
%0 Journal Article
%A Gruen, LC 
%A Blagrove, RJ 
%T The aggregation and reaction with oxygen of the tetrasodium salt of cobalt phthalocyanine-4,4',4'',4'''-tetrasulphonic acid
%J Australian Journal of Chemistry
%D 1973/02/01
%V 26
%N 2
%P 319-323
%K 
%R https://doi.org/10.1071/CH9730319
%U https://www.publish.csiro.au/paper/CH9730319 
%X The reversible addition of molecular oxygen to the tetrasodium salt of cobalt phthalocyanine-4,4?,4?,4??-tetrasulphonic acid in aqueous solution has been confirmed. Visible absorption spectra of the monomeric and dimeric species and of the oxygen adduct have been determined. A monomer-dimer system prevails at neutral pH, low ionic strength, and low dye concentrations. The oxygen adduct and the dimeric form of the dye predominate in alkaline solution. 
