96643-40-2Relevant articles and documents
REACTIONS OF POLYMETHINE DYES. I. SYNTHESIS OF THE PSEUDOBASES OF POLYMETHINE DYES AND THEIR TRANSFORMATIONS
Vompe, A. F.,Ivanova, L. V.,Meskhi, L. M.,Monich, N. V.,Raikhina, R. D.
, p. 529 - 537 (2007/10/02)
Nonsalt-like benzene-soluble pseudobases are formed in the reaction of polymethine dyes with sodium alcoholates.The presence of ionized and un-ionized forms of the pseudobases was established by electronic absorption spectra in aprotic solvents.Solutions of these compounds in alcohols only contain the ionized forms; the unionized form predominates in benzene solutions.The action of various acids on the pseudobases leads to the production of polymethine dyes with the respective anions.