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
Ātra atbilde
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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| 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 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Iespējamie materiāli
Materiāli tiek parādīti tikai tad, ja šo joslu un vismaz vienu papildu raksturīgo pīķi atbalsta tā pati literatūras kopa.
Spektra loģika
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.
Reālās pasaules izmantošana
Šāda veida vaicājums ir izplatīts polimēru identificēšanā, nezināmas plastmasas skrīningā, kvalitātes kontroles problēmu risināšanā, pārstrādāto materiālu pārbaudē un ar literatūru pamatotā pīķu piešķīruma pārskatā.
Biežākās kļūdas
- Vienas izolētas joslas uzskatīšana par materiāla pierādījumu, nepārbaudot vismaz vienu vai divus atbalsta pīķus.
- Ignorējot pārklāšanos: vairākas funkcionālās grupas var dot ieguldījumu tuvu tam pašam viļņa skaitlim.
- Izlaist validāciju, ja piedevas, maisījumi, oksidācija vai piesārņojums var izkropļot spektru.
Verifikācijas padoms
Ja joprojām pastāv neskaidrība, apstipriniet hipotēzi ar DSC, GC-MS vai TGA, īpaši maisījumiem, noārdītiem paraugiem un pildītiem polimēriem.
Literatūra aiz šiem piešķīrumiem
-
Silicon (Si) pārliecība 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 -
pārliecība 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 pārliecība 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) pārliecība 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) pārliecība 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 -
pārliecība 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 pārliecība 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 pārliecība 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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