What absorbs at 437 cm⁻¹ in an FTIR spectrum?
A band near 437 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 437 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.
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Metal oxygen | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Silicate | 1 | 1 | 1,0 |
| Triglyceride | 1 | 1 | 1,0 |
| Fatty acid | 1 | 1 | 1,0 |
| Bromine | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Metalloid oxygen | 1 | 1 | 0,9 |
| Methoxy (OCH3) | 1 | 0 | 1,0 |
| Methacrylate | 1 | 0 | 1,0 |
| C-O single bond | 1 | 0 | 1,0 |
| Acetate | 1 | 0 | 1,0 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Possible materials
| Материал | Поддерживающие пики | Overlapping groups | Цитируемые источники |
|---|---|---|---|
| ZnO | 437, 1400, 3430 | Metal oxygen | 3 |
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 437 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.
Литература, лежащая в основе этих назначений
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достоверность 1,0
“We have observed six absorption peaks at 437, 917, 2157, 2852, 2925 and cm-1 3749 which are related to Zn-O, Al-N, N-O, Alkaline group, C-H stretching vibration and Zn-Al vibrational modes respectively.”
Enhancement of Al-N co-dopant solubility in ZnO by high temperature thermal annealing DOI: 10.1016/j.ceramint.2018.10.005 -
достоверность 1,0
“The 437cm-1 E characteristic peak, assigned to the non-polar 2 optical phonon mode, is present for the pure and Mn-doped ZnO thin films, with a similar shape.”
Kharroubi 等 - 2012 - Mn doping effect on the structural properties of Z DOI: 10.1088/0031-8949/86/01/015805 -
достоверность 1,0
“The peak at around 437 is assigned to sized Mg(OH) prepared using EDA and TEA (Fig.”
Mageshwari 和 Sathyamoorthy - 2012 - Studies on Photocatalytic Performance of MgO Nanop DOI: 10.1007/s12666-011-0106-5 -
достоверность 1,0
“The Raman bands at 583 and intensity of Raman band at 437 decreased with cm-1 are associated with structural disorders, such as oxygen doping concentration into ZnO that may be attributed to 660 Mn vacancy, the Zn interstitial, impurity ato”
Vinod 等 - 2015 - Quenching and blue shift of UV emission intensity DOI: 10.1016/j.mseb.2014.10.004 -
Silicon (Si) достоверность 1,0
“437cm-1 phological change observed in the synthesized The band at is related to the Si-O-Si bending geopolymer is due to the dissolution of metakaolin aluvibration.”
El Alouani 等 - 2019 - Preparation, Characterization, and Application of DOI: 10.1155/2019/4212901 -
достоверность 1,0
“Wefoundthe520cm-1,460cm-1,437cm-1 and417cm-1 cm-1 peakswithinthe300-600 range, due to the presence of C-X bonds (X = halogen: Cl, Br, I), as well as of plane defor-”
Determination of the Conservation State of Some Documents Written on Cellulosic Support in the Poni-Cerntescu Museum, Iași City in Romania DOI: 10.3390/app11188726 -
Fatty acid достоверность 1,0
“3A shows the FTIR spectra between 4000 and 400 The oil spectrum is characterized 437 by several bands (peaks), mainly attributed to the presence of oleic and linoleic fatty acids, 438 triglycerides and peroxides.”
Kharbach 等 - 2021 - New insights into the Argan oil categories charact DOI: 10.1016/j.talanta.2020.122073 -
Metal oxygen достоверность 1,0
“[65] assigned the band at 437 cm-1 in silicate structures to Mg-O stretch + O-Si-O”
Zviagina 等 - 2020 - Distinguishing Features and Identification Criteri DOI: 10.3390/min10020153
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