What absorbs at 852 cm⁻¹ in an FTIR spectrum?
A band near 852 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 7 cited sources
Jawapan pantas
A band near 852 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 |
|---|---|---|---|
| Nitro (NO2) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Oxygen heterocycle | 1 | 1 | 0.9 |
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 |
|---|---|---|---|
| chitosan | 852, 1650, 1655 | Methacrylate, Methoxy (OCH3) | 1 |
| chitin | 852, 1650, 1655 | Methacrylate, Methoxy (OCH3) | 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 852 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
-
Carbonate keyakinan 1.0
“Patients crystal, is calculated from the ratio of the integrated area of were identified utilizing prospectively collected data for 60 890cm1) the n2 carbonate peak (852 to and that of the patients who underwent instrumented posterior lumba”
Okano 等 - 2020 - Correlation between Urine N-Terminal Telopeptide a DOI: 10.1155/2020/5725086 -
Acetate keyakinan 1.0
“The FTIR spectrum of PPP/PEG-NH/Hys/MAB (Figure 3a) exhibited the typical absorption peaks at 2926 and 2869 cm-1 (-CH2-, asymmetric and symmetric stretching vibrations), 1713 cm-1 (C=O, stretching vibration), 1600 and 1524 cm-1 (aromatic C-”
Design and Synthesis of Amphiphilic Graft Polyphosphazene Micelles for Docetaxel Delivery DOI: 10.3390/pharmaceutics15051564 -
Nitro (NO2) keyakinan 1.0
“as(C-N) s(C-N) (ν ν for the corresponding azanion at 1487 and at 1321 The C-N stretching cm-1), cm-1 B vibration of (852 characteristic for the nitro group, was shifted about 4 to a lower B-azanion.”
Tisovsky 等 - 2017 - Effect of Structure on Charge Distribution in the DOI: 10.3390/molecules22111961 -
keyakinan 0.9
“Explicit assignment: 'peaks at 852 and 912 the bands of O2'”
Subbotina 和 Barsukov - 2020 - Direct evidence of the key role of UV-formed perox DOI: 10.1039/C9CP04728J. -
keyakinan 0.9
“Text: '852 typical of ... C-H equatorial vibrations'.”
Tiburu 等 - 2017 - Formation of Chitosan Nanoparticles Using Deacetyl DOI: 10.4028/www.scientific.net/JNanoR.48.156 -
Oxygen heterocycle keyakinan 0.9
“Text: '852와' in context of epoxide group.”
Park 等 - 2013 - Curing Behaviors of Transparent Aliphatic Epoxy Ac DOI: 10.7317/pk.2013.37.3.302 -
keyakinan 0.7
“Text: 'at 852 revealed the presence of absorption oscillations of bond.'”
Chemical characterization and antioxidant properties of exopolysaccharides from mangrove filamentous fungi Fusarium equiseti ANP2 DOI: 10.1016/j.btre.2018.e00277
Ada spektrum dengan jalur ini?
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