34111-42-7Relevant academic research and scientific papers
Syntheses and UV-visible spectroscopic properties of new 'fluorophilic' fluorine-and perfluoroalkyl-substituted solvatochromic pyridinium N-phenolate betaine dyes
Reichardt, Christian,Eschner, Michael,Schaefer, Gerhard
, p. 737 - 751 (2001)
Syntheses and negative solvatochromism of three new 'fluorophilic' fluorine- and perfluoroalkyl- substituted pyridinium N-phenolate betaine dyes 3-5 are described in order to obtain new zwitterionic dyes which should be less basic and better soluble in perfluorinated solvents than the solvatochromic standard betaine dyes 1 and 2, used to establish an empirical scale of solvent polarity, called the ET (30) or ETN scale. The new betaine dyes 3-5 were designed to allow an extension of the existing ET (30) scale to new solvents. Copyright
