Volume 49, Issue 38 p. 6885-6888

Communication

A Unified pH Scale for All Phases^†

Dr. Daniel Himmel,

Dr. Daniel Himmel

Institute for Inorganic and Analytical Chemistry and Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg (Germany)

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Dipl.-Chem. Sascha K. Goll,

Dipl.-Chem. Sascha K. Goll

Institute for Inorganic and Analytical Chemistry and Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg (Germany)

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Prof. Dr. Ivo Leito,

Prof. Dr. Ivo Leito

Institute of Chemistry, University of Tartu, 14a Ravila Street, 50411 Tartu (Estonia)

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Prof. Dr. Ingo Krossing,

Prof. Dr. Ingo Krossing

[email protected]

Institute for Inorganic and Analytical Chemistry and Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg (Germany)

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Dr. Daniel Himmel,

Dr. Daniel Himmel

Institute for Inorganic and Analytical Chemistry and Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg (Germany)

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Dipl.-Chem. Sascha K. Goll,

Dipl.-Chem. Sascha K. Goll

Institute for Inorganic and Analytical Chemistry and Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg (Germany)

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Prof. Dr. Ivo Leito,

Prof. Dr. Ivo Leito

Institute of Chemistry, University of Tartu, 14a Ravila Street, 50411 Tartu (Estonia)

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Prof. Dr. Ingo Krossing,

Prof. Dr. Ingo Krossing

[email protected]

Institute for Inorganic and Analytical Chemistry and Freiburger Materialforschungszentrum (FMF), Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104 Freiburg (Germany)

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First published: 16 August 2010

https://doi.org/10.1002/anie.201000252

Citations: 141

^†

The work of D.H., S.K.G., and I.K. was supported by the Deutsche Forschungsgemeinschaft, the Freiburger Materialforschungszentrum (FMF), the Albert-Ludwigs-Universität Freiburg, and the Fonds der Chemischen Industrie. We thank Dipl.-Chem. Philipp Eiden for help with the computer programming. The work of I.L. was supported by the Estonian Science foundation (grant 7374).

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Graphical Abstract

One for all! On the basis of the absolute chemical potential of the proton, a unified absolute pH scale is introduced that is universally applicable in the gas phase, in solution, and in the solid state. With this scale, it is possible to directly compare acidities in different media, and to give a thermodynamically meaningful definition of superacidity. This scale can be used in all areas with variable proton activity.

Supporting Information

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Volume49, Issue38

September 10, 2010

Pages 6885-6888

A Unified pH Scale for All Phases^†

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A Unified pH Scale for All Phases^†