What absorbs at 412 cm⁻¹ in an FTIR spectrum?
A band near 412 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 412 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 |
|---|---|---|---|
| Metal oxygen | 2 | 2 | 0,9 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Amide | 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 |
|---|---|---|---|
| Chitosan | 412, 1650, 1655 | Methacrylate, C-O single bond, Methoxy (OCH3) | 1 |
| polyethylene | 412, 1737, 1720 | Methacrylate, Methoxy (OCH3), C-O single bond | 1 |
| Glycerol | 412, 1585, 1630 | Methacrylate, C-O single bond, Methoxy (OCH3) | 1 |
| ZnO | 412, 1400, 3430 | Metal oxygen, Methacrylate, C-O single bond | 1 |
| zinc oxide | 412, 1627, 1638 | Metal oxygen, Methacrylate, C-O single bond | 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 412 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
“3 60,687 = = 412 3430 Weak deformation vibration O S O 411 62,778 1 59,348”
A case study of poly (aryl ether sulfone) hemodialysis membrane interactions with human blood: Molecular dynamics simulation and experimental analyses DOI: 10.1016/j.cmpb.2020.105742 -
Amide förtroende 1,0
“(2) disappears in had new absorption peaks at 1,640 cm-1 1,412cm-1, 1,556 and corresponding to amide I peak (1,652 cm-1),”
Khodaei 等 - 2018 - Covalent Immobilization of Protein A on Chitosan a DOI: 10.1093/chromsci/bmy070 -
förtroende 1,0
“For pastes with a 3:7 proportion (Fig 9a), 412 this band disappeared, which represents a complete consumption of the calcium 413”
Moraes 等 - 2019 - Production of bamboo leaf ash by auto-combustion f DOI: 10.1016/j.conbuildmat.2019.03.007 -
Hydrogen bond förtroende 1,0
“M412 deprotonated retinylidene SB such as seen for the BR 3 Depending on the strength of the hydrogen bonding, bands M412 transition, where the SB of is deprotonated (27).”
Proton Transfers in a Channelrhodopsin-1 Studied by Fourier Transform Infrared (FTIR) Difference Spectroscopy and Site-directed Mutagenesis* DOI: 10.1358/dot.2011.47.1.1543306 -
Alkyl C-H förtroende 1,0
“The and compared in the pure oil and in the deuterated fatty 349 412 cm-1 CC-H olefinic different peak from unsaturated lipids at 3008 tissues.”
Rejasse 等 - 2022 - Plastic biodegradation Do Galleria mellonella Lar DOI: 10.1021/acs.est.1c03417 -
C=n förtroende 1,0
“This indicated that the homogeneous complex had been prepared could be due to υ(C=N) and υ(C-O), and the bands at about 605 and 412 cm-1 were associated with successfully.”
Base-Free Selective Oxidation of Glycerol over LDH Hosted Transition Metal Complexes Using 3% H2O2 as Oxidant DOI: 10.3390/catal6070101 -
Metal oxygen förtroende 0,9
“Assigned to transverse optical stretching mode of ZnO.”
Kuthirummal 等 - 2016 - Synthesis and characterization of Ar-annealed zinc DOI: 10.1063/1.4964316 -
Metal oxygen förtroende 0,9
“Explicit assignment: 'absorption bands at 419 and 412 attributed to the Zn-O stretching vibration mode'”
Gum Arabic As Natural Stabilizing Agent In Green Synthesis Of ZnO Nanofluids For Antibacterial Application DOI: 10.1016/j.jece.2019.103331
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