What absorbs at 662 cm⁻¹ in an FTIR spectrum?
A band near 662 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 662 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 |
|---|---|---|---|
| C-O single bond | 3 | 3 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 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 |
|---|---|---|---|
| cellulose | 662, 1735, 1650 | Methacrylate, C-O single bond, Methoxy (OCH3) | 1 |
| collagen | 662, 1408, 1660 | Methacrylate, Methoxy (OCH3), C-O single bond | 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 662 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
-
Metal oxygen Vertrauen 1,0
“FTIR spectrum cm(cid:1)1 of SnQ shows band at 662 and a strong one at 564 which are Sn-O Sn-OH due to stretching and respectively [39,40].”
Shajira 等 - 2015 - Sunlight assisted photodegradation by tin oxide qu DOI: 10.1016/j.jpcs.2015.09.003 -
Amide Vertrauen 1,0
“(ii) the band at 662 assigned to the combination of stability.38 chemical behavior and In particular, NaBF was used ν(C-N) and δ ring modes;”
Dani 等 - 2015 - Design of high surface area poly(ionic liquid)s to DOI: 10.1039/c5ta00272a -
C-O single bond Vertrauen 1,0
“The band approximately at 662cm-1 mately at referred to the C-OH of plane bending mode.”
Investigate the role of fungal communities associated with a historical manuscript from the 17th century in biodegradation DOI: 10.1038/s41529-022-00296-4 -
Aromatic ring Vertrauen 1,0
“The band around 662 cm-1 may be assigned to the -CHbonding of aromatic groups [32].”
Impact and Tensile Properties of Polyester Nanocomposites Reinforced with Conifer Fiber Cellulose Nanocrystal:A Previous Study Extension DOI: 10.3390/polym13111878 -
C-O single bond Vertrauen 1,0
“The little peaks at approximately 662 C-OH bending (Fan et al.”
Chemical functional groups of extractives, cellulose and lignin extracted from native Leucaena leucocephala bark DOI: 10.1007/s00226-020-01258-2 -
Acetate Vertrauen 1,0
“sorption, the weak peaks at wavenumber 662 cm-1 (the expected bond is O 1CO 2), after CO 2 cm-1 cm-1 C-O+C···O), strong peaks at wavenumber 1007 (the expected bond is 1402 (the and 840 cm-1 (the expected bond is CO 3) are attributed to carb”
CO2 Sorption and Regeneration Properties of K2CO3/Al2O3-Based Sorbent at High Pressure and Moderate Temperature DOI: 10.3390/app12062989 -
Phosphate (PO4) Vertrauen 1,0
“In the spectrum of BG: P-O wagging is centered at 456 and P-O scissoring is centered at 662 cm-1 cm-1.”
Molecular and biological activities of metal oxide-modified bioactive glass DOI: 10.1038/s41598-023-37017-z -
Vertrauen 0,9
“Explicit assignment: 'and to maghemite (662 cm-1)'”
Desferrioxamine B: Investigating the Efficacy of Hydrogels and Ethanol Gels for Removing Akaganeite and Maghemite from Dry Wooden Substrates DOI: 10.3390/f14020247
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