(<i>E</i>)-2,6-Dibromo-4-{2-[1-(1<i>H</i>,1<i>H</i>,2<i>H</i>,2<i>H</i>-perfluorooctyl)pyridinium-4-yl]ethenyl}phenolate methanol disolvate, a fluoroponytailed solvatochromic dye
Acta crystallographica. Section E, Crystallographic communications