Basic Remarks on Acidity

Daniel Himmel; Valentin Radtke; Burkhard Butschke; Ingo Krossing

doi:10.1002/anie.201709057

Basic Remarks on Acidity

Angew Chem Int Ed Engl. 2018 Apr 9;57(16):4386-4411. doi: 10.1002/anie.201709057. Epub 2018 Mar 15.

Authors

Daniel Himmel¹, Valentin Radtke¹, Burkhard Butschke¹, Ingo Krossing¹

Affiliation

¹ Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany.

PMID: 29171707
DOI: 10.1002/anie.201709057

Abstract

This Review provides a unified view on Brønsted acidity. For this purpose, a brief overview of the concepts acidity, acid strengths, and pH value is given, including problems, proposed solutions, and the use of the pH_abs /pHabsH2O scale as a unifying concept. Thereafter, some examples of the accessibility and application of unified pH_abs values are given. The Review is rounded off with the analogy of acid-base chemistry to redox chemistry with the introduction of the unified redox scale pe_abs . The combination of pH_abs and pe_abs values in the protoelectric potential map (PPM), as elaborated in ongoing studies on the thermochemistry of single ions, provides a means to classify and to compare all possible acid-base/redox reactions in a medium-independent and, thus, unified fashion.

Keywords: Brønsted acidity; chemical potential; pH value; pe value; reducity.

Publication types

Review
Research Support, Non-U.S. Gov't