What absorbs at 801 cm⁻¹ in an FTIR spectrum?
A band near 801 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 801 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 6 | 6 | 1,0 |
| Alkyl C-H | 4 | 4 | 1,0 |
| Siloxane (Si-O-Si) | 4 | 4 | 1,0 |
| Silicon (Si) | 3 | 3 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Alkene (C=C) | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 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 |
|---|---|---|---|
| cellulose | 801, 1735, 1650 | Alkyl C-H | 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 801 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
-
Silicon (Si) tillid 1,0
“In addition, BSNs showed a band at cm-1, 801 About 50,000 human colon cancer cells were seeded in each which was assigned to the symmetric stretching Si-O-Si vibration of [29].”
Fabrication of Biogenic Silica Nanostructures from Sorghum bicolor Leaves for Food Industry Applications DOI: 10.1007/s12633-020-00379-4 -
tillid 1,0
“by cm-1 Si-O symmetrical stretching vibration to 801 value of wavenumber and Si-O”
Huseynov 等 - 2018 - Fourier transform infrared spectroscopic study of DOI: 10.1142/S0217979218500741 -
Aromatic ring tillid 1,0
“The benzene ring's =C-H bending vibration absorption peaks and benzene ring framework 886cm-1, 823cm-1 801cm-1.”
Li 等 - 2011 - The detection of Cypermethrin on the surface of Ap DOI: 10.4028/www.scientific.net/AMR.287-290.2991 -
Silicon-oxygen (Si-O) tillid 1,0
“After reaction with SiO 2, the hybrid cm-1, cm-1, materials SiO 2/DAC exhibited new characteristic peaks located at 1067, 795 and 468 as well as SiO 2/DAC exhibited new characteristic peaks located at 1067, 795 and 468 as well as 1060, 801”
Ding 等 - 2018 - The Preparation of Nano-SiO2Dialdehyde Cellulose DOI: 10.3390/polym10050550 -
Silicon (Si) tillid 1,0
“Furthermore, the spectra of the samples cm-1, modified with polysiloxanes contain bands at 801 and 1260 originating from Si-O-Si symmetric stretching vibrations and the Si-O-C stretching vibration shoulder, respectively.”
Gieparda 等 - 2023 - Polysiloxanes and Silanes with Various Functional DOI: 10.3390/ma16103839 -
tillid 1,0
“ESI-MS molecular-ion peak 801.26, corresponding to H+ + 1H [Zn(L2) ].”
Gusev 等 - 2020 - Synthesis, Photoluminescence and Electrical Study DOI: 10.3390/ma13245698 -
C c single bond tillid 1,0
“There are also bands at 801 cm-1 can be assigned to vibrations of C-C bonds in the pyrrole ring.”
Sodium Copper Chlorophyllin Immobilization onto Hippospongia communis Marine Demosponge Skeleton and Its Antibacterial Activity DOI: 10.3390/ijms17101564 -
Metal oxygen tillid 1,0
“The band at 619 cm-1 is attributed to W-O stretching vibration, while bands cm-1 801 and 762 are attributed to the inter-bridge stretching O-W-O and the corner-sharing mode at 801 and 762 cm-1 are attributed to the inter-bridge stretching O”
Petruleviciene 等 - 2020 - Tuning the Photo-Luminescence Properties of WO(3)L DOI: 10.3390/ma13122814
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