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oxygenated polymer with hydroxyl and carbonyl functionality, possibly containing aromatic or heteroatom-substituted vinyl polymer features

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結果編號: 20250505153349298376737 擁有者: Kamila 評論: 0
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FTIR ANALYSIS REPORT

FTIR Spectrum Analysis Report

No.: 20250505153349298376737 Date: 2025-05-06 03:19:15 Reported by: FTIR.fun Contact: [email protected]

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Top15

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Top 15 candidates

Reference library candidates

Rank Match % Compound Name Formula / SMILES Library preview Action
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Based on the library matches and evidence above.

Conclusion

oxygenated polymer with hydroxyl and carbonyl functionality, possibly containing aromatic or heteroatom-substituted vinyl polymer features

General assessment
-
#33937 Initial rank 1 Current rank 1 Library lead match 0.0%
Conclusion
  1. Observed bands at 3408 and 1728 cm-1 support hydroxyl and carbonyl functionality in the sample.
  2. Bands at 1285, 1095, and 1004 cm-1 support C-O-containing polymer chemistry.
  3. The library candidate set contains several oxygen-rich polymer references, which aligns better with the observed spectrum than a purely hydrocarbon material would.
Main limitation

The leading library hit has zero reported similarity and low confidence, so it is not strong positive evidence for a specific entity assignment.

Evidence & interpretation
Evidence

Key evidence

資料庫主要匹配
Poly(vinylbenzylammonium chloride) #33937 | match 0.0%
材料方向
oxygenated polymer with hydroxyl and carbonyl functionality, possibly containing aromatic or heteroatom-substituted vinyl polymer features The current FTIR evidence does not securely identify the sample as Poly(vinylbenzylammonium chloride), because the library match is low-confidence and no direct or related literature source independently supports that assignment. The observed spectrum is more defensibly described as an oxygenated polymeric material showing a broad O-H band, an ester or acid-like carbonyl band, aliphatic C-H stretching, and multiple fingerprint-region bands consistent with C-O-containing polymer structures. A narrower assignment to a specific ammonium-containing polymer is not chemically secure from the present evidence alone.
Support

Evidence supporting the conclusion

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

  1. The current FTIR evidence does not securely identify the sample as Poly(vinylbenzylammonium chloride), because the library match is low-confidence and no direct or related literature source independently supports that assignment. The observed spectrum is more defensibly described as an oxygenated polymeric material showing a broad O-H band, an ester or acid-like carbonyl band, aliphatic C-H stretching, and multiple fingerprint-region bands consistent with C-O-containing polymer structures. A narrower assignment to a specific ammonium-containing polymer is not chemically secure from the present evidence alone.
  2. Observed bands at 3408 and 1728 cm-1 support hydroxyl and carbonyl functionality in the sample.
  3. Bands at 1285, 1095, and 1004 cm-1 support C-O-containing polymer chemistry.
  4. The library candidate set contains several oxygen-rich polymer references, which aligns better with the observed spectrum than a purely hydrocarbon material would.
  5. Bands below 900 cm-1 could be compatible with aromatic substitution or other fingerprint-region structural detail, so aromatic or substituted vinyl polymer character remains plausible.
  6. The sample shows a broad band near 3408 cm-1 consistent with hydroxyl-containing material or absorbed water.
  7. A strong band at 1728 cm-1 supports a carbonyl-containing functionality such as ester, carboxylic acid, or related oxygenated polymer motif.
  8. Bands near 1285, 1095, and 1004 cm-1 are consistent with C-O stretching contributions often seen in oxygenated polymers.
  9. The 2926 cm-1 band supports aliphatic C-H stretching.
  10. Fingerprint-region bands at 739, 791, 870, and 940 cm-1 may reflect substitution pattern, out-of-plane bending, or backbone-related modes, but they are not sufficient here for a secure specific polymer identification.
  11. The Top-15 library pattern is chemically mixed but repeatedly includes oxygenated polymers such as poly(acrylic acid), poly(vinyl alcohol), poly(vinyl butyral), and maleic-acid or anhydride-containing copolymers, which is broadly consistent with the observed O-H, C=O, and C-O features.
Limitations

Evidence that limits the conclusion

  • The leading library hit has zero reported similarity and low confidence, so it is not strong positive evidence for a specific entity assignment.
  • The spectrum does not show clear identifying evidence here for a quaternary ammonium-containing aromatic polymer specifically; the provided peak set is more strongly dominated by generic O-H, C=O, and C-O features.
  • The Top-15 library list is internally heterogeneous, including poly(acrylic acid), poly(vinyl alcohol), poly(vinyl butyral), maleic copolymers, and polychloroprene, which limits confidence in any narrow material call.
  • The carbonyl band at 1728 cm-1 does not by itself distinguish ester from carboxylic acid or related oxygenated polymer environments.
  • The broad 3408 cm-1 feature may arise from intrinsic hydroxyl groups, water uptake, or both.
  • The current evidence does not cleanly establish whether aromatic, ammonium, sulfonyl, or anhydride-specific functionality is truly present.
  • A specific polymer identity remains uncertain because the retrieval quality is weak and the literature evidence is absent.
Recommendation

Suggested next verification

  • Recollect the FTIR spectrum with improved signal quality and baseline control, ideally including the full 4000-400 cm-1 range and relative band intensities.
  • Check specifically for confirming bands that would separate carboxylic acid, ester, anhydride, and alcohol-rich polymers, especially in the 1800-1500 and 1300-900 cm-1 regions.
  • If Poly(vinylbenzylammonium chloride) remains of interest, look for independent evidence of aromatic ring modes and ammonium-associated features using a higher-quality spectrum and comparison to an authenticated reference.
  • Complement FTIR with Raman, elemental analysis, or XPS to test for nitrogen and possible counterion content; this would help confirm or reject an ammonium-containing polymer assignment.
Peak analysis

Detected peaks and interpretation

★ = Literature-supported peak assignment.

Index Characteristic Wavenumber Absorbance Evidence One-line interpretation Citation Confidence
1 · 870 0.97 - - - -
2 · 940 0.79 - - - -
3 · 791 0.79 - - - -
4 · 1407 0.79 - - - -
5 · 739 0.78 - - - -
6 · 1004 0.74 - - - -
7 · 1095 0.64 - - - -
8 · 1285 0.35 - - - -
9 · 3408 0.26 - - - -
10 · 2926 0.24 - - - -
11 · 1728 0.20 - - - -
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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