Distinguishing Surface OH and NHx Using TFAA Derivatization and XPS

Autor:	Andreas Holländer, Marjorie Dubreuil, Falko Pippig, Dirk Vangeneugden
Přispěvatelé:	Publica
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Measurement method Polymers and Plastics Polymer Surface reaction Condensed Matter Physics Medicinal chemistry chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Nucleophile Functional group Organic chemistry Derivatization
Zdroj:	Plasma Processes and Polymers. 5:345-349
ISSN:	1612-8869 1612-8850
DOI:	10.1002/ppap.200700167
Popis:	TFAA has been used widely for the derivatization of hydroxyl groups in XPS of organic polymers. Unfortunately, in the presence of other nucleophilic groups at the surface like amino groups, these also react with TFAA and a quantification of the different functional group concentrations is impossible. It has been found that the TFAA derivatives of hydroxyl groups and amines, namely the trifluoroacetate and the trifluoroamide, respectively, can be distinguished by the BE of the CF 3 component in the C1s spectrum. While in a trifluoroacetamide the BE is about 292.3 eV, in a trifluoroacetate it can be as high as 294.2 eV in the case of densely packed hydroxyl groups.
Databáze:	OpenAIRE
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