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
Hurtigt svar
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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 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 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| 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 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
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.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
Metal oxygen tillid 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 -
tillid 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 tillid 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 tillid 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 tillid 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) tillid 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) tillid 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 tillid 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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