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
Hurtigt svar
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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 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 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| 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 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
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.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
tillid 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) tillid 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 tillid 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 tillid 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 tillid 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 tillid 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 tillid 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 -
tillid 0,9
“Same as above.”
Chu 等 - 2019 - Facile Preparation of g-C3N4-WO3 Composite Gas Sen DOI: 10.1155/2019/6074046
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