A high selective anion colorimetric sensor based on salicylaldehyde for fluoride in aqueous media.
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.
Li
Jianwei
J
Department of Chemistry, Nankai University, Ttianjin Weijin Road 94#, Tianjin 300071, People's Republic of China.
Lin
Hai
H
Cai
Zunsheng
Z
Lin
Huakuan
H
D000447:Aldehydes / Q000737:chemistry*; D000838:Anions / Q000737:chemistry*; D003124:Colorimetry / Q000379:methods*; D005456:Fluorescent Dyes / Q000737:chemistry*; D005459:Fluorides / Q000032:analysis*; D015394:Molecular Structure; D013056:Spectrophotometry, Ultraviolet; D014867:Water / Q000737:chemistry*
D000447:Aldehydes; D000838:Anions; D005456:Fluorescent Dyes; D014867:Water; C013243:salicylaldehyde; D005459:Fluorides