What absorbs at 894 cm⁻¹ in an FTIR spectrum?
A band near 894 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 894 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.
Atribuiri posibile ale grupelor funcționale
| Grup funcțional | Fapte suport | Surse citate | Încredere maximă |
|---|---|---|---|
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Ring structure | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Carbohydrate | 1 | 0 | 1,0 |
Clasamentul reflectă dovezile acumulate din literatură, nu o singură regulă autoritară. Confirmați întotdeauna în contextul mostrei dvs.
Possible materials
| Material | Vârfuri suport | Overlapping groups | Surse citate |
|---|---|---|---|
| Chitosan | 894, 1650, 1655 | Alkyl C-H, Hydroxyl (O-H), C-O single bond | 1 |
| cotton fabric | 894, 900, 862 | Alkyl C-H, Hydroxyl (O-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 894 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.
Literatura din spatele acestor atribuiri
-
Ring structure încredere 1,0
“The peak 894 indicated glycosidic -C-Hdeformation, with a ring vibration contribution and -O-H bending.”
Ayu 等 - 2020 - The Production of Nanocrystalline Cel close From O DOI: 10.1063/5.0015667 -
Alkyl C-H încredere 1,0
“Moreover, cm-1 one peak at 894 is attributed to glycoside CH deformation by ring vibration and O-H bending, which is related to b-glycoside bonds between anhydro-glucose units in cellulose (Nelson and O'Connor 1964;”
Birgani 等 - 2021 - Production of Nanocrystalline Cellulose from Bleac DOI: 10.1080/19443994.2015.1041161 -
Alkyl C-H încredere 1,0
“The peak at 897 resulting from vibrations within C-H can be attributed to both cellulose II and chitosan (Figure 7, peak 894”
Grgac 等 - 2020 - The Chitosan Implementation into Cotton and Polyes DOI: 10.3390/ma13071616 -
Acetate încredere 1,0
“1014 Strong C-O stretching 894 Medium O-H deformation”
Jaisankar 等 - 2020 - Seed microstructures of the Andaman padauk (Pteroc DOI: 10.1007/BF02957854. -
Phosphate (PO4) încredere 1,0
“1010, 960 1 P-O(H) stretching 894 895 894 895”
Khanna 等 - 2010 - In Situ Swelling Behavior of Chitosan-Polygalactur DOI: 10.1155/2010/175264 -
Acetate încredere 1,0
“The noticeably increased absorbance in the narrow region cm-1, at 894 assignable to C-O-C and C-O-P symmetric stretching in cell wall oligosaccentred at 894 cm-1, assignable to C-O-C and C-O-P symmetric stretching in cell wall pneumoniaeCol”
Evaluation of Chemical Changes in Laboratory-Induced Colistin-Resistant Klebsiella pneumoniae DOI: 10.3390/ijms22137104 -
Ring structure încredere 1,0
“735-657cm-1isassignedtoamideorCH 2rockingband[18],839cm-1 cm-1 water,2890 is related tothe asymmetrically stretching vibration cm-1 C\\H C\\C of in a pyranoid ring, and the band at 3332 is attributed to the vibrations occurred due to ring b”
Polyethersulfone membrane embedded with amine functionalized microcrystalline cellulose DOI: 10.1016/j.ijbiomac.2020.09.017 -
Alkyl C-H încredere 1,0
“The signal at 1018 assigned to a-CH and asystem in reticulated porous networks treated at high temper3 cm@1 CH bending was maintained, whereas the peak at 894 ature under inert gas.”
Tosi 等 - 2018 - Auto-Crosslinked Rigid Foams Derived from Biorefin DOI: 10.1002/cssc.201800778
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