What absorbs at 1441 cm⁻¹ in an FTIR spectrum?
A band near 1441 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 1441 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 |
|---|---|---|---|
| Carbonate | 3 | 3 | 0.9 |
| C-O single bond | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Amide | 2 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 0.9 |
| Nitrogen heterocycle | 1 | 0 | 0.9 |
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 |
|---|---|---|---|
| gelatin | 1441, 1652, 3300 | Alkyl C-H, C-O single bond | 1 |
| Silver nanoparticles | 1441, 1636, 1631 | Alkyl C-H, C-O single bond | 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 1441 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 peak at 1545 cm(cid:1)1 C@C attributed to ring stretching alkene, peak at 1441 CAH assigned to the bend of CH 2/CH arene-ethylbenzene, the 3”
Green synthesis of Silver nanoparticles using Streptomyces hirsutus strain SNPGA-8 and their characterization, antimicrobial activity, and anticancer activity against human lung carcinoma cell line A549 DOI: 10.1016/j.sjbs.2021.08.084 -
Aromatic ring confidence 1.0
“1732 C = O, C = C, H-O-H 1630 1638 1623 1628 1630 1637 Aromatic C=C ring stretching 1441 1446 1449 1438 -”
Characterization and Thermal Behavior Study of Biomass from Invasive Acacia mangium Species in Brunei Preceding Thermochemical Conversion DOI: 10.3390/su13095249 -
C-O single bond confidence 1.0
“The tertiary alcohol (C-OH) group contributes with a peak at 1441 cm-1.”
Improved Photocatalytic and Antioxidant Activity of Olive Fruit Extract-Mediated ZnO Nanoparticles DOI: 10.3390/antiox12061201 -
Hydroxyl (O-H) confidence 1.0
“0.6 3523cm-1 3000 , O-H deformation vibrastretching vibration at 1441cm-1 1181cm-1 tion at”
Li 和 Yang - 2014 - Fabrication and Characterization of Electrospun Wo DOI: 10.1155/2014/163678 -
Amide confidence 1.0
“appearance of three peaks at 1651 (amide I), 1448 and 1441 cm-1 (amide II);”
Argon and Argon–Oxygen Plasma Surface Modification of Gelatin Nanofibers for Tissue Engineering Applications DOI: 10.3390/membranes11010031 -
confidence 1.0
“2 spectrum revealed the presence of cm-1 the band at 797 could be identified as Si-O-Si characteristics PU bands, N-H stretching vibration at 1441 In vitro bioactivity of Polyurethane/85S Bioglass composite scaffolds 100”
Radev 等 - 2013 - In vitro bioactivity of Polyurethane85S Bioglass DOI: 10.2478/s11532-013-0273-9 -
Alkyl C-H confidence 1.0
“Nevertheless, a prominent band observed around 1441 can be assigned to the CH2 deformation vibration H+ [33], which appeared only at lower pH values due to a sufficient supply of ions to initiate the interaction between the precursors used”
pH-induced wurtzite-zinc blende heterogeneous phase formation, optical properties tuning and thermal stability improvement of green synthesized CdS nanoparticles DOI: 10.1016/j.heliyon.2023.e15908 -
confidence 1.0
“The same scenario occurred at the intensified and shifted bands of 1627 and 1441 cm-1, which indicates the (mg/g) symmetric C-O bond in carboxylate [62-64] in A.”
Potential Application of Innovative Aspergillus terreus/ Sodium Alginate Composite Beads as Eco-Friendly and Sustainable Adsorbents for Alizarin Red S Dye: Isotherms and Kinetics Models DOI: 10.3390/microorganisms11051135
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