Aerogels containing 5,10,15,20-tetrakis-(4-sulfonatophenyl)-porphyrin with controlled state of aggregation

Juan Pablo Pino-Pinto, Felipe Oyarzun-Ampuero, Sandra L. Orellana, Mario E. Flores, Hiroyuki Nishide, Ignacio Moreno-Villoslada

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9 Citations (Scopus)

Abstract

Aerogels made of chitosan and chondroitin sulfate, and containing 5,10,15,20-tetrakis-(4-sulfonatophenyl)-porphyrin have been synthesized. The aerogels presented a microstructure made of microfibers and microsheets, with porosity higher than 99%. The dispersion and state of aggregation of the dye in the solids have been controlled with the aid of aromatic polyelectrolytes able to produce aromatic-aromatic interactions. Thus, non-homogenous dispersions of the dye as J-aggregates and formation of microcrystals on the microsheet surface were observed in the absence of the aromatic polymers; on the contrary, well dispersed H-aggregates of the dye were observed in the presence of poly(decylviologen), and well dispersed complexed monomeric dye molecules were found in the presence of a polyketone derivatized with hystamine, thus presenting imidazolium pendant groups. The same state of aggregation has been observed in solution for the respective complexes, highlighting the potential of aromatic-aromatic interactions to achieve a control of the state of aggregation of dyes in solution and further transfer to the solid state keeping their photophysical properties, and furnishing means for a good dispersion of the dyes in solid materials.

Original languageEnglish
Pages (from-to)193-200
Number of pages8
JournalDyes and Pigments
Volume139
DOIs
Publication statusPublished - 2017 Apr 1

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Keywords

  • Aromatic polycations
  • Aromatic-aromatic interactions
  • Dye aggregation
  • Dye in solid materials
  • Porphyrins

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology

Cite this

Pino-Pinto, J. P., Oyarzun-Ampuero, F., Orellana, S. L., Flores, M. E., Nishide, H., & Moreno-Villoslada, I. (2017). Aerogels containing 5,10,15,20-tetrakis-(4-sulfonatophenyl)-porphyrin with controlled state of aggregation. Dyes and Pigments, 139, 193-200. https://doi.org/10.1016/j.dyepig.2016.12.005