What absorbs at 863 cm⁻¹ in an FTIR spectrum?
A band near 863 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
Risposta rapida
A band near 863 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.
Possibili assegnazioni di gruppi funzionali
| Gruppo funzionale | Fatti di supporto | Fonti citate | Affidabilità massima |
|---|---|---|---|
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| S eq o | 1 | 1 | 1,0 |
| Sulfonyl | 1 | 1 | 1,0 |
| N h | 1 | 1 | 0,8 |
La classifica riflette le prove bibliografiche accumulate, non una singola regola autorevole. Conferma sempre nel contesto del tuo campione.
Materiali possibili
| Materiale | Picchi di supporto | Gruppi sovrapposti | Fonti citate |
|---|---|---|---|
| silica | 863, 1100, 1080 | Methacrylate, Acetate | 1 |
| Epoxy Resin | 863, 905, 1100 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| zinc oxide | 863, 1627, 1638 | Methacrylate, Acetate, C-O single bond | 1 |
| zinc oxide nanoparticles | 863, 1744, 1627 | Acetate, Methacrylate, Methoxy (OCH3) | 1 |
I materiali vengono mostrati solo quando lo stesso pool di letteratura supporta questa banda e almeno un picco caratteristico aggiuntivo.
Logica dello spettro
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 863 cm⁻¹ is usually not enough for material identification by itself.
Utilizzo nel mondo reale
Questo tipo di richiesta è comune nell＇identificazione dei polimeri, nello screening di plastiche sconosciute, nella risoluzione dei problemi di controllo qualità, nella verifica dei materiali riciclati e nella revisione dell＇assegnazione dei picchi supportata dalla letteratura.
Errori comuni
- Trattare una banda isolata come prova di un materiale senza verificare almeno uno o due picchi di supporto.
- Ignorando la sovrapposizione: più gruppi funzionali possono contribuire vicino allo stesso numero d＇onda.
- Saltare la convalida quando additivi, miscele, ossidazione o contaminazione possono distorcere lo spettro.
Consiglio di verifica
Quando permangono ambiguità, convalida l＇ipotesi con DSC, GC-MS o TGA, specialmente per miscele, campioni degradati e polimeri caricati.
Letteratura dietro queste assegnazioni
-
Sulfonyl affidabilità 1,0
“Intensity varies with sample crystallinity 1218 C=O=C Stretching 1020, 1080, 1170 O=S=O Stretching 863, 841, 700”
Vibrational spectroscopic study of pure and silica-doped sulfonated poly(ether ether ketone) membranes DOI: 10.1016/j.saa.2014.12.004 -
affidabilità 1,0
“In 2 cm-1 pure PVC sample A, the C-H stretching peak at 2972 cm-1 and C-Cl stretching observed at 863 [33].”
Dynamic mechanical and optical characterization of PVC/fGO polymer nanocomposites DOI: 10.1007/s00339-018-2026-2 -
Amide affidabilità 1,0
“glucosamine C high temperature, concentration of alkali, reaction time, 2 cm-1 was ascribed to edulis chitosan spectrum, a peak at 863 previous treatment of the chitin, particle size, chitin cm-1 C-N were stretching, absorption peaks at 101”
Varma 和 Vasudevan - 2020 - Extraction, Characterization, and Antimicrobial Ac DOI: 10.1021/acsomega.0c01903 -
Acetate affidabilità 1,0
“During the curing process of epoxy resin, the FTIR band intensity of C-O-C and C-O cm-1 of the anhydrous epoxoid ring at 917 and 863 decreased, and the band intensity cm-1 at 1672 increased [35,39,54], indicating complete resin polymerizati”
Abu Zeid 和 Edrees - 2022 - Hydration Characterization of Two Generations of M DOI: 10.3390/app12073517 -
affidabilità 1,0
“ESI-MS molecular-ion peak 863.21, corresponding to H+ + 1H [Zn(L7) ].”
Gusev 等 - 2020 - Synthesis, Photoluminescence and Electrical Study DOI: 10.3390/ma13245698 -
affidabilità 1,0
“A characteristic cm-1 stored in an airtight glass vial, labeled as ZnO-NPs, and was band observed at 863 corresponds to the Zn-O stretching stored at room temperature for physicochemical, morphological bond (Ta¸s et al., 2000;”
Biogenic Synthesis and Characterization of Antimicrobial and Antiparasitic Zinc Oxide (ZnO) Nanoparticles Using Aqueous Extracts of the Himalayan Columbine (Aquilegia pubiflora) DOI: 10.3389/fmats.2020.00249 -
Aromatic ring affidabilità 1,0
“In the fingerprint region of FA, the ≤ ± 0.05) among the samples (63.98 0.34 %), but as the concentration cm(cid:0) cm(cid:0) 1 1 characteristics peaks at 863 and 804 correspond to the two ± of RSN increased to 20 % EE declined to 52.23 0.7”
Ferulic acid loaded pickering emulsions stabilized by resistant starch nanoparticles using ultrasonication: Characterization, in vitro release and nutraceutical potential DOI: 10.1016/j.ultsonch.2022.105967 -
Oxygen heterocycle affidabilità 1,0
“LLM confirmed rule peak-group candidate”
Water Immersion Aging of Epoxy Resin and Fique Fabric Composites: Dynamic–Mechanical and Morphological Analysis DOI: 10.3390/polym14173650
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