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
Snabbt 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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| 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 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| 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 |
Material visas endast när samma litteraturpool stöder detta band och minst en ytterligare karakteristisk topp.
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.
Användning i verkligheten
Denna typ av fråga är vanlig inom polymeridentifiering, screening av okänd plast, felsökning av kvalitetskontroll, verifiering av återvunnet material och litteraturstödd toppidentifieringsgranskning.
Vanliga misstag
- Behandla ett isolerat band som bevis på ett material utan att kontrollera minst en eller två stödjande toppar.
- Ignorerar överlapp: flera funktionella grupper kan bidra nära samma vågtal.
- Hoppa över validering när tillsatser, blandningar, oxidation eller föroreningar kan förvränga spektrat.
Verifieringsråd
När oklarhet kvarstår, validera hypotesen med DSC, GC-MS eller TGA, särskilt för blandningar, nedbrutna prover och fyllda polymerer.
Litteratur bakom dessa identifieringar
-
förtroende 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) förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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 -
förtroende 0,9
“Same as above.”
Chu 等 - 2019 - Facile Preparation of g-C3N4-WO3 Composite Gas Sen DOI: 10.1155/2019/6074046
Har du ett spektrum med detta band?
Ladda upp ditt FTIR-spektrum och få en fullständig tolkningsrapport – toppidentifieringar med litteraturhänvisningar, biblioteksmatchningar och en förtroendebedömd beviskedja – på sekunder.