摘要:
1-(4-acetyl-phenyl)-3-(4-N,N-dimethylaminopheny1)-thiourea is synthesized and characterized by NMR, IR, MS and elemental analysis. The probe exhibits the "turn-off" fluorescence response to iodide anion in THF/H2O (v/v = 9/1) pH =7.4 Tris HCl buffer solution, which is attributed to the intramolecular charge transfer (ICT). It is found that the probe has a detection limit of 0.336 p.M. Such interesting results could be further supported by quantum chemical calculation, UV and H-1 NMR titration. Moreover, the probe is applied to determine iodide in powdered milk and urine samples. This experiment shows a good agreement between added and detected concentration of the iodide in real samples. (C) 2014 Elsevier B.V. All rights reserved.