What absorbs at 806 cm⁻¹ in an FTIR spectrum?
A band near 806 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 806 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 | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Borate | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Metalloid oxygen | 1 | 1 | 0,8 |
| Carboxyl (COOH) | 1 | 1 | 0,7 |
| Hydrogen bond | 1 | 0 | 1,0 |
| Alkyl C-H | 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 |
|---|---|---|---|
| CuO | 806, 453, 1000 | Metal oxygen, C-O single bond | 1 |
| TiO | 806, 1730, 1699 | Metal oxygen, C-O single bond | 1 |
| kaolinite | 806, 3696, 693 | Silicon-oxygen (Si-O), Metal oxygen | 1 |
| DNA | 806, 1712, 1660 | 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 806 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
“1(b)) shows strong bands at 806 and 328 due to Nb-O”
Dwivedi 等 - 2014 - Down-shifting and upconversion photoluminescence i DOI: 10.1039/c4dt01864h -
Vertrauen 1,0
“Indeed, an IR band observed at 806 cm-1 is assigned to the Al-O bending mode of [AlO 6] octahedra [20-21].”
Souissi 等 - 2022 - Synthesis, Thermal Properties and Electrical Condu DOI: 10.21203/rs.3.rs-1294285/v1 -
N h Vertrauen 1,0
“Moreover, it is worth mentioning that F8815 has only primary amino groups as proved by the pair of peaks at 806 and 776 cm-1 cm-1 (NH bending, inset) [36], and the relative strong band at 1639 (NH stretching).”
Bellido-Aguilar 等 - 2019 - Effect of a fluoroalkyl-functional curing agent on DOI: 10.1016/j.surfcoat.2019.02.006 -
Ring structure Vertrauen 1,0
“3 899 J Mater Sci: Mater Electron (2023) 34:899 Page 5 of 15 Generally, the boroxol ring in the borate glass network is usually attributed to the IR absorption Absorbance 806cm(cid:2)1.”
Effect of CuO doping on structural features, optical absorption and photoluminescence behavior of ZnO-based glasses DOI: 10.1007/s10854-023-10270-8 -
C-O single bond Vertrauen 1,0
“cm-1 (COC,CCO and CCH deformation OH, C-H ring and side group vibrations), 871 cm-1 cm-1 cm-1 (glucosidic bond), 709 and 659 (C-OH out-of-plane and stretching), 806 bending) (Mizi et al., 2012).”
Iordache 等 - 2018 - FT-IR ANALYSIS OF FUSARIUM OXYSPORUM GROWN MYCO-CO DOI: 10.24264/icams-2018.VIII.8 -
Hydroxyl (O-H) Vertrauen 1,0
“Other minor changes (shifting/intensity bending at 806 cm-1 cm-1 variation) were also observed in AST at 1362 (in plane OH bend), 1208 (C-O stretching), cm-1 1508 and 1448 (C-C stretching (in ring)) [24].”
Astragalin from Cassia alata Induces DNA Adducts in Vitro and Repairable DNA Damage in the Yeast Saccharomyces cerevisiae DOI: 10.3390/ijms13032846 -
Siloxane (Si-O-Si) Vertrauen 1,0
“styreneSi-O-Si), Si-CH However, the analysis suggests that the material could be 3), 1101 (asymmetric stretching of 1068 (asymmetric Si-O-Si), Si-O-Si), stretching of 806 (symmetric stretching of 678 butadienerubber(SBR)becausesignalsofsuch”
Non-invasive identification of plastic materials in museum collections with portable FTIR reflectance spectroscopy: Reference database and practical applications DOI: 10.1016/j.microc.2015.07.016 -
C c single bond Vertrauen 1,0
“Band (cm-1) 806, 812, 813 806 C-C deformation and stretching vibration in mannans [45] - 827-831”
Study of Interactions between Titanium Dioxide Coating and Wood Cell Wall Ultrastructure DOI: 10.3390/nano12152678
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