What absorbs at 916 cm⁻¹ in an FTIR spectrum?
A band near 916 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 916 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 |
|---|---|---|---|
| Oxygen heterocycle | 5 | 5 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Metal hydroxyl | 1 | 1 | 1,0 |
| Sulfur heterocycle | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 0 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 0 | 1,0 |
| Silicon (Si) | 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 |
|---|---|---|---|
| epoxy resin | 916, 905, 1100 | Methacrylate, Methoxy (OCH3), Oxygen heterocycle | 1 |
| hematite | 916, 1030, 469 | Hydroxyl (O-H) | 1 |
| goethite | 916, 1470, 696 | Hydroxyl (O-H) | 1 |
| cellulose nanocrystals | 916, 1110, 1640 | Methacrylate, Methoxy (OCH3), Hydroxyl (O-H) | 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 916 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
-
Oxygen heterocycle достоверность 1,0
“LLM confirmed rule peak-group candidate”
Barbadillo 等 - 2003 - Study of a curing reaction of an epoxy resin DOI: 10.4028/www.scientific.net/MSF.426-432.2163 -
Aromatic ring достоверность 1,0
“The 1145cm-1 1080cm-1 absorption peak at and corresponded to the benzene ring =C-H bending vibration 916cm-1 in the plane.”
Li 等 - 2011 - The detection of Cypermethrin on the surface of Ap DOI: 10.4028/www.scientific.net/AMR.287-290.2991 -
Hydroxyl (O-H) достоверность 1,0
“ceous material (CA-1 and CA-2) 2 naceous material (CA-1 and CA-2) cm-1 Band located at 916 is attributed to the vibration of CO adsorption capacity of carbonaceous material the group O-H [39-41].”
CO2 adsorption of bagasse waste feedstock using thermogravimetric analyses DOI: 10.1007/s10973-021-10949-2 -
Acetate достоверность 1,0
“A small peak at 916 cm-1 represented the glycosidic cm-1 C-O-C vibration of the pyranose ring skeletal [33].”
Extraction and Characterization of Cellulose Nanocrystals from Tea Leaf Waste Fibers DOI: 10.3390/polym9110588 -
Acetate достоверность 1,0
“The bands appearing at ~1167, ~1125 and ~1045 are associated with the C-O-C bending vibration in the propylene oxide group [21,22], while the bands at ~916, ~838 cm-1 are the characteristic bands of the stretching vibrations of the C-S-C bo”
Jamal 等 - 2014 - Solid-State Synthesis and Photocatalytic Activity DOI: 10.3390/ma7053786 -
достоверность 1,0
“cm-1 δ δ region, two peaks at 916 and 844 are related to (Al 2OH) and (AlMgOH).”
The Antimicrobial Properties of Modified Pharmaceutical Bentonite with Zinc and Copper DOI: 10.3390/pharmaceutics13081190 -
Oxygen heterocycle достоверность 1,0
“Finally, no clear correlation could be detected between the area of cm(cid:0) 1 the weak epoxy band at 916 (asymmetric oxirane ring deforma4.2.”
Morsch 等 - 2023 - The effect of cross-linker structure on interfacia DOI: 10.1016/j.apsusc.2022.155380 -
Hydroxyl (O-H) достоверность 1,0
“Whereas the band at 3632 is due to the -OH band stretch of cm-1 structural Al-OH, the bands at 916 and 884 are attributed to AlAlOH and AlFeOH bending vibrations, respectively.”
Wojcik-Bania 和 Matusik - 2021 - The Effect of Surfactant-Modified Montmorillonite DOI: 10.3390/ma14102623
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