Salicylates; D012545:Schiff Bases; D005459:Fluorides