In Asphaltene FTIR, if the interpretation was made to have a secondary amide, do I have to see all bonds that corresponds to secondary amides ?
like do I have to see all of these bonds here in the picture, or I might have 2 or 3 of them, and it can be enough to interpret having secondary amides ?
Dear Maen Al-refai
kindly check the link below
https://www.spectroscopyonline.com/view/organic-nitrogen-compounds-vii-amides-rest-story
http://jenalib.leibniz-fli.de/ImgLibDoc/ftir/IMAGE_FTIR.html
Karima Galal Abdel hameed
Thanks for your answer!
but those articles does not answer my question, they describe the behavior and absorbing bands for amides, but I'm asking if all of those bands supposed to exist in my molecule to infer that amide exists ?
Dear Maen Al-refai many thanks for your interesting technical question.
According to the article cited below, secondary amide bands appear at 3239, 1649, 1575 and 1310 cm−1 in the FTIR spectrum of asphaltene:
Detailed FTIR spectroscopy characterization of crude oil extracted asphaltenes: Curve resolve of overlapping bands
Article Detailed FTIR spectroscopy characterization of crude oil ext...
Unfortunately I don't have access to the full text of this article, but the secondary amide bands are listed in the Abstract.
Also in this context please have a look at the following relevant articles entitled
Oil-oil correlation by FTIR spectroscopy of asphaltene samples
Article Oil-oil correlation by FTIR spectroscopy of asphaltene samples
and
Analytical Information on the Asphaltenes from a Few Standard Characterization Techniques
Article Analytical Information on the Asphaltenes from a Few Standar...
These two papers are freely available as public full texts on ResearchGate.
Frank T. Edelmann thanks a lot for your useful answer !
it helped a lot
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