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New Technique Helps Determine the Acidity of Molecules


New Technique Helps Determine the Acidity of Molecules
Written by AZoMApr 29 2021
The chemical behavior of a substance is mainly governed by its degree of acidity or alkalinity. The so-called proton affinity plays a role as a decisive factor and shows how easily an entity emits or attracts a single proton.
 
Using the modified tip of an atomic force microscope, individual atoms in the surface can be probed. Image Credit: TU Wien.
The measurement of the proton affinity of molecules has been relatively easy than it is for surfaces. This is crucial because atoms on surfaces exhibit extremely different proton affinities, based on where they are located. ....

Margareta Wagner , Ulrike Diebold , Bernd Meyer , Interdisciplinary Center , Institute Of Applied Physics , Applied Physics , Friedrich Alexander University Erlangen N , Molecular Materials , பர்நெச் மேயர் , இடைநிலை மையம் , நிறுவனம் ஆஃப் பயன்படுத்தப்பட்டது இயற்பியல் , பயன்படுத்தப்பட்டது இயற்பியல் , மூலக்கூறு பொருட்கள் ,

How acidic are atoms?


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IMAGE: Using the modified tip of an atomic force microscope, individual atoms in the surface can be probed.
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Credit: TU Wien
The degree of acidity or alkalinity of a substance is crucial for its chemical behavior. The decisive factor is the so-called proton affinity, which indicates how easily an entity accepts or releases a single proton. While it is easy to measure this for molecules, it has not been possible for surfaces. This is important because atoms on surfaces have very different proton affinities, depending on where they sit.
Researchers at TU Wien have now succeeded in making this important physical quantity experimentally accessible for the first time: Using a specially modified atomic force microscope, it is possible to study the proton affinity of individual atoms. This should help to analyze catalysts on an atomic scale. The results have been published in the scientific journal ....

Technische Universit , Margareta Wagner , Wiedner Hauptstra , Ulrike Diebold , Bernd Meyer , Angewandte Physik , Institute Of Applied Physics , Applied Physics , Friedrich Alexander University Erlangen N , பர்நெச் மேயர் , நிறுவனம் ஆஃப் பயன்படுத்தப்பட்டது இயற்பியல் , பயன்படுத்தப்பட்டது இயற்பியல் ,