What absorbs at 3466 cm⁻¹ in an FTIR spectrum?
A band near 3466 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 3466 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 6 | 6 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 0,9 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| SiO2 | 3466, 1739, 699 | Hydroxyl (O-H) | 1 |
| Quercetin | 3466, 1745, 1612 | Hydroxyl (O-H) | 1 |
| biodiesel | 3466, 858, 3470 | Hydroxyl (O-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 3466 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
-
Hydroxyl (O-H) förtroende 1,0
“Peak at 3466 indicates the presence of OH functional group.”
Jon 等 - 2013 - Influence of silica addition on the properties of DOI: 10.1002/app.38997 -
Hydroxyl (O-H) förtroende 1,0
“the OH stretching vibration, located at 3466 and 3578 Because of their very low intensity and superposition with cm(cid:4)1 These bands match the bands observed at 3466 and 3584”
Altnoeder 等 - 2013 - Chirality-dependent balance between hydrogen bondi DOI: 10.1039/c3cp50708d -
Hydroxyl (O-H) förtroende 1,0
“The FTIR cm1 spectra show a broad peak in the region at 3466 corresponding to the hydroxyl (OH) stretching vibration Fig.”
Assaedi 等 - 2015 - Characterisation of mechanical and thermal propert DOI: 10.1007/s40145-015-0161-1 -
förtroende 1,0
“The absorption band at cm-1 cm-1 3466 is related to N-H groups.”
Design and preparation of nanoarchitectonics of LDH/polymer composite with particular morphology as catalyst for green synthesis of imidazole derivatives DOI: 10.1038/s41598-022-15582-z -
Hydroxyl (O-H) förtroende 1,0
“LLM confirmed rule peak-group candidate”
Kumar 等 - 2014 - Studies on carcinogenic PAHs emission generated by DOI: 10.2478/pjct-2014-0009 -
Hydroxyl (O-H) förtroende 0,9
“Explicit assignment: 'broad peak at 3466 represents O-H stretch'.”
Naseem 等 - 2022 - Synthesis and Application of Cobalt-based Metal-or DOI: 10.15255/CABEQ.2021.1960 -
Hydrogen bond förtroende 0,9
“Explicit assignment.”
Anti-Proliferative Potential of Quercetin Loaded Polymeric Mixed Micelles on Rat C6 and Human U87MG Glioma Cells DOI: 10.3390/pharmaceutics14081643 -
Hydroxyl (O-H) förtroende 0,8
“-OH groups”
Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal DOI: 10.3390/polym10020220
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