What absorbs at 1354 cm⁻¹ in an FTIR spectrum?
A band near 1354 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 1354 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 | 5 | 5 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| S eq o | 1 | 1 | 1.0 |
| Silicon carbon | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Oxalate | 1 | 1 | 0.9 |
| Carbonate | 1 | 1 | 0.6 |
| Aromatic ring | 1 | 0 | 1.0 |
Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.
Possible materials
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 1354 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
-
Ring structure confidence 1.0
“1381 (0.19) 1362 1378 (0.09) HC g CC asymmetric ring stretch 1354 1345 (0.38)”
Hydrogen Bonding in Human Manganese Superoxide Dismutase Containing 3-Fluorotyrosine DOI: 10.1529/biophysj.105.060616 -
Alkyl C-H confidence 1.0
“The weak absorption band at 1354 is assigned to CH scissor vibration in Si-CH 2SiMe”
Comparative study of bulk and surface compositions of plasma polymerized organosilicon thin films DOI: 10.1002/ppap.201900024. -
S eq o confidence 1.0
“cm-1 cm-1, C in the ICP nanocomposites, and two bands at 1354 and 1163 which correspond to S=O the stretching in AB 25, are completely absent after adsorption.”
Polyaspartate-Ionene/Na+-Montmorillonite Nanocomposites as Novel Adsorbent for Anionic Dye; Effect of Ionene Structure DOI: 10.3390/polym12122843 -
Alkyl C-H confidence 1.0
“Characteristics peaks were at 1390 (C-H bending), 1354 cm-1”
Swelling Behavior of Polyacrylamide–Cellulose Nanocrystal Hydrogels: Swelling Kinetics, Temperature, and pH Effects DOI: 10.3390/ma12132080 -
Alkyl C-H confidence 1.0
“The cm-1 peak at 1605 can be attributed to the aromatic skeletal and C=O stretch vibrations cm-1 characteristic of lignin, and the peak at 1354 can be assigned to -CH bending [35,38].”
Removal of Methylene Blue from Aqueous Solutions Using a New Natural Lignocellulosic Adsorbent—Raspberry (Rubus idaeus) Leaves Powder DOI: 10.3390/polym14101966 -
C c single bond confidence 1.0
“1242 C-C stretching (benzenoid) 1354, 1323 1350, 1332 C-H Licence.”
Development of a near infrared novel bioimaging agent via co-oligomerization of Congo red with aniline and o-phenylenediamine: experimental and theoretical studies DOI: 10.1039/c9ra05814a -
C c single bond confidence 1.0
“1,417 C-C,C-H,andN-Hvibrationsoftryptophan 1354 Indolevibrationoftryptophan”
A Plasma Biochemical Analysis of Acute Lead Poisoning in a Rat Model by Chemometrics-Based Fourier Transform Infrared Spectroscopy: An Exploratory Study DOI: 10.3389/fchem.2018.00261 -
Carboxyl (COOH) confidence 1.0
“The two bands at 1520 and 1354 cm-1 can be ascribed to the vC=O of the active species *COO- [54], which is the key intermediate of CO2 reduction.”
Wei 等 - 2023 - Photoelectrocatalytic reduction of CO2 catalyzed b DOI: 10.1016/S1872-2067(23)64395-5
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