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
Risposta rapida
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.
Possibili assegnazioni di gruppi funzionali
| Gruppo funzionale | Fatti di supporto | Fonti citate | Affidabilità massima |
|---|---|---|---|
| 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 |
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 |
|---|---|---|---|
| chitosan | 472, 1650, 1655 | Alkyl C-H | 1 |
| pectin | 472, 1746, 1150 | Alkyl C-H | 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 472 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
-
affidabilità 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 affidabilità 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) affidabilità 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) affidabilità 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 affidabilità 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 affidabilità 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 -
affidabilità 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) affidabilità 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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