I want to ask from researchers especially having knowledge about FTIR spectroscopy that the attached spectra of FTIR represent what type of groups.
please specify the groups.
answers will be appreciated.
First of all it would be really helpful to comment what did you measure at all? or where did you find it?
I'm working on calcium phosphate nanoparticles and the FTIR spectra attached is one of my samples.
Please scale the spectrum from 100% to 70%.
The attached link might help to identify the refexes.
http://cdn.intechopen.com/pdfs/36171.pdf
Every peak in spectra represents certain group of molecule. Currently, it will be difficult to identify the compound because we don't have initial clue of its structure. The peak at 3479 cm-1 can be due to dimeric OH strech, aromatic primary amine or heterocyclic amine (NH) stretch.
Similarly, you can identify other functional groups in data. Please see a very interesting paper in attachment.
Dear Michael
The software run in auto manner and adjust spectrum scale automatically. However, it is necessary to adjust y-axis spectrum scale from 100% to 70%?
The comments above about scaling the spectrum are correct. You can also chop off the spectra below 600cm-1 as this is just detector noise. The baseline appears very flat. How did you examine the sample ? in transmission or ATR ?
The bands in the spectra around 1250- 800 cm-1 look like typical phosphate bands but without the scale expansion mentioned previously this is tenuous but probable based on your starting material.
Thanks to all
I have got required results by correcting the scale as commented previously.
Mr. Munir,
You have a very characteristic IR-spectrum showing bands typical for secondary amide, however a detail deducing is needed to present your data as T % but from 100 %. So, please upload a IR-spectrum in T % from 100-0 %. Or, please upload the original file by the IR spectrometer. Your presentation leads to reducing of the intensity of more bands so that there is unable to confirm my assumption.
I just wondered about Bojidarka's comment about secondary amide. They usually have bands at about 1640 and 1540 cm-1 . I cannot see the latter in this very weak spectrum. Completely agree we need an expanded spectrum to be sure
By the way, there is no amide group in my formulation and i don't require that group
Generalyy, it could be a secondary amide, because of there is a band at 3450 cm-1 (most probably it is only one!?) and a band about 1590 cm-1(Most probably?! But it looks like band).
Bojidarka makes a reasonable comment on the 3450 cm-1 band given the shape and the fact that this is an ATR spectrum. However the 1540 cm-1 band is not seen.
It is possible that the higher band is part of a weak broad h- bonding pattern but with a spectrum this weak we are just speculating on what may or may not be present. I think the phrase "whistling in the dark" is appropriate.
Mr. Dent,
Generally the shown spectrum is with low quality, so there is difficult to assign any resonance effects with the current information available,
- Badges
- Science topic
- Similar topics
- Control Systems Engineering
- Filtering