925102-84-7Relevant academic research and scientific papers
Selective and colorimetric fluoride chemosensors containing phenol hydroxyl and 1,3,4-oxadiazole groups
Ma, Jiantao,Li, Zhe,Zong, Yanqing,Men, Yi,Xing, Guowen
, p. 1348 - 1351 (2013)
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 CH2Cl2/CH3CN (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-. Copyright
