What absorbs at 1429 cm⁻¹ in an FTIR spectrum?
A band near 1429 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 1429 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.
가능한 작용기 할당
| 작용기 | 지원 사실 | 인용 출처 | 최고 신뢰도 |
|---|---|---|---|
| Alkyl C-H | 9 | 9 | 1.0 |
| Hydroxyl (O-H) | 5 | 5 | 1.0 |
| Methacrylate | 5 | 5 | 1.0 |
| Acetate | 5 | 5 | 1.0 |
| Carboxyl (COOH) | 5 | 5 | 1.0 |
| Carbonyl (C=O) | 4 | 4 | 1.0 |
| Methoxy (OCH3) | 4 | 4 | 1.0 |
| C-O single bond | 4 | 4 | 1.0 |
| Aromatic ring | 3 | 3 | 1.0 |
| Amide | 3 | 3 | 1.0 |
| Carbonate | 2 | 2 | 1.0 |
| Ketone | 2 | 2 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Carbohydrate | 2 | 2 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.
Possible materials
| 재료 | 지원 피크 | Overlapping groups | 인용 출처 |
|---|---|---|---|
| Chitosan | 1429, 1650, 1655 | Alkyl C-H, Acetate, Methacrylate | 1 |
| graphene oxide | 1429, 1150, 3400 | Hydroxyl (O-H), Methacrylate, Acetate | 1 |
| cellulose | 1429, 1735, 1650 | Alkyl C-H, Acetate, Methacrylate | 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 1429 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.
이 할당의 배경이 되는 문헌
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Silicate 신뢰도 1.0
“The sodium silicate μL and 100 DMSO per well was added to dissolve the shows the absorption bands around 1429, 970, 864 and cm-1”
Fabrication of Biogenic Silica Nanostructures from Sorghum bicolor Leaves for Food Industry Applications DOI: 10.1007/s12633-020-00379-4 -
Carboxyl (COOH) 신뢰도 1.0
“Atomic Force Microscopy vibrations at 1429 and 1380 showed the surface roughness which up surged with an increase in the concentration of boric acid in”
Reticulated three-dimensional network ablative composites for heat shields in thermal protection systems DOI: 10.1039/c4ra05811a -
신뢰도 1.0
“ATR-FTIR spectra of different amino acid coKeywords: cm-1 functionalised FITC-GONP showed an increase in the FTIR band intensity at 1429 which was oxide nanoparticles Graphene significantly reduced due to electrostatic/pi-pi interactions of”
Fluorometric estimation of amino acids interaction with colloidal suspension of FITC functionalized graphene oxide nanoparticles DOI: 10.1016/j.apsusc.2016.11.070 -
Hydroxyl (O-H) 신뢰도 1.0
“The peaks at 1429 and 1340 are related to the vibrations of cm-1 the -OH and -CH groups in the pyranose ring.”
Rupiasih 等 - 2018 - Study on Transport Properties of Chitosan Membrane DOI: 10.5614/j.math.fund.sci.2018.50.2.6 -
Alkyl C-H 신뢰도 1.0
“The bands at 1429 1163 1032 and cm-1 β-linked 892 are attributed to C-H bending and C-O-C stretching of glucose subunits.”
Transformation of Oil Palm Waste-Derived Cellulose into Solid Polymer Electrolytes: Investigating the Crucial Role of Plasticizers DOI: 10.3390/polym13213685 -
Carbonyl (C=O) 신뢰도 1.0
“Explicit assignment in text.”
Pyrolysis of Solid Waste for Bio-Oil and Char Production in Refugees’ Camp: A Case Study DOI: 10.3390/en14133861 -
Alkyl C-H 신뢰도 1.0
“1467 (0.03) HC CC/CH asymmetric ring stretch 1429 1447 (0.20) 1433 1450 (0.14)”
Hydrogen Bonding in Human Manganese Superoxide Dismutase Containing 3-Fluorotyrosine DOI: 10.1529/biophysj.105.060616 -
신뢰도 1.0
“cm-1 The chelated structures are indicated by the bands at 3121 (P1, P2) and are 32cm-1 calcium carbonate, assigned to CaCO 3, and the vibrations specific to CO at 1429 cm-1 (P1) and 1438 (P2) [31] are also present in the FTIR spectra of th”
The Origin and Physico-Chemical Properties of Some Unusual Earth Rock Fragments DOI: 10.3390/app12030983
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