Fluoride Research Today is a free monthly online journal that collates and summarizes the latest research about Fluoride, including details on toothpaste, water, treatment, dangers.

A high selective anion colorimetric sensor based on salicylaldehyde for fluoride in aqueous media.

Li J, Lin H, Cai Z, Lin H

Department of Chemistry, Nankai University, Ttianjin Weijin Road 94#, Tianjin 300071, People's Republic of China.

A new and simple salicylaldehyde-based sensor 1 designed for fluoride sensing has been investigated in DMSO and even in the 9/1 DMSO/H(2)O (v/v) mixtures. The affinity constants of receptor 1 for anionic species in the 9/1 DMSO/H(2)O (v/v) reveal that it is sensitive to F. Also, the color changes induced by anions can provide a way of detection by 'naked-eye'. These result can be substantiated by the spectrum changes upon the addition of 25equiv. anions to 1 in the 9/1 DMSO/H(2)O solution. The further insights to the nature of interactions between the sensor 1 and F(-) were investigated by (1)H NMR titration experiments in 9/1 DMSO-d(6)/H(2)O (v/v). In addition, the proposed binding mode between 1 and F(-) was suggested.

Published 16 March 2009 in Spectrochim Acta A Mol Biomol Spectrosc, 72(5): 1062-5.
Full-text of this article is available online (may require subscription).

© 2004-2010 Fluoride Research Today. All Rights Reserved.