What absorbs at 834 cm⁻¹ in an FTIR spectrum?
A band near 834 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 834 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Silicon (Si) | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Chlorine | 2 | 2 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Imide | 1 | 1 | 1,0 |
| Acetyl | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Lipid | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 0,9 |
| Metal oxygen | 1 | 0 | 0,9 |
| Oxygen heterocycle | 1 | 0 | 0,9 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| PVC | 834, 1195, 1100 | Alkyl C-H | 3 |
| PMMA | 834, 1722, 1383 | Alkyl C-H | 1 |
| silica | 834, 1100, 1080 | Silicon-oxygen (Si-O), Silicon (Si), Alkyl C-H | 1 |
| SiO2 | 834, 1739, 699 | Silicon-oxygen (Si-O), Alkyl C-H, Silicon (Si) | 1 |
| silver nanoparticles | 834, 1636, 1631 | 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 834 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
-
Silicon (Si) tillid 1,0
“While, absorption at 834 shows the Si-O-Si asymmetric of silanol (Si-OH) at 966 cm-1 there were absorption stretching [24].”
Ismail 等 - 2015 - Effect of Radiation on Properties of ENRPVCSiO2 DOI: 10.1063/1.4931308 -
C c single bond tillid 1,0
“Besides, the bands between 600 cm-1 and 700 cm-1, 834 cm-1 could be attributed cm-1 ascribed to the C-C stretching and -CH wagging, respectively.”
Understanding Hydrothermal Dechlorination of PVC by Focusing on the Operating Conditions and Hydrochar Characteristics DOI: 10.3390/app7030256 -
tillid 1,0
“For PVC, C H stretching mode can be S.Rameshetal./SpectrochimicaActaPartA66(2007)1237-1242 1239 Table2 VibrationalmodesandwavenumbersexhibitedbyPMMA Wavenumbers(cm-1) Descriptionofvibrations References C Hstretching 2927-2986 [30,32] C Ostr”
Ramesh 等 - 2007 - FTIR studies of PVCPMMA blend based polymer elect DOI: 10.1016/j.saa.2006.06.012 -
tillid 1,0
“The pronounced in the Synth1 sample, where the three bands are cm-1 strong and sharp peaks at 834 and 705 are assigned to the not anymore identifiable and a unique broad band is observed, n2 n4 out-of-plane OCO bending mode and to the antis”
Investigation of the hydrozincite structure by infrared and solid-state NMR spectroscopy DOI: 10.2138/am.2013.4158 -
Alkyl C-H tillid 1,0
“cm1 cm1 stretching at 671.43 and 892.51 The peaks at 834.50 and 798.47 indicate C-H deformation and ring stretching of trisubstituted benzene.”
Agrawal 等 - 2023 - Biotreatment of azo dye containing textile industr DOI: 10.21203/rs.3.rs-1876766/v2 -
Lipid tillid 1,0
“Medium-weak bands, only detectable in the FTIR spectrum of carnauba wax at 1634, 1607, 1515 and 834 cm-1, are attributed to the skeletal ring breathing modes of aromatic groups [30,47].”
Characterization of Waxes in the Roman Wall Paintings of the Herculaneum Site (Italy) DOI: 10.3390/app122111264 -
tillid 1,0
“The cm(cid:1)1 N-H peak at 834 is due to the out-of-plane bending”
Facile simultaneous synthesis of tetraaniline nanostructures/silver nanoparticles as heterogeneous catalyst for the efficient catalytic reduction of 4-nitrophenol to 4-aminophenol DOI: 10.1039/d0ra03327h -
tillid 1,0
“It was 1089.6cm-1 (S=O stretching vibration) and 1136.8, and also observed that some peaks shown by pure etoricoxib 639.22009cm-1 (C-Cl stretching vibra834.0, 777.1, and were absent, and the intensity of peaks of these etoricoxib tion).”
Das 等 - 2011 - Solubility and dissolution enhancement of etoricox DOI: 10.5402/2011/819765
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