What absorbs at 1482 cm⁻¹ in an FTIR spectrum?
A band near 1482 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 1482 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1.0 |
| C c single bond | 3 | 3 | 1.0 |
| Aromatic ring | 2 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Nucleic acid | 1 | 1 | 1.0 |
| Lipid | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Ring structure | 1 | 0 | 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 |
|---|---|---|---|
| TiO2 | 1482, 1700, 1093 | Alkyl C-H | 1 |
| TiO2 nanoparticles | 1482, 1700, 455 | Alkyl C-H | 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 1482 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
-
Alkyl C-H confidence 1.0
“The C-H bending (out of plane) at 925.83 C-H in plane bending (scissoring) at cm-1, cm-1, cm-1 1481.83 C-H stretching (asymmetric) at 2924.09 and stretching ether C-O at 1103.28”
Deswardani 等 - 2017 - Study of Structural and Magnetic Properties of Sil DOI: 10.1088/1757-899X/202/1/012047 -
confidence 1.0
“Explicit assignment: 'carbonated group (CO3) at 1482 cm-1'”
Abu Zeid 等 - 2017 - Chemistry and Bioactivity of NeoMTA Plus (TM) vers DOI: 10.1155/2017/8736428 -
Alkyl C-H confidence 1.0
“LLM confirmed rule peak-group candidate”
Chen 等 - 2023 - Silver nanoparticles deposited on a cotton fabric DOI: 10.1039/d3ra00989k -
confidence 1.0
“156 cm-1 In the spectra of pure TiO 2, the peak observed at 578.5481 is due to the stretching cm-1 vibration of Ti-O, and 1482.0269 shows stretching vibrations of Ti-O-Ti [20].”
Durai 等 - 2021 - INVESTIGATIONS ON STRUCTURAL, OPTICAL, AND IMPEDAN DOI: 10.4314/bcse.v35i1.13 -
C c single bond confidence 1.0
“of and N-H groups is observed between 1587 and 1703 The ring C-C stretching cm-1 cm-1 bands are also observed at 1482 and 1465 in IR (1479 and 1460 in Raman).”
Molecular Structures and Spectral Properties of Natural Indigo and Indirubin: Experimental and DFT Studies DOI: 10.3390/molecules24213831 -
Alkyl C-H confidence 1.0
“The peaks at 1482 cm-1 The crystallinity and purity of the ZCPH-2 were invesand 1540 are assigned to in-plane bending of methyl (-N+(CH tigated using XRD analysis.”
Preparation and characterization of chemically cross-linked zwitterionic copolymer hydrogel for direct dye and toxic trace metal removal from aqueous medium DOI: 10.1007/s11356-023-26966-7 -
C c single bond confidence 1.0
“bending vibrations [17] 1508 (1580-1490) vibration of NH 1482 and 1436 aromatic C-C in ring, (m), stretch secondary amine deformation vibration 1474 and 1416 aromatic C-C in ring 2-(1230-1030) (m), C-N stretch 1171 and 1120 (1230-1030) (m),”
Muresan-Pop 等 - 2011 - Spectroscopic and physical-chemical characterizati DOI: 10.3233/SPE-2011-0519 -
Protein confidence 1.0
“cm-1, The untreated and fixed isolates clustered together along PC2 due to loadings bands at 1630 The untreated and fixed isolates clustered together along PC2 due to loadings bands at 1630 cm-1, cm-1, cm-1, cm-1, cm-1, cm-1 cm-1, 1482 1433”
Influence of the Sample Preparation Method in Discriminating Candida spp. Using ATR-FTIR Spectroscopy DOI: 10.3390/molecules25071551
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