47843-41-4Relevant academic research and scientific papers
An anionic chromogenic sensor based on protonated Reichardt's pyridiniophenolate
Reis, Dalci C.,Machado, Clodoaldo,Machado, Vanderlei G.
, p. 9339 - 9342 (2007/10/03)
An anionic sensor based on Reichardt's betaine is described here. The dye is blue-green in chloroform but becomes colorless under protonation. Increasing amounts of different anions were added into the solution of the protonated dye. The addition of F- and H 2 PO4- caused the reappearance of the original blue-green color, while the addition of I- made the solution of the protonated dye yellow. The observations are discussed based on the fact that F- and H 2 PO4- can act as bases accepting a proton from the protonated dye and also in relation to the formation of a complex between the protonated dye and iodide.
