Eun-Mi Lee et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 95, 25-28 (2012-05-23)
A squarylium (SQ) dye was synthesized by the reaction between squaric acid and 2,3,3-trimethylindolenine and its anion sensing properties were investigated using absorption and emission spectroscopy. This chemosensor exhibited high selectivity for CN(-) as compared with F(-), CH(3)CO(2)(-), Br(-), H(2)PO(4)(-)