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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Spectroscopic Characterization on the Aggregation Behavior of Pyronin G with Tetraphenylborate anion

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1995, v.8 no.1, pp.47-53
Lee, Beom-Gyu
Kim, Kang-Jin
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Abstract

The aggregation of Pyronin G(<TEX>$PG^+$</TEX>) with tetraphenylborate(<TEX>$TPB^-$</TEX>) anion has been investigated in aqueous solution by absorption and fluorescence spectrophotometries. The addition of 1,4-dioxane in aqueous solution of <TEX>$PG^+$</TEX> and <TEX>$TPB^-$</TEX> dissociates the aggregates of PG-TPB due to the increased hydrophobicity of the mixed solvent as compared to pure water, and yields higher <TEX>$PG^+$</TEX> momomer concentration than aqueous <TEX>$PG^+$</TEX> solution. The aggregation is not observed in any organic solvents except in water. The absorption maxima of <TEX>$PG^+$</TEX> are correlated relatively well with <TEX>${\pi}^*$</TEX> scale and <TEX>$(n^2-1)/(2n^2+1)$</TEX> funtion. But better linear relationship was obtained with <TEX>${\pi}^*$</TEX> scale for alcohols.

keywords
Pyronin G, Sodium Tetraphenylborate, Dye Aggregation


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