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carbonyl-containing organic material with alkyl C-H, probable ester and/or amide functionality, and possible aromatic or substituted hydrocarbon features

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N. risultato: 20241029161247852232506 Proprietario: publicuser Commenti: 0
  • Translating report into Italiano. English is shown for now.
FTIR ANALYSIS REPORT

FTIR Spectrum Analysis Report

No.: 20241029161247852232506 Date: 2024-10-29 15:17:15 Reported by: FTIR.fun Contact: [email protected]

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Top15

Similarity-ranked Top-15 library comparison

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Top 15 candidates

Reference library candidates

Rank Match % Compound Name Formula / SMILES Library preview Action
Reference candidates load with this Top-15 workbench.

Based on the library matches and evidence above.

Conclusion

carbonyl-containing organic material with alkyl C-H, probable ester and/or amide functionality, and possible aromatic or substituted hydrocarbon features

General assessment
-
#63691 Initial rank 1 Current rank 1 Library lead match 0.0%
Conclusion
  1. Two carbonyl-region bands at 1726 and 1687 cm-1 support a carbonyl-containing organic material and are compatible with ester and/or amide-like environments.
  2. Alkyl C-H stretches at 2857 and 2931 cm-1 support methyl/methylene-containing organic material.
  3. Bands at 1163 and 1241 cm-1 support oxygenated and/or nitrogen-containing single-bond functionality such as C-O or C-N.
Main limitation

The library confidence is effectively absent, with all listed top candidates showing 0.000 similarity, so the top hit cannot be treated as a reliable identification.

Evidence & interpretation
Evidence

Key evidence

Corrispondenza principale della libreria
Poly(vinylpyrrolidone:ethyl methacrylateimethacrylic acid) #63691 | match 0.0%
Miscela
carbonyl-containing organic material with alkyl C-H, probable ester and/or amide functionality, and possible aromatic or substituted hydrocarbon features The ordinary FTIR evidence does not support a firm identification of this sample as the top library hit, even though that entry remains the nearest library label available. The measured spectrum is more safely described as a carbonyl-containing organic material showing alkyl C-H bands, with probable ester and/or amide functionality and possible aromatic or substituted hydrocarbon features. This broader direction is supported by the strong carbonyl region and multiple C-O/C-N-type fingerprint bands, but the overall library match quality is very weak and there is no direct or related literature evidence to confirm a narrower assignment.
Support

Evidence supporting the conclusion

Only sample-relevant statements that support the present conclusion are shown here.

  1. Two carbonyl-region bands at 1726 and 1687 cm-1 support a carbonyl-containing organic material and are compatible with ester and/or amide-like environments.
  2. Alkyl C-H stretches at 2857 and 2931 cm-1 support methyl/methylene-containing organic material.
  3. Bands at 1163 and 1241 cm-1 support oxygenated and/or nitrogen-containing single-bond functionality such as C-O or C-N.
  4. The library shortlist includes several oxygenated carbonyl compounds and polymeric entries, which is broadly consistent with the observed carbonyl-rich spectrum.
  5. The sample shows strong carbonyl-region absorption at 1726 and 1687 cm-1, indicating at least one C=O-containing component and possibly more than one carbonyl environment.
  6. Bands at 2857 and 2931 cm-1 support aliphatic alkyl C-H stretching, while 3023 cm-1 is consistent with an sp2 C-H contribution such as aromatic or unsaturated hydrocarbon character.
  7. Fingerprint absorptions at 1163 and 1241 cm-1 are compatible with C-O and/or C-N stretching, which is chemically consistent with ester, amide, urethane, or related oxygen/nitrogen-containing organic functionality.
  8. The 1461, 1491, and 1518 cm-1 bands are compatible with ring-related or substituted hydrocarbon deformation modes, but they are not sufficient here to prove a specific aromatic polymer or additive.
  9. The broad feature at 3371 cm-1 suggests possible O-H and/or N-H involvement, but by itself it does not establish a specific alcohol, acid, amide, or urethane assignment.
  10. The top-15 library pattern loosely clusters around materials containing methyl groups, carbonyls, oxygenated functionality, and in some cases nitrogen-containing rings, but that pattern is chemically mixed and not specific enough to support the exact top library entry.
Limitations

Evidence that limits the conclusion

  • The library confidence is effectively absent, with all listed top candidates showing 0.000 similarity, so the top hit cannot be treated as a reliable identification.
  • The top-15 candidates are chemically heterogeneous, spanning polymers, salts, small amides/lactams, and other carbonyl compounds, which weakens any narrow compositional conclusion.
  • The library direction 'methyl / chlorine' is not convincingly supported by the measured peak set because no clear identifying C-Cl pattern is established from the present spectrum.
  • It remains uncertain whether the sample is a single material or a mixture containing multiple carbonyl-bearing components.
  • The relative roles of ester, amide, acid, urethane, or lactam functionality cannot be separated confidently from the current evidence alone.
  • Possible aromatic or substituted unsaturated character is suggested but not securely established as a defining feature.
  • The apparent high-wavenumber feature near 3849 cm-1 may reflect weak free O-H, surface moisture behavior, or an artifact; it does not currently sharpen the identification.
Recommendation

Suggested next verification

  • Re-measure the FTIR spectrum with improved signal quality and baseline control, especially in the 1800-1500 and 1300-1000 cm-1 regions, to better distinguish ester versus amide/urethane contributions.
  • Inspect the sample by ATR-FTIR and, if possible, transmission or reflection using a clean replicate to determine whether the 3371 and 3849 cm-1 features are intrinsic or due to moisture/surface effects.
  • Compare the sample specifically against authenticated spectra of ester-containing acrylic materials, amide/lactam-containing polymers, and urethane-containing coatings, since those classes are more consistent with the observed functional groups than a chlorine-led assignment.
  • If the material identity is important, confirm with complementary analysis such as Raman spectroscopy, pyrolysis-GC/MS, or NMR to determine whether the sample is a polymer, coating, or mixed organic formulation.
Peak analysis

Detected peaks and interpretation

★ = Literature-supported peak assignment.

Index Characteristic Wavenumber Absorbance Evidence One-line interpretation Citation Confidence
1 · 1687 1.00 - - - -
2 · 1726 0.84 - - - -
3 · 1461 0.74 - - - -
4 · 2931 0.38 - - - -
5 · 698 0.35 - - - -
6 · 1163 0.33 - - - -
7 · 1241 0.32 - - - -
8 · 761 0.27 - - - -
9 · 1376 0.24 - - - -
10 · 1491 0.24 - - - -
11 · 1518 0.23 - - - -
12 · 2857 0.21 - - - -
13 · 1333 0.21 - - - -
14 · 3371 0.14 - - - -
15 · 3023 0.14 - - - -
16 · 3849 0.11 - - - -
Appendix

Sample information and raw spectrum

Original uploaded spectrum for reference and verification.

Baseline correction method: Asymmetric Least Squares Smoothing

The wavelength range for analysis(cm-1): [(650, 4000)]

Raw spectrum without baseline correction or other processing:

Sample spectrum image
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