What absorbs at 867 cm⁻¹ in an FTIR spectrum?
A band near 867 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
Jawapan pantas
A band near 867 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.
Penetapan kumpulan berfungsi yang mungkin
| Kumpulan berfungsi | Fakta sokongan | Sumber dipetik | Keyakinan tertinggi |
|---|---|---|---|
| Methoxy (OCH3) | 3 | 3 | 1.0 |
| Methacrylate | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 1 | 1.0 |
| Sulfate (SO4) | 1 | 1 | 1.0 |
| Sulfonate | 1 | 1 | 1.0 |
| C-S single bond | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Imide | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Amide | 1 | 0 | 1.0 |
Pemeringkatan mencerminkan bukti literatur terkumpul, bukan satu peraturan berwibawa. Sentiasa sahkan terhadap konteks sampel anda.
Bahan yang mungkin
| Bahan | Puncak sokongan | Kumpulan bertindih | Sumber dipetik |
|---|---|---|---|
| nanotubes | 867, 1735, 1630 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| hydroxyapatite | 867, 1620, 1639 | Methacrylate, Acetate | 1 |
Bahan hanya dipaparkan apabila kumpulan literatur yang sama menyokong jalur ini dan sekurang-kurangnya satu puncak ciri tambahan.
Logik spektrum
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 867 cm⁻¹ is usually not enough for material identification by itself.
Penggunaan dunia sebenar
Jenis pertanyaan ini biasa dalam pengenalpastian polimer, saringan plastik tidak diketahui, penyelesaian masalah QC, pengesahan bahan kitar semula, dan semakan tugasan puncak yang disokong oleh literatur.
Kesilapan biasa
- Menganggap satu jalur terpencil sebagai bukti bahan tanpa memeriksa sekurang-kurangnya satu atau dua puncak sokongan.
- Mengabaikan pertindihan: pelbagai kumpulan berfungsi boleh menyumbang berhampiran nombor gelombang yang sama.
- Melangkau pengesahan apabila bahan tambahan, campuran, pengoksidaan, atau pencemaran boleh memesongkan spektrum.
Nasihat pengesahan
Apabila kekaburan masih ada, sahkan hipotesis dengan DSC, GC-MS, atau TGA, terutamanya untuk campuran, sampel terdegradasi, dan polimer terisi.
Literatur di sebalik penetapan ini
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Ring structure keyakinan 1.0
“cm-1 cm-1 R D-ribose increasing time of the accumulation, the values gradually ing, 1049 to C - O stretching, 913 to ct cm-1 D-ribose increase, which can be observed by increasing the diameter ring vibration, and 867 to C endo-sugar.”
Gallic acid-coated silver nanoparticles as perspective drug nanocarriers: bioanalytical study DOI: 10.1007/s00216-022-03955-2 -
Acetate keyakinan 1.0
“1126 1126 Stretching of C-O bond - - 867 867”
Tuning of ferrites (CoxFe3-xO4) nanoparticles by co-precipitation technique DOI: 10.1007/s42452-019-0244-7 -
Acetate keyakinan 1.0
“A cm-1 peak at 867 cm-1 was assigned to CH3 group vibration.”
Basheer 等 - 2020 - Synthesis, Characterization, and Analysis of Hybri DOI: 10.3390/polym12061305 -
keyakinan 1.0
“5c) shows two peaks at 867.3 eV and microscope and energy dispersive X-ray spectrometer (SEM850 eV corresponding to Ni 2p and Ni 2p respectively.”
Flower-like 3-dimensional hierarchical Co3O4/NiO microspheres for 4-nitrophenol reduction reaction DOI: 10.1039/c8na00029h -
Imide keyakinan 1.0
“Band of unsaturation of maleimide disappeared”
Eugenol-based thermally stable thermosets by Alder-ene reaction: From synthesis to thermal degradation DOI: 10.1002/app.39269. -
Metal oxygen keyakinan 1.0
“The spectrum of AM-6 shows a Raman band at 867 cm-1, V-O the basis of the above discussions, a possible model is proposed which is the characteristic for the stretching V-O-V wires.24,37”
Guo 等 - 2012 - Structure and Basicity of Microporous Titanosilica DOI: 10.1021/jp305543m -
Carbonate keyakinan 1.0
“LLM confirmed rule peak-group candidate”
Microstructure and Characteristics of Calcium Phosphate Layers on Bioactive Oxide Surfaces of Air-Sintered Titanium Foams after Immersion in Simulated Body Fluid DOI: 10.3390/ma9120956 -
C-S single bond keyakinan 1.0
“5) exhibits a very strong cm-1, thiourethane bonds and the second stage-the urethane double absorption band at 2,071 and 2,047 characbonds (weakly visible peak at 332-338 (cid:3)C or as shoulder at teristic of asymmetric and symmetric C=O s”
Rogulska 等 - 2013 - New thermoplastic poly(thiourethane-urethane) elas DOI: 10.1007/s10973-013-3007-5
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