Jiantao Ma, Zhe Li, Yan Zong
Mar 13, 2013
Citations
0
Influential Citations
22
Citations
Journal
Tetrahedron Letters
Abstract
Abstract Two novel anion sensors, methyl 4-(5-(5-chloro-2-hydroxyphenyl)-1,3,4-oxadiazol-2-yl) benzoate ( L1 ) and methyl 4-(5-(2-hydroxyphenyl)-1,3,4-oxadiazol-2-yl) benzoate ( L2 ) were reported. Their spectroscopic and colorimetric properties in CH 2 Cl 2 /CH 3 CN (1:2, v/v) solution for F − sensing were investigated by naked-eye, UV–vis, and fluorescence measurements. Both molecules with coplanar structure possess adjacent phenolic hydroxyl and 1,3,4-oxadiazole units, resulting in a sufficiently strong intramolecular hydrogen bond to hinder the association of most anions, but not F − , with phenolic hydroxyl hydrogen. They displayed the same color changes from colorless to yellow but different optical shifts upon addition of F − .