FTIR ANALYSIS REPORT

FTIR Spectrum Analysis Report

No.: 20241216153328924496566 Date: 2024-12-16 07:37:39 Reported by: FTIR.fun Contact: [email protected]

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Top15

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Infrared spectrum comparison chart. Analysis result: oxygenated material with hydroxyl-containing and possible carbonyl-containing functionality.

The library returned POLYESTER as the nearest named match, but the match quality is extremely weak and the broader evidence does not securely support a specific polyester assignment. The observed bands at 3477 and 3623 cm-1 indicate hydroxyl-containing functionality, 1034 cm-1 supports C-O or Si-O type stretching, and 1643 cm-1 is consistent with a weak carbonyl, adsorbed water bending, or unsaturated functionality rather than a clear identifying ester band. Because the Top-15 library pattern is internally mixed and no direct or related literature evidence narrows the interpretation, the most defensible conclusion is a broad oxygenated material direction rather than a firm material identification

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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

oxygenated material with hydroxyl-containing and possible carbonyl-containing functionality

General assessment

#64201 Initial rank 1 Current rank 1 Library lead match 0.0%

Conclusion

Hydroxyl-containing functionality is supported by the bands at 3477 and 3623 cm-1.
An oxygenated matrix is supported by the 1034 cm-1 absorption.
A possible carbonyl-containing contribution remains plausible because of the 1643 cm-1 feature, although it is not specific enough for ester confirmation.

Main limitation

A specific polyester assignment is limited by the absence of a clear, strong ester carbonyl band in the expected higher-carbonyl region.

Evidence

Key evidence

库主匹配

POLYESTER #64201 | match 0.0%

材料方向

oxygenated material with hydroxyl-containing and possible carbonyl-containing functionality The library returned POLYESTER as the nearest named match, but the match quality is extremely weak and the broader evidence does not securely support a specific polyester assignment. The observed bands at 3477 and 3623 cm-1 indicate hydroxyl-containing functionality, 1034 cm-1 supports C-O or Si-O type stretching, and 1643 cm-1 is consistent with a weak carbonyl, adsorbed water bending, or unsaturated functionality rather than a clear identifying ester band. Because the Top-15 library pattern is internally mixed and no direct or related literature evidence narrows the interpretation, the most defensible conclusion is a broad oxygenated material direction rather than a firm material identification.

Support

Evidence supporting the conclusion

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

Hydroxyl-containing functionality is supported by the bands at 3477 and 3623 cm-1.
An oxygenated matrix is supported by the 1034 cm-1 absorption.
A possible carbonyl-containing contribution remains plausible because of the 1643 cm-1 feature, although it is not specific enough for ester confirmation.
The top library name POLYESTER at least points toward an oxygen-rich organic material class, even though the retrieval strength is low.
The only allowed named library result is POLYESTER, but its similarity score is 0.0 and therefore does not provide strong identification support.
The sample shows broad high-wavenumber absorption at 3477 and 3623 cm-1, which is characteristic of free and/or hydrogen-bonded O-H stretching.
The band at 1034 cm-1 is consistent with an oxygen-containing backbone such as C-O stretching; in a different composition it can also overlap with Si-O-related absorption.
The 1643 cm-1 band is not, by itself, a distinguishing ester carbonyl feature and may also reflect water bending or another weak unsaturated/carbonyl contribution.
The Top-15 library set is chemically inconsistent, containing polyester, silicate-like entries, polysulfide-related entries, and other oxygen-rich compounds, so the consensus does not support a narrow single-class conclusion.

Limitations

Evidence that limits the conclusion

A specific polyester assignment is limited by the absence of a clear, strong ester carbonyl band in the expected higher-carbonyl region.
The library result is weak overall, with zero-valued similarity across leading candidates.
The Top-15 candidates do not form a coherent single chemistry pattern and include incompatible classes such as silicate-like and polysulfide materials.
The library consensus phrase suggesting nitrile and sulfur-oxygen functionality is not supported by the observed peak list.
The present peak set is too sparse to distinguish between a hydroxyl-rich organic material, an oxidized polymer, a partially hydrated oxygenated solid, or a mixed material containing inorganic oxygen-based components.
The 1643 cm-1 band remains ambiguous without the full spectral shape and intensity pattern.
No literature-backed reference match is available to confirm whether the sample is truly polyester or only broadly oxygenated.

Recommendation

Suggested next verification

Recollect the FTIR spectrum over the full range with improved signal quality and inspect especially the 1750-1700 cm-1 region for a characteristic ester carbonyl band.
Check the 1300-1000 cm-1 region in more detail to determine whether the 1034 cm-1 band behaves more like organic C-O stretching or inorganic Si-O absorption.
Dry the sample and rerun FTIR to see whether the 3477/3623 and 1643 cm-1 bands decrease, which would test for adsorbed moisture.
If polyester remains a practical possibility, compare against authenticated polyester references and look for the full set of ester-related bands rather than relying on the current weak library hit alone.

Peak analysis

Detected peaks and interpretation

★ = Literature-supported peak assignment.

Index	Characteristic	Wavenumber	Absorbance	Evidence	One-line interpretation	Citation	Confidence
1	·	1034	1.00	-	-	-	-
2	·	3623	0.39	-	-	-	-
3	·	3477	0.34	-	-	-	-
4	·	912	0.29	-	-	-	-
5	·	1643	0.17	-	-	-	-

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:

oxygenated material with hydroxyl-containing and possible carbonyl-containing functionality

FTIR Spectrum Analysis Report

Similarity-ranked Top-15 library comparison

Reference library candidates

oxygenated material with hydroxyl-containing and possible carbonyl-containing functionality

Key evidence

Evidence supporting the conclusion

Evidence that limits the conclusion

Suggested next verification

Detected peaks and interpretation

Sample information and raw spectrum

评论和后续证据

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oxygenated material with hydroxyl-containing and possible carbonyl-containing functionality

Similarity-ranked Top-15 library comparison

Reference library candidates

oxygenated material with hydroxyl-containing and possible carbonyl-containing functionality

Key evidence

Evidence supporting the conclusion

Evidence that limits the conclusion

Suggested next verification

Detected peaks and interpretation

Sample information and raw spectrum

评论和后续证据

此类别中的其他分析

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