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Electronic Absorption Spectra of Copper(Ⅱ) Sulphophthalocyanine and Aggregation of the Dye in Aqueous Solution
Aggregation behavior of C.I.Direct Blue 86 was discussed using analyses of its UV-Vis spectra.The experiment results show that the dye molecules are inclined to aggregate in aqueous solution.Even in a very dilute solution of 0.050μmol/L,A618/A659 =1.2398,showing that the dye monomers still coexist with its dimers.The strong aggregation trend may cause dye precipitates at a higher concentration,which is an important factor that should be considered in producing a formula of ink-jet inks containing the dye as a colorant.
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Journal of Donghua University(English Edition)
2007年05期
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