What absorbs at 1592 cm⁻¹ in an FTIR spectrum?
A band near 1592 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Quick answer
A band near 1592 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Aromatic ring | 13 | 12 | 1.0 |
| Amide | 9 | 9 | 1.0 |
| Alkene (C=C) | 7 | 7 | 1.0 |
| Ring structure | 4 | 3 | 1.0 |
| Secondary amine | 3 | 3 | 1.0 |
| N h | 3 | 3 | 1.0 |
| C c single bond | 3 | 3 | 1.0 |
| Carbohydrate | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Lignin | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.
Possible materials
| Material | Supporting peaks | Overlapping groups | Cited sources |
|---|---|---|---|
| polysaccharide | 1592, 1637, 1320 | Amide | 1 |
| plasma | 1592, 1656, 1650 | Amide | 1 |
| lignin | 1592, 1035, 1510 | Aromatic ring | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
Spectrum logic
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1592 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
Literature behind these assignments
-
Hydroxyl (O-H) confidence 1.0
“LLM confirmed rule peak-group candidate”
Reticulated three-dimensional network ablative composites for heat shields in thermal protection systems DOI: 10.1039/c4ra05811a -
Aromatic ring confidence 1.0
“And the strongest abAl2p 74.49 1.92 2.53 2.43 1.91 2.32 cm-1 C]C N1s 399.75 1.78 1.07 1.25 1.61 1.44 sorption peak at 1592 derives from stretching vibration in benzene ring, which is a characteristic absorption peak to aromatic cm-1 hydroca”
Effect of oxidation processing on the surface properties and floatability of Meizhiyou long-flame coal DOI: 10.1016/j.fuel.2017.08.053 -
Amide confidence 1.0
“In an earlier study, we examined cm(cid:1)1, significant peak at area position 1592 between the plasma samples of patients suffering from diarrhea by FTIR peaks of amide I and II, significantly reduced in all of the microscopy and succeeded”
Erahimovitch 等 - 2006 - FTIR spectroscopy examination of leukemia patients DOI: 10.1016/j.vibspec.2005.06.004 -
Aromatic ring confidence 1.0
“It also cm-1 showed aromatic skeletal vibration bands at 1592 3.5 Surface Morphology”
Jacob 等 - 2013 - Green Synthesis for Lignin Plasticization Aqueous DOI: 10.7569/JRM.2012.634107 -
Carbonyl (C=O) confidence 1.0
“cm-1 A strong absorption at 1592 can be attributed to the carbonyl stretching of OCOCH groups 3 10”
Synthesis of Aloevera/Acrylonitrile based Nanoparticles for targeted drug delivery of 5-Aminosalicylic acid DOI: 10.1016/j.ijbiomac.2017.08.085 -
confidence 1.0
“The N-H bending vibrations are also absorbing at 1619 cm-1 and 1592 cm-1.”
Potency of Urea-Treated Halloysite Nanotubes for the Simultaneous Boosting of Mechanical Properties and Crystallization of Epoxidized Natural Rubber Composites DOI: 10.3390/polym13183068 -
Alkene (C=C) confidence 1.0
“cm-1 Results The shift in FT-IR peaks at 1592, 1120 and ABBREVIATIONS cm-1 - peaks of raman spectra observed at 1303, 1300 repreC=C Carbon carbon double bond - sents ordered carbon nanotubes.”
Morphological Modification of Carbon Nanoparticles after Interacting with Methotrexate as a Potential Anticancer Agent DOI: 10.1007/s11095-018-2468-4 -
Amide confidence 1.0
“asymmetric stretching 2931 2929 2932 2929 2916 CH2 2873 2874 2876 2878 2874 CH3 symmetric stretching symmetric stretching 2854 2852 CH2 C=O 1640 1640 1635 1634 1652 stretching (Amide I) C=O 1592 stretching +C-N N-H 1532* 1539 1532 1549 1562”
Organic biopolymers of venus clams: Collagen-related matrix in the bivalve shells with crossed-lamellar ultrastructure DOI: 10.1016/j.bbrep.2021.100939
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