title: 1, 5-Bis (2-hydroxyacetophenone)thiocarbohydrazone: a novel colorimetric and fluorescent dual-mode chemosensor for the recognition of fluoride.
abstract: 1,5-Bis (2-hydroxyacetophenone)thiocarbohydrazone (H4L) has been synthesized and characterized by means of spectroscopic and single crystal X-ray diffraction methods. Interactions of the H4L with a variety of anions were investigated using a combination of UV-visible and fluorescence spectroscopic methods in a biological competing solvent DMSO. The H4L has a high degree of selectivity for fluoride over other anions. (1)H NMR titration experiments indicate that a deprotonation process is involved in the chemo sensing process.
authors.affiliation: Department of Chemistry, Centre of Excellence in Corrosion and Surface Engineering, National Institute of Technology, Tiruchirappalli, Tiruchirappalli 620015, Tamilnadu, India.
authors.forename: S L Ashok
authors.initials: SL
authors.lastname: Kumar
authors.forename: M Saravana
authors.initials: MS
authors.lastname: Kumar
authors.forename: R P
authors.initials: RP
authors.lastname: John
authors.forename: P Thomas
authors.initials: PT
authors.lastname: Muthiah
authors.forename: A
authors.initials: A
authors.lastname: Sreekanth
mesh_terms: D003124:Colorimetry / Q000379:methods*; D018360:Crystallography, X-Ray; D005459:Fluorides / Q000032:analysis*; D006835:Hydrazones / Q000737:chemistry*; D011789:Quantum Theory; D013057:Spectrum Analysis / Q000379:methods
chemical_list: C584664:1,5-bis(2-hydroxyacetophenone)thiocarbohydrazone; D006835:Hydrazones; D005459:Fluorides