What absorbs at 1443 cm⁻¹ in an FTIR spectrum?
A band near 1443 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 1443 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.
可能性のある官能基アサイン
| 官能基 | 裏付け事実 | 引用元 | 最高信頼度 |
|---|---|---|---|
| Alkyl C-H | 5 | 5 | 1.0 |
| Methoxy (OCH3) | 4 | 4 | 1.0 |
| Methacrylate | 4 | 4 | 1.0 |
| Acetate | 4 | 4 | 1.0 |
| C-O single bond | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Aromatic ring | 3 | 3 | 1.0 |
| Alkene (C=C) | 3 | 3 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Ring structure | 2 | 1 | 1.0 |
| Nitrogen heterocycle | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Silicon carbon | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| C#c | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Lewis acid site | 1 | 0 | 1.0 |
ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。
Possible materials
| 素材 | 補助ピーク | Overlapping groups | 引用元 |
|---|---|---|---|
| PVA | 1443, 1660, 2930 | Alkyl C-H, Acetate, Methacrylate | 1 |
| biochar | 1443, 1640, 1115 | Alkyl C-H, Methacrylate, Acetate | 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 1443 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.
これらのアサインの根拠となる文献
-
Carbonate 信頼度 1.0
“Besides already exchanged with the nitrate ions that initially cm-1 that, a peak of 1443 refers to the carbonate stretching occupied the interlayer host.”
Bohari 等 - 2022 - Synthesis and Characterization of 2,4-Dichlorophen DOI: 10.22146/ijc.73546 -
C#c 信頼度 1.0
“LLM confirmed rule peak-group candidate”
Characterization of short-length multi-walled carbon nanotubes and cytotoxicity on MDA-MB-231 and HUVEC cell lines DOI: 10.1007/s42823-019-00081-5 -
Hydroxyl (O-H) 信頼度 1.0
“The characteristic bands in cm-1 cm-1 the spectrum at 3213.31 (-OH stretching) and 1443.35 (-CH 2stretching) were observed cm-1 with higher intensity.”
Sprayed in-situ synthesis of Polyvinyl alcohol/Chitosan loaded Silver nanocomposite hydrogel for improved antibacterial effects DOI: 10.1016/j.ijbiomac.2019.09.186 -
Hydroxyl (O-H) 信頼度 1.0
“Fig6 shows a brand value of nearly 1052 cm-1 indicates stretching vibration of the C-O group and 1443.2 indicates the presence O-H group.”
Manimegalai 等 - 2022 - Experimental investigation on ferrofluid propertie DOI: 10.15251/DJNB.2022.172.661 -
Alkyl C-H 信頼度 1.0
“The aliphatic deformation/bending peak characterized cm-1 at 1443 showed absorption similar to that of the aromatic C=C band.”
Mathews 和 Singh - 2016 - Characterization of solid bitumen from Panandhro l DOI: 10.18520/cs/v111/i11/1842-1846 -
Alkyl C-H 信頼度 1.0
“-CH2groups were confirmed theO-Hstretchingfrequencyofsilanolgroupsbondedtothe peaks and methylene bridges bythestrongabsorptionsat662and630cm-1 and1443cm-1 inorganicstructure,andtheintensebandrelatedtotheSi-O- ,”
Alahmadi 等 - 2013 - Preparation of Organic-Inorganic Hybrid Materials DOI: 10.1155/2013/634863 -
Alkyl C-H 信頼度 1.0
“The bands between 1443 and 1382 Characterization of carboxylated PETco textiles cm-1 correspond to = C-H bonds in the aromatic ring of the cm-1 linker.”
Alejandro Torres-Cortes 等 - 2022 - Ex situ synthesis of MOF@PETcotton textile fibers DOI: 10.1007/s10965-022-03216-x -
Alkyl C-H 信頼度 1.0
“Minor band at 1443 Three various biochars were produced through oxygencm-1 from CH scissoring [44].”
Simultaneous immobilization of heavy metals in soil environment by pulp and paper derived nanoporous biochars DOI: 10.1007/s40201-018-0294-6
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