What absorbs at 1148 cm⁻¹ in an FTIR spectrum?
A band near 1148 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
Schnelle Antwort
A band near 1148 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.
Mögliche Funktionsgruppenzuweisungen
| Funktionelle Gruppe | Unterstützende Fakten | Zitierte Quellen | Höchstes Vertrauen |
|---|---|---|---|
| Methoxy (OCH3) | 11 | 11 | 1,0 |
| Methacrylate | 11 | 11 | 1,0 |
| Acetate | 11 | 11 | 1,0 |
| C-O single bond | 11 | 11 | 1,0 |
| Carbohydrate | 4 | 4 | 1,0 |
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| C c single bond | 2 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Ammonium | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Sulfonyl | 1 | 1 | 0,9 |
Das Ranking spiegelt die gesammelte Literatur Evidenz wider, nicht eine einzelne maßgebliche Regel. Bestätigen Sie immer anhand Ihres Probenkontexts.
Mögliche Materialien
| Material | Unterstützende Peaks | Überlappende Gruppen | Zitierte Quellen |
|---|---|---|---|
| starch | 1148, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 3 |
| Epoxy | 1148, 1660, 1735 | Methacrylate, Acetate, C-O single bond | 1 |
| polyurethane | 1148, 2270, 1700 | Methacrylate, Acetate, C-O single bond | 1 |
| citric acid | 1148, 1725, 1732 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| epoxy resin | 1148, 905, 1100 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| alginate | 1148, 1100, 1715 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
Materialien werden nur angezeigt, wenn derselbe Literaturpool diese Bande und mindestens einen weiteren charakteristischen Peak unterstützt.
Spektrumslogik
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 1148 cm⁻¹ is usually not enough for material identification by itself.
Praktische Anwendung
Diese Art von Abfrage ist üblich bei der Polymeridentifikation, dem Screening unbekannter Kunststoffe, der Fehlersuche in der Qualitätskontrolle, der Verifizierung von Recyclingmaterial und der literaturgestützten Überprüfung der Peakzuordnung.
Häufige Fehler
- Behandlung einer isolierten Bande als Beweis für ein Material, ohne mindestens einen oder zwei unterstützende Peaks zu überprüfen.
- Überlappung ignorieren: Mehrere funktionelle Gruppen können nahe der gleichen Wellenzahl beitragen.
- Überspringen der Validierung, wenn Additive, Mischungen, Oxidation oder Verunreinigungen das Spektrum verfälschen können.
Beratung zur Verifizierung
Wenn weiterhin Mehrdeutigkeit besteht, validieren Sie die Hypothese mit DSC, GC-MS oder TGA, insbesondere bei Mischungen, degradierten Proben und gefüllten Polymeren.
Literatur hinter diesen Zuweisungen
-
Acetate Vertrauen 1,0
“Similar results regarding changes in pigeon pea starch, there were absorbance bands at 1148, 1076, and 991 cm(cid:0) 1 C-O granule morphology have been reported previously (Kuakpetoon and attributed to bond stretching.”
Effect of chemical treatments on the functional, morphological and rheological properties of starch isolated from pigeon pea (Cajanus cajan) DOI: 10.1016/j.crfs.2022.10.001 -
Acetate Vertrauen 1,0
“Corn starch extruded at 127 °C, 20% moisture content, and 8.8% of citric acid (CSE8) with RS formation 0.87 g/100 g, the adsorption bands at 1148 cm-1 and 1076 correspond to C-O, C-O-H or C-O-R stretching of saccharides, respectively.”
Optimization of an extrusion cooking process to increase formation of resistant starch from corn starch with addition of citric acid DOI: 10.1002/star.201900150. -
Acetate Vertrauen 1,0
“In the ether stretching region, the electrolytes show three main peaks attributed to cm-1, cm-1 cm-1 the C-O-C stretching of the starch backbone at around 1031 1079 and 1148 cm-1 (Fig.”
Ternary Natural Deep Eutectic Solvent (NADES) Infused Phthaloyl Starch as Cost Efficient Quasi-Solid Gel Polymer Electrolyte DOI: 10.1016/j.carbpol.2017.03.023 -
Vertrauen 1,0
“However, the absorption peak near 1148 corresponds to the S-O vibration 42 of SO (Ghosh and Handoo, 1980, Hughes et al., 1995, Mollah et al., 2000).”
FTIR study on early age hydration of carbon nanotubes modified cement-based materials DOI: 10.1680/jadcr.16.00167 -
Carbohydrate Vertrauen 1,0
“groups had shifted to 3205, 2827, and hemicellulose and cellulose peaks shifted to 1148 and However, 1739cm-1 1009cm-1.”
Thabede 等 - 2021 - Magnetite Functionalized Nigella Sativa Seeds for DOI: 10.1155/2021/6655227 -
C-O single bond Vertrauen 1,0
“LLM confirmed rule peak-group candidate”
Influence of Graphene Oxide Contents on Mechanical Behavior of Polyurethane Composites Fabricated with Different Diisocyanates DOI: 10.3390/polym -
Alkene (C=C) Vertrauen 1,0
“C=C stretching alkene 1148 C-N stretching amide 020012-6”
Boudebouz 等 - 2016 - Synthesis and Study of Glycoluril Derivatives DOI: 10.1063/1.4964534 -
Acetate Vertrauen 1,0
“1363 1363 1365 1365 1363 1367 1360 1363 δ(O-H) 1241 1239 1238 1231 1235 1240 1241 1242 or C-O anhydroglucose ring C-O stretch of C-O-H 1148 1147 1148 1149 1149 1149 1147 1147 in starch and C-O-C antisymmetric bridge 1077 1078 1077 1078 1078”
Potato Starch Utilization in Ecological Loose-Fill Packaging Materials—Sustainability and Characterization DOI: 10.3390/ma13061390
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