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nitrogen-containing aromatic small molecule, possibly a substituted heteroaromatic ring compound

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Resultaat nr.: 20250529163547581174646 Eigenaar: publicuser Reacties: 0
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FTIR ANALYSIS REPORT

FTIR Spectrum Analysis Report

No.: 20250529163547581174646 Date: 2025-05-29 15:37:52 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

nitrogen-containing aromatic small molecule, possibly a substituted heteroaromatic ring compound

General assessment
-
#67954 Initial rank 1 Current rank 1 Library lead match 0.0%
Conclusion
  1. The leading library candidate name, 4-Nitropyridine, points toward an aromatic nitrogen-containing ring system.
  2. Several Top-15 candidates share aromatic frameworks and heteroatom substitution, supporting a broad direction of substituted aromatic/heteroaromatic chemistry.
  3. Bands at 749, 799, and 873 cm-1 are consistent with substituted aromatic ring behavior.
Main limitation

All listed library candidates have 0.000 similarity, so the retrieval does not provide reliable compound-level discrimination.

Evidence & interpretation
Evidence

Key evidence

Bibliotheek hoofdmatch
4-Nitropyridine #67954 | match 0.0%
Materiaalrichting
nitrogen-containing aromatic small molecule, possibly a substituted heteroaromatic ring compound The current FTIR search does not support a firm compound-level identification. Although the nearest library name is 4-Nitropyridine, all reported library similarities are 0.000 and no direct reference or related-literature evidence independently supports that assignment. The observed spectrum is sparse, with notable bands near 1571 cm-1, out-of-plane aromatic-region bands at 749, 799, and 873 cm-1, and a series of features in the 1892-2168 cm-1 region that are not sufficient on their own to establish a specific structure. Taken together, the most defensible conclusion is a broad material direction: a nitrogen-containing aromatic small molecule, possibly a substituted heteroaromatic ring compound, rather than a confirmed match to 4-Nitropyridine.
Support

Evidence supporting the conclusion

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

  1. The current FTIR search does not support a firm compound-level identification. Although the nearest library name is 4-Nitropyridine, all reported library similarities are 0.000 and no direct reference or related-literature evidence independently supports that assignment. The observed spectrum is sparse, with notable bands near 1571 cm-1, out-of-plane aromatic-region bands at 749, 799, and 873 cm-1, and a series of features in the 1892-2168 cm-1 region that are not sufficient on their own to establish a specific structure. Taken together, the most defensible conclusion is a broad material direction: a nitrogen-containing aromatic small molecule, possibly a substituted heteroaromatic ring compound, rather than a confirmed match to 4-Nitropyridine.
  2. The leading library candidate name, 4-Nitropyridine, points toward an aromatic nitrogen-containing ring system.
  3. Several Top-15 candidates share aromatic frameworks and heteroatom substitution, supporting a broad direction of substituted aromatic/heteroaromatic chemistry.
  4. Bands at 749, 799, and 873 cm-1 are consistent with substituted aromatic ring behavior.
  5. The 1571 cm-1 band is compatible with conjugated aromatic or heteroaromatic skeletal vibration.
  6. The library top hit is 4-Nitropyridine, but the reported match strength is effectively absent, so the hit can only be treated as a weak directional clue.
  7. The Top-15 library pattern is chemically mixed but repeatedly includes small aromatic or heteroaromatic molecules containing nitrogen and/or oxygen functionality.
  8. The sample shows bands at 749, 799, and 873 cm-1, which are consistent with aromatic C-H out-of-plane bending in a substituted ring region.
  9. The band at 1571 cm-1 is compatible with an aromatic ring vibration or a conjugated nitrogen-containing ring environment, but it is not by itself identifying.
  10. No clear confirming evidence for a specific nitro, carboxylic acid, amine polymer, or strongly hydroxylated aromatic candidate is provided by the present packet.
  11. No direct literature statement or closely related reference spectrum was recovered to narrow the assignment further.
Limitations

Evidence that limits the conclusion

  • All listed library candidates have 0.000 similarity, so the retrieval does not provide reliable compound-level discrimination.
  • The Top-15 candidate set is chemically diverse, including nitro heteroaromatics, carboxylic acids, phenolics, and poly(ethylenimine), which weakens any narrow assignment.
  • No supporting groups are explicitly confirmed for the top candidate.
  • The present evidence does not establish whether the nitrogen functionality is nitro, ring nitrogen, amine, or another form.
  • The features between about 1892 and 2168 cm-1 are not interpreted here strongly enough to assign a specific functional group.
  • The absence of corroborating literature or reference matching leaves the exact substitution pattern and molecular identity open.
Recommendation

Suggested next verification

  • Re-acquire the FTIR spectrum with improved signal quality and full baseline correction, especially to verify the weak or unusual features in the 1892-2168 cm-1 region.
  • Check specifically for the characteristic paired nitro stretching region expected near the mid-1500 and mid-1300 cm-1 ranges if 4-Nitropyridine remains under consideration.
  • Obtain complementary Raman or mass spectrometry data to determine whether the sample is a small substituted heteroaromatic molecule rather than a polymeric or highly oxygenated aromatic material.
  • If enough sample is available, compare directly against an authentic reference spectrum for 4-Nitropyridine under the same measurement conditions.
Peak analysis

Detected peaks and interpretation

★ = Literature-supported peak assignment.

Index Characteristic Wavenumber Absorbance Evidence One-line interpretation Citation Confidence
1 · 1166 1.00 - - - -
2 · 749 1.00 - - - -
3 · 799 0.87 - - - -
4 · 873 0.81 - - - -
5 · 1571 0.69 - - - -
6 · 3017 0.50 - - - -
7 · 2323 0.47 - - - -
8 · 2112 0.31 - - - -
9 · 2050 0.25 - - - -
10 · 2168 0.25 - - - -
11 · 1892 0.23 - - - -
12 · 1980 0.20 - - - -
13 · 2019 0.14 - - - -
14 · 2011 0.14 - - - -
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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