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

• Published in: Chemical communications (Cambridge, England) Vol. 49; no. 61; pp. 6870 - 6872
• Main Authors: Shundo, Atsuomi, Ishihara, Shinsuke, Labuta, Jan, Onuma, Yosuke, Sakai, Hideki, Abe, Masahiko, Ariga, Katsuhiko, Hill, Jonathan P
• Format: Journal Article
• Language: English
• Published: England 01.01.2013
• Subjects: Acid-Base Equilibrium; Colorimetry; Dichloromethane; Indicators; Methylene Chloride - chemistry; Molecular Structure; Protonation; Solvents; Solvents - chemistry; Visualization

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 proto...