What absorbs at 822 cm⁻¹ in an FTIR spectrum?
A band near 822 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 822 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 |
|---|---|---|---|
| Aromatic ring | 3 | 3 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 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 |
|---|---|---|---|
| cellulose | 822, 1735, 1650 | Alkyl C-H | 1 |
| activated carbon | 822, 1575, 1210 | Alkyl C-H, Aromatic ring | 1 |
| ZnO | 822, 1400, 3430 | Metal oxygen, Alkyl C-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 822 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
-
încredere 1,0
“Larvicidal Property of Green Synthesized Silver Nanoparticles against Vector Mosquitoes 5 cm(cid:1)1), production would be an appropriate for extending the biologstretching 1388.16 aliphatic amine group (C-N stretchcm(cid:1)1), ical route f”
Larvicidal property of green synthesized silver nanoparticles against vector mosquitoes (Anopheles stephensi and Aedes aegypti) DOI: 10.1016/j.jksus.2015.10.006 -
Hydroxyl (O-H) încredere 1,0
“Zn-O 600 679 680 670 Stretching 822 885 885 884 Weak vibration of ZnO Declaration of competing interest O-H 1008 1008 1008 983 asymmetric stretching”
Role of dysprosium doping concentration on structural deformation of zinc oxide nanoparticles DOI: 10.1016/j.physb.2021.413313 -
Alkyl C-H încredere 1,0
“cm-1 cm-1 3620 (OH stretch), 1612 (C = C aromatic), 1238 (stretching CO), and 829 (stretching cm-1 cm-1 cm-1 CC), while the GO spectrum is 3593 (OH stretch), 1722 (C = O stretch), 1283 (CO cm-1 stretch) and 822 (CH stretch).”
Rukman 等 - 2019 - GO-Fe3O4 Nanocomposite from coconut shell Synthes DOI: 10.1088/1755-1315/217/1/012008 -
Aromatic ring încredere 1,0
“The strong sharp bands at 760 cm-1, 793 cm-1, and 822 cm-1 can be ascribed cm-1 cm-1, to o-disubstituted benzene ring vibration [38].”
Synthesis, Characterization and Biological Activities of New Schiff Base Compound and Its Lanthanide Complexes DOI: 10.3390/ph15040454 -
Alkyl C-H încredere 1,0
“cm-1 is attributed to the C-H stretch vibration, and two The small peak at 822 cm-1 peaks appeared at 618 and 542 band corresponding to the C-H bend, as”
Chemical functional groups of extractives, cellulose and lignin extracted from native Leucaena leucocephala bark DOI: 10.1007/s00226-020-01258-2 -
Metal oxygen încredere 1,0
“The WO6 821.6cm-1 W-O the band at”
Phuruangrat 等 - 2014 - Hydrothermal Synthesis, Characterization, and Visi DOI: 10.1155/2014/138561 -
Aromatic ring încredere 1,0
“Moreover, the existence of a benzene ring in phenol adsorbed by the adsorbent can be confirmed by the peak at 821.68 cm-1.”
Sureshkumar 等 - 2020 - Continuous Phenol Removal Using a Liquid-Solid Cir DOI: 10.3390/en13153839 -
încredere 0,9
“Same as above.”
Chu 等 - 2019 - Facile Preparation of g-C3N4-WO3 Composite Gas Sen DOI: 10.1155/2019/6074046
Aveți un spectru cu această bandă?
Încărcați spectrul FTIR și obțineți un raport complet de interpretare — atribuiri de peak-uri cu citări din literatură, potriviri cu biblioteca și un lanț de dovezi cu nivel de încredere — în câteva secunde.