Colorimetric visualization of acid–base equilibria in non-polar solvent

Atsuomi Shundo, Shinsuke Ishihara, Jan Labuta, Yosuke Onuma, Hideki Sakai, Masahiko Abe, Katsuhiko Ariga, Jonathan P. Hill

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Visualization of an acid–base equilibrium in a non-polar solvent (dichloromethane), which may be extended to other solvents, is reported. It is based on an oxoporphyrinogen as a multichromic indicator of prevailing acidity in solution and presents up to six distinct hues depending on degree of protonation, tautomeric state or presence of a basic guest.

Original languageEnglish
Pages (from-to)6870-6872
Number of pages3
JournalChemical Communications
Issue number61
Publication statusPublished - Jul 4 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • General Chemistry
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry


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