What absorbs at 982 cm⁻¹ in an FTIR spectrum?
A band near 982 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 7 cited sources
Mabilis na sagot
A band near 982 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.
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| Metal oxygen | 3 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 0.5 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Mga posibleng materyales
| Materyal | Sumusuportang mga peak | Mga overlapping na grupo | Mga nasiping sanggunian |
|---|---|---|---|
| geopolymer | 982, 1453, 1000 | Metal oxygen, Alkyl C-H | 1 |
| Silver Nanoparticles | 982, 1636, 1631 | Alkyl C-H, Methoxy (OCH3) | 1 |
| TiO2 | 982, 1700, 1093 | Metal oxygen, Alkyl C-H, Methoxy (OCH3) | 1 |
Ang mga materyales ay ipinapakita lamang kapag ang parehong literatura pool ay sumusuporta sa banda na ito at hindi bababa sa isang karagdagang katangian na tuktok.
Logic ng spectrum
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 982 cm⁻¹ is usually not enough for material identification by itself.
Paggamit sa totoong mundo
Ang uri ng query na ito ay karaniwan sa pagtukoy ng polymer, screening ng hindi kilalang plastic, pag-troubleshoot ng QC, pag-verify ng recycled na materyal, at pagsusuri ng pagtatalaga ng peak na may suporta ng literatura.
Mga karaniwang pagkakamali
- Pagtrato sa isang nakahiwalay na banda bilang patunay ng isang materyal nang hindi sinusuri ang hindi bababa sa isa o dalawang sumusuportang peak.
- Hindi pinapansin ang overlap: maraming functional group ang maaaring mag-ambag malapit sa parehong wavenumber.
- Pag-laktaw sa pagpapatunay kapag ang mga additives, blends, oxidation, o contamination ay maaaring mag-distort ng spectrum.
Payo sa pagpapatunay
Kapag nananatili ang kalabuan, patunayan ang hypothesis gamit ang DSC, GC-MS, o TGA, lalo na para sa mga blend, degraded na sample, at filled polymers.
Literatura sa likod ng mga pagtatalagang ito
-
N-O bond kumpiyansa 1.0
“level understanding of the thermomechanical properties of a cm-1, No corresponding shift was observed for the peak at 982 broader range of polymer materials in nano-thin regime.”
Kollath 和 Karan - 2016 - New molecular scale insights into the alpha-transi DOI: 10.1039/C6CP04457C. -
Phosphate (PO4) kumpiyansa 1.0
“XRD patterns show the presence of peaks at = 982, and 892 ascribed to (P-O), (W-O) and”
Visible light absorption of TiO2 materials impregnated with tungstophosphoric acid ethanol–aqueous solution at different pH values. Evidence about the formation of a surface complex between Keggin anion and TiO2 surfaces DOI: 10.1016/j.materresbull.2013.09.043 -
kumpiyansa 1.0
“cm-1 cm-1, 1605 and 3383-3601 being assigned to the vibrational modes of the deformation IR bands of PTA situated at 523 cm-1, 594 cm-1, 797 cm-1, 891 cm-1, 982 cm-1, 1080 cm-1, 1605 (O corresponds to corner oxygen atoms), W-O e-W stretchin”
The Photoluminescence and Vibrational Properties of Black Phosphorous Sheets Chemically/Electrochemically Functionalized in the Presence of Diphenylamine DOI: 10.3390/polym14214479 -
Alkyl C-H kumpiyansa 1.0
“aromatic group in strong (C-H bend stretch, aliphatic amines group in medium (C-N stretch, 1055.96, 1038.12cm-1), alkenes group in strong (C-H rock, 981.81, 726.78cm-1), and alkyl halides group in medium (C-Br 567.83cm-1).”
Baranitharan 等 - 2022 - Fabrication of Silver Nanoparticles Using Fimbrist DOI: 10.1155/2022/4083663 -
Alkyl C-H kumpiyansa 1.0
“(8) cm´1 cm´1 In Figure 4 the peaks obtained in FTIR at 982 and 1345 are assigned to C-H bending cm´1 and C-O-C symmetrical stretching vibrations, while the peak observed at 1585 originates ʋ where c is speed of light, is vibrational freque”
Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures DOI: 10.3390/nano6040073 -
kumpiyansa 0.9
“Explicit assignment: 'absorption peak corresponding to Keggin-type HPW emerge 982cm-1, 889cm-1, 801cm-1'”
Zhang 等 - 2021 - Bimetallic MOF-Derived Synthesis of Cobalt-Cerium DOI: 10.1155/2021/2131960 -
Siloxane (Si-O-Si) kumpiyansa 0.5
“Explicit assignment in text: '798cm-1 was the Si-O-Si' but 982 not explicitly assigned; however context suggests Si-O-Si related.”
Preparation and Characterization of Manganese Slag and Fly Ash-based Geopolymer DOI: 10.1051/matecconf/201713004006
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