What absorbs at 1115 cm⁻¹ in an FTIR spectrum?
A band near 1115 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 1115 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 6 | 4 | 1,0 |
| Acetate | 5 | 5 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| C-O single bond | 4 | 4 | 1,0 |
| Alkyl C-H | 4 | 4 | 1,0 |
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Fatty acid | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
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 |
|---|---|---|---|
| plasma | 1115, 1656, 1650 | Methacrylate, Acetate | 1 |
| serum | 1115, 1656, 1122 | Methacrylate | 1 |
| lignin | 1115, 1035, 1510 | Methacrylate, Acetate, C-O single bond | 1 |
| wood | 1115, 1740, 1730 | Methacrylate, Acetate, C-O single bond | 1 |
| PET | 1115, 1408, 800 | Methacrylate, Acetate, C-O single bond | 1 |
| polymer | 1115, 1718, 1722 | Methacrylate, Acetate, C-O single bond | 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 1115 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
-
Acetate affidabilità 1,0
“Two regions, i.e., (1) between The characteristic peaks at 1115 and 1388 cm-1, 3600-3100 and (2) between 1,800 and 1,000 correspond to C-O-H stretching and C-H bending, cm-1 in the FTIR spectra are of particular interest.”
Hernandez-Vargas 等 - 2020 - Development and Characterization of Nanoparticles- DOI: 10.22207/JPAM.14.4.11 -
C c single bond affidabilità 1,0
“The peak assignments are: 1122 (C-C cm21 cm21 stretch), 1115 (C-C stretch), 1100 (Si-O cm21 stretch of clay), 1082 (Si-O stretch of clay and”
Loo 和 Gleason - 2004 - Investigation of polymer and nanoclay orientation DOI: 10.1016/j.polymer.2004.06.025 -
affidabilità 1,0
“acidophilus sources on BACs production by AA11 a peak at 1115 which is due to the strength of the Cshowed that the highest BACs' activity (12,246 AU/mL) O (Roach et al.”
Optimization of food-grade medium for co-production of bioactive substances by Lactobacillus acidophilus LA-5 for explaining pharmabiotic mechanisms of probiotic DOI: 10.1007/s13197-020-04894-5 -
Phosphate (PO4) affidabilità 1,0
“1115 cm-1 cm-1 (C=N (symmetric stretching P-O-C), 1034 (collagen), 1528 guanine, adenine, cytosine) and cm-1 (C=O 1759 ester group vibration of triglycerides).”
New approach to investigate Common Variable Immunodeficiency patients using spectrochemical analysis of blood DOI: 10.1038/s41598-019-43196-5 -
affidabilità 1,0
“two peaks at 1115 and 1043 These two last peaks, along cm-1, with the band at 591 can be ascribed to S-O stretches and bending vibrations in schwertmannite (Fe 8O 8(OH) 6SO 4), a hydroxysulfate mineral, commonly found in ocher cm-1 deposits”
Assessment of Easily Accessible Spectroscopic Techniques Coupled with Multivariate Analysis for the Qualitative Characterization and Differentiation of Earth Pigments of Various Provenance DOI: 10.3390/min12060755 -
affidabilità 1,0
“cm-1 - the appearance of new bands from 1115 (of high intensity) and 537 were assigned to silica and other oxides from FA, as seen in Figure 3.”
The Influence of Fly Ash on the Mechanical Properties of Water Immersed All Waste Composites DOI: 10.3390/polym14101957 -
Silicon (Si) affidabilità 1,0
“253 cm-1, cm-1 For the region below 1200 bands at 1115 and 1042 were related to Si-O 254 cm-1 stretching, and bands at 915-847 were due to AlMOH deformation (M = Al, Fe or Mg) 255”
Franca 等 - 2020 - Monitoring diclofenac adsorption by organophilic a DOI: 10.1016/j.envpol.2013.04.012 -
Acetate affidabilità 1,0
“3122.3w grindingandethyl Raman - - - 1671.7 m - 1284.0 s addition, bands observed at 1170, 1150 and 1134 cm-1 in the spectra of physical mixture are shifted to acetate Raman - - - 1671.7m - 1284.0s 3196.3 m lower values at ~1161, 1146 and 1”
Garbacz 等 - 2020 - Structural Characterization of Co-Crystals of Chlo DOI: 10.3390/pharmaceutics12070648
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