1, 5-Bis (2-hydroxyacetophenone)thiocarbohydrazone: A novel colorimetric and fluorescent dual-mode chemosensor for the recognition of fluoride

• DOI: 10.1016/j.msec.2013.02.012
• Publication Date: 2013-02-18T11:03:28Z
• Authors: S.L. Ashok Kumar; M. Saravana Kumar; R.P. John; P. Thomas Muthiah; A. Sreekanth
• Keywords: Proton NMR

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.