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Acid-Base and Aggregation Behavior of Water Soluble N-confused Porphyrin
Journal of Porphyrins and Phthalocyanines (2014)
  • Janet L. Shaw, Kennesaw State University
  • Jonathan McMurry
  • Pooya Salehi
  • Alexander Stovall
The acid-base and aggregation behavior of water soluble meso-tetrakis(p-sulfonato-phenyl)N-confused porphyrin was explored using UV-visible spectroscopy. Stepwise protonation events were observed in acidic media with pK4 = 5.8 and pK3 = 7.7, and spectroscopic evidence suggests the formation of polymeric aggregates at low pH. meso-tetrakis(p-sulfonatophenyl)N-confused porphyrin was found to obey Beer's Law in dimethylformamide and methanol over the concentration range of 10-4 to 10-6 M and at low concentration in water. Deviations in water at higher concentration were analyzed to determine KD values for aggregate formation in the presence and absence of salt and buffer.

  • porphyrin,
  • acid-base properties,
  • aggregation; pKa,
  • spectroscopic investigation,
  • anionic
Publication Date
Citation Information
Janet L. Shaw, Jonathan McMurry, Pooya Salehi and Alexander Stovall. "Acid-Base and Aggregation Behavior of Water Soluble N-confused Porphyrin" Journal of Porphyrins and Phthalocyanines Vol. 18 Iss. 3 (2014) ISSN: 1099-1409
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