What absorbs at 472 cm⁻¹ in an FTIR spectrum?
A band near 472 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 472 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 4 | 3 | 1,0 |
| Phosphate (PO4) | 3 | 3 | 1,0 |
| Silicon (Si) | 3 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| S s | 1 | 1 | 1,0 |
| Silicate | 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 |
| Amide | 1 | 0 | 1,0 |
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 |
|---|---|---|---|
| chitosan | 472, 1650, 1655 | Alkyl C-H | 1 |
| pectin | 472, 1746, 1150 | Alkyl C-H | 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 472 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
-
Vertrauen 1,0
“Si-O-Si symmetric vibration Si-O-Si 472 471 Si-O-Si bending vibration unmodified surface-modified Table 5: DLS of the and silica”
Ganie 等 - 2020 - Synthesis and Characterization of a New Surface-Mo DOI: 10.1155/2020/8814260 -
Acetate Vertrauen 1,0
“A (cm-1) 472 and stretching vibration of Stretching vibration of methyl group (-CH) at ~2930 (cm-1) M 473 carboxyl (C-O-C) group at ~1030 and ~1250 were also observed.”
Evaluation of structural integrity and functionality of commercial pectin based edible films incorporated with corn flour, beetroot, orange peel, muesli and rice flour DOI: 10.1016/j.foodhyd.2019.01.022 -
Silicon (Si) Vertrauen 1,0
“cm-1 observed at 472 was due to the stretching vibration of gel was suction filtered, washed thoroughly with distilled cm-1 the Si-O-Si bond.”
Adam 等 - 2012 - Liquid Phase Oxidation of Acetophenone over Rice H DOI: 10.1016/S1872-2067(11)60361-6 -
Phosphate (PO4) Vertrauen 1,0
“cm-1 PO43originate from ions, The bands located at 472.474, 568.798, 601.682, 1039.44 and 1091.51 and are weaker than the strong P-O stretching vibration due to HA stoichiometry.”
Evaluation Of Mechanical and Biocompatibility Properties of Hydroxyapatite/Manganese Dioxide Nanocomposite Scaffolds for Bone Tissue Engineering Application DOI: 10.1016/B978-0-12-816909-4.00008-7 -
Silicate Vertrauen 1,0
“The vibration band appearing at 472 cm-1 is assigned to deformation vibrations of silicate tetrahedrons, ν4 (O-Si-O), which becomes better defined after the heat treatment of OxGC (red plot).”
Novel Sol-Gel Route to Prepare Eu3+-Doped 80SiO2-20NaGdF4 Oxyfluoride Glass-Ceramic for Photonic Device Applications DOI: 10.3390/nano13050940 -
Alkyl C-H Vertrauen 1,0
“and Acetic 19◦ Ch XRD analysis revealed sharper peaks at (471.59 counts/s and 415.96 counts/s, Lactic”
Physicochemical Properties and Functional Characteristics of Ecologically Extracted Shrimp Chitosans with Different Organic Acids during Demineralization Step DOI: 10.3390/molecules27238285 -
Vertrauen 1,0
“presence of iron-based and lead-based pigments, whereas in sample 4 the SEM-EDS results led us to Sample 1, whose main bands stand at 1032, 1007, 532 and 472 cm-1 (Figure 4a), shows the features think that it was basically composed of iron”
Pigments on Roman Wall Painting and Stucco Fragments from the Monte d’Oro Area (Rome): A Multi-Technique Approach DOI: 10.3390/app10207121 -
Silicon-oxygen (Si-O) Vertrauen 1,0
“Explicit assignment: band at 472 per cm related to Si-O-Al.”
Desulfurization of liquid fuels using aluminum modified mesoporous adsorbent: towards experimental and kinetic investigations DOI: 10.1038/s41598-021-88439-6
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