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silicon- and oxygen-containing cyclic material

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Ergebnis Nr.: 20250507211725943448384 Besitzer: publicuser Kommentare: 1
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FTIR ANALYSIS REPORT

FTIR Spectrum Analysis Report

No.: 20250507211725943448384 Date: 2025-05-08 03:09:42 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

silicon- and oxygen-containing cyclic material

General assessment
-
#26062 Initial rank 1 Current rank 1 Library lead match 0.0%
Conclusion
  1. Observed bands at 1067 and 1119 cm-1 support strong oxygen-linked fingerprint absorption consistent with Si-O and/or C-O bonding.
  2. The 1253 cm-1 band supports an oxygenated, substituted framework and is compatible with silicon-containing organic materials.
  3. Bands at 688 and 725 cm-1 support the presence of a structured low-frequency fingerprint pattern consistent with silicon-containing cyclic or ring-associated chemistry.
Main limitation

All reported top library similarities are 0.000, so the named hit should not be treated as a reliable identification.

Evidence & interpretation
Evidence

Key evidence

Bibliotheks-Haupttreffer
1-methylpyrrolidin-2-one #26062 | match 0.0%
Materialrichtung
silicon- and oxygen-containing cyclic material The ordinary FTIR search does not support a firm compound-level identification for this sample. Although the nearest library name is 1-methylpyrrolidin-2-one, all listed library similarities are effectively zero and the broader Top-15 pattern is inconsistent with a single well-matched molecule. The observed spectrum is better treated as indicating a silicon- and oxygen-containing cyclic material, supported mainly by strong fingerprint-region absorption at 1067, 1119, and 1253 cm-1 together with low-wavenumber bands at 688 and 725 cm-1. However, the clear carbonyl-region bands at 1727 and 1735 cm-1 are not well reconciled by that direction alone, so the result should remain a broadened material assignment rather than an entity claim.
Support

Evidence supporting the conclusion

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

  1. The ordinary FTIR search does not support a firm compound-level identification for this sample. Although the nearest library name is 1-methylpyrrolidin-2-one, all listed library similarities are effectively zero and the broader Top-15 pattern is inconsistent with a single well-matched molecule. The observed spectrum is better treated as indicating a silicon- and oxygen-containing cyclic material, supported mainly by strong fingerprint-region absorption at 1067, 1119, and 1253 cm-1 together with low-wavenumber bands at 688 and 725 cm-1. However, the clear carbonyl-region bands at 1727 and 1735 cm-1 are not well reconciled by that direction alone, so the result should remain a broadened material assignment rather than an entity claim.
  2. Observed bands at 1067 and 1119 cm-1 support strong oxygen-linked fingerprint absorption consistent with Si-O and/or C-O bonding.
  3. The 1253 cm-1 band supports an oxygenated, substituted framework and is compatible with silicon-containing organic materials.
  4. Bands at 688 and 725 cm-1 support the presence of a structured low-frequency fingerprint pattern consistent with silicon-containing cyclic or ring-associated chemistry.
  5. The library packet's common pattern explicitly points toward silicon / oxygen heterocycle chemistry rather than a well-supported single small molecule.
  6. The strongest practical evidence comes from the sample bands at 1067, 1119, and 1253 cm-1, which are consistent with prominent Si-O/C-O-type fingerprint absorption in an oxygen-containing framework.
  7. Bands at 688 and 725 cm-1 are also compatible with a heavier-atom substituted ring or silicon-containing fingerprint pattern, which aligns with the broad library consensus toward silicon / oxygen heterocycle chemistry.
  8. The Top-15 library set does not converge on one coherent named substance; instead it contains mixed carbonyl-containing compounds and repeated weak hits, indicating that the search match is not specific.
  9. The sample also shows a distinct doublet-like carbonyl region at 1727 and 1735 cm-1, indicating one or more C=O-containing components or environments that are not securely explained by the broadened silicon / oxygen cyclic direction alone.
Limitations

Evidence that limits the conclusion

  • All reported top library similarities are 0.000, so the named hit should not be treated as a reliable identification.
  • The Top-15 candidates are chemically diverse, including diketones, aldehydes, amides, nitriles, esters, and sulfur-containing carbonyls, which weakens any narrow assignment.
  • The strong carbonyl-region bands at 1727 and 1735 cm-1 are not specifically accounted for by the broadened silicon / oxygen cyclic direction.
  • It remains uncertain whether the sample is a single silicon-oxygen cyclic substance, a carbonyl-containing silicon-organic material, or a mixture.
  • The carbonyl doublet near 1727-1735 cm-1 could reflect multiple carbonyl environments, overlapping components, or an additional non-silicon constituent.
  • Because the reference library comparison is weak and unsupported by direct literature matching, the current conclusion should remain at a broadened material-direction level.
Recommendation

Suggested next verification

  • Verify the carbonyl assignment by rechecking the 1800-1650 cm-1 region at higher signal quality to determine whether the 1727 and 1735 cm-1 features are both real and distinct.
  • Inspect the 1200-1000 cm-1 region in more detail, as relative intensity and band shape there can help distinguish Si-O-Si-rich materials from ordinary C-O-containing organics.
  • If available, run complementary GC-MS or LC-MS for low-molecular-weight components, since the spectrum may include a carbonyl-bearing contaminant or mixture component.
  • Acquire a repeat FTIR spectrum from a fresh preparation or a cleaned substrate/background subtraction to confirm whether the silicon-oxygen fingerprint and the carbonyl bands arise from the same material.
Peak analysis

Detected peaks and interpretation

★ = Literature-supported peak assignment.

Index Characteristic Wavenumber Absorbance Evidence One-line interpretation Citation Confidence
1 · 1735 1.00 - - - -
2 · 1534 0.70 - - - -
3 · 1290 0.50 - - - -
4 · 1727 0.50 - - - -
5 · 1348 0.31 - - - -
6 · 1067 0.20 - - - -
7 · 1253 0.20 - - - -
8 · 1119 0.18 - - - -
9 · 725 0.17 - - - -
10 · 1431 0.15 - - - -
11 · 688 0.10 - - - -
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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  • 8 Mai '25

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