What absorbs at 934 cm⁻¹ in an FTIR spectrum?
A band near 934 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 934 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 |
|---|---|---|---|
| C c single bond | 4 | 4 | 1,0 |
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Fluorine (C-F) | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Protein alpha helix | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Silicate | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 0,9 |
| Perchlorate | 1 | 1 | 0,7 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| HCl | 934, 1708, 1032 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| polyvinylpyrrolidone | 934, 1660, 1700 | Methacrylate, Acetate | 1 |
| DNA | 934, 1712, 1660 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| PVP | 934, 2983, 1648 | Methacrylate, Acetate | 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 934 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
-
tillid 1,0
“The higher-intensity peak of 934.44 eV is attributed to Cu (II) species shown”
Ibrahim 等 - 2023 - Role of ammonium phosphate in improving the physic DOI: 10.37190/ppmp/161510 -
Acetate tillid 1,0
“The peak at 933.59 denotes vibrations from C-O stretching [43].”
Mahardiani 等 - 2022 - Nanofiber Fabrication from Palm Fiber Waste for Su DOI: 10.48317/IMIST.PRSM/morjchem-v10i2.32648 -
Silicon (Si) tillid 1,0
“cm-1 The intense peak located at 934 corresponds to asymmetric stretching of Si-O-Si bonds.”
Structural and optical properties of green emitting Y2SiO5:Tb3+ and Gd2SiO5:Tb3+ nanoparticles for modern lighting applications DOI: 10.1007/s12598-020-01585-0 -
tillid 1,0
“The ν(C-F) shows two bands at ~934 and 990 cm-1, the latter resulting from Assignment A Conformation B Conformation vibrations characteristic of the pentafluorobenzoate group.”
The Application of ATR-FTIR Spectroscopy and the Reversible DNA Conformation as a Sensor to Test the Effectiveness of Platinum(II) Anticancer Drugs DOI: 10.3390/s18124297 -
C c single bond tillid 1,0
“The peak at 758 800 (cid:3)C for all the PVP amount exhibit and also is assigned to the C-C an unreacted ZnO phase at the peak position of ring vibration, while the peak at 934 is due to C-C ring 2h = 36.40(cid:3) which corresponds to the 0”
Alibe 等 - 2019 - Effects of polyvinylpyrrolidone on structural and DOI: 10.1007/s10973-018-7874-7 -
Silicate tillid 1,0
“this peak was attributed to the reduction of Cu0/Cu1+ main peaks located at 933.5 eV and 935.8 eV, attributed to the presence of and Ni2+ in nickel silicate [36].”
Enhanced Cyclopentanone Yield from Furfural Hydrogenation: Promotional Effect of Surface Silanols on Ni-Cu/m-Silica Catalyst DOI: 10.3390/catal13030580 -
Alkyl C-H tillid 1,0
“The β(C-H) vibrations of the bonded modulator gave rise to peaks at 1072 and 934 cm-1 [48].”
Butova 等 - 2023 - In Situ FTIR Spectroscopy for Scanning Accessible DOI: 10.3390/nano13101675 -
Acetate tillid 1,0
“FTIR spectra 1600 (typical aromatic skeletal vibration), 1491 (disubstituted benzene ring), 1222 (antisymmetric C-O-C stretching vibration), 934 (O-C vibration 2 in the oxazine ring with a minor contribution from the phenolic ring), 753 (Ar”
Developing Further Versatility in Benzoxazine Synthesis via Hydrolytic Ring-Opening DOI: 10.3390/polym12030694
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