Reference XPS spectra of amino acids

In this report we present XPS data for five amino acids (AAs) (tryptophan, methionine, glutamine, glutamic acid, and arginine) with different side chain groups measured in solid state (powder form). The theoretically and experimentally obtained chemical structure of AAs are compared. Here, we analys...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2021, Vol.1050 (1), p.12001
Main Authors: Artemenko, A, Shchukarev, A, Štenclová, P, Wågberg, T, Segervald, J, Jia, X, Kromka, A
Format: Article
Language:English
Subjects:
Amino acids
Functional groups
Glutamic acid
Glutamine
Methionine
Solid state
Tryptophan
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Summary:In this report we present XPS data for five amino acids (AAs) (tryptophan, methionine, glutamine, glutamic acid, and arginine) with different side chain groups measured in solid state (powder form). The theoretically and experimentally obtained chemical structure of AAs are compared. Here, we analyse and discuss C 1 s, N 1 s, O 1s and S 2p core level binding energies, FWHMs, atomic concentrations of the functional groups in AAs. The experimentally obtained and theoretically calculated ratio of atomic concentrations are compared. The zwitterionic nature of methionine and glutamine in solid state was determined from protonated amino groups in N 1s peak and deprotonated carboxylic groups in the C 1s spectrum. The obtained XPS results for AAs well correspond with previously reported data.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/1050/1/012001