What absorbs at 3233 cm⁻¹ in an FTIR spectrum?
A band near 3233 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 4 cited sources
Hurtigt svar
A band near 3233 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 |
|---|---|---|---|
| Acetate | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 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 |
|---|---|---|---|
| TiO2 | 3233, 1700, 1093 | Hydroxyl (O-H), Alkyl C-H, Acetate | 1 |
| ZnO | 3233, 1400, 3430 | Hydroxyl (O-H), Alkyl C-H, Acetate | 1 |
| TiO | 3233, 1730, 1699 | Alkyl C-H, Hydroxyl (O-H), Acetate | 1 |
| HCl | 3233, 1708, 1032 | Hydroxyl (O-H), Acetate | 1 |
| TiO2 nanoparticles | 3233, 1700, 455 | Hydroxyl (O-H), Alkyl C-H, Acetate | 1 |
| zinc oxide nanoparticles | 3233, 1744, 1627 | Acetate, Alkyl C-H, Hydroxyl (O-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 3233 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
-
Hydroxyl (O-H) tillid 1,0
“The formulated candelilla, which is a mixture of glyceryl stearate and lesser amounts of natural waxes, also exhibits the strong and wide bands associated with the OH stretching vibrations at 3296 and 3233 cm-1 and the band due to the C-O s”
Characterization of Waxes in the Roman Wall Paintings of the Herculaneum Site (Italy) DOI: 10.3390/app122111264 -
Alkene (C=C) tillid 1,0
“FTIR spectra peak represents a high-intensity broadband around cm-1 3233 due to stretching alkenyl group made of zinc acetate Fourier Transforms Infrared salts and their reduction of ZnO NPs.”
Gupta 等 - 2018 - Effective Antimicrobial Activity o Green ZnO Nano DOI: 10.3389/fmicb.2018.02030 -
Hydroxyl (O-H) tillid 0,95
“Explicit assignment: stretching vibration of -OH groups.”
Developing Further Versatility in Benzoxazine Synthesis via Hydrolytic Ring-Opening DOI: 10.3390/polym12030694 -
tillid 0,9
“Same as above.”
Radoman 等 - 2015 - Effect of surface modified TiO2 nanoparticles on t DOI: 10.3144/expresspolymlett.2015.83
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