What absorbs at 761 cm⁻¹ in an FTIR spectrum?
A band near 761 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 6 cited sources
Mabilis na sagot
A band near 761 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 | 3 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
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 |
|---|---|---|---|
| PANI | 761, 2930, 1300 | Ring structure | 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 761 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
-
Metal oxygen kumpiyansa 1.0
“The strong peak at 761 is due to the stretching frequency of V-O band in cm-1 YVO 4[17].”
Rajendra 等 - 2018 - Luminescence properties of dysprosium doped YVO4 p DOI: 10.1016/j.jre.2018.07.001 -
Aromatic ring kumpiyansa 1.0
“The characteristic bands of vitamin A were the aromatic ring vibration at 761 cm-1, =C-H, and the C=C Figure 7a shows the Raman spectrum for a 10% STS solution in water for the spectral range vibrations for the aromatic ring.”
Spectroscopic Characterization of Emulsions Generated with a New Laser-Assisted Device DOI: 10.3390/molecules25071729 -
Metal oxygen kumpiyansa 1.0
“3 cm-1 and the distinctive bands at 823 932, 823 and 761 cm-1 and 761 are recognized as the W-O-W stretching [41].”
He 等 - 2020 - Flexible fabric gas sensors based on PANIWO(3)p-n DOI: 10.1007/s40843-020-1364-4 -
Silicon (Si) kumpiyansa 1.0
“cm-1 cm-1, Peaks of Si-O-T asymmetric and symmetric stretching of BA appear at 1089 and 761 Peaks of Si-O-T asymmetric and symmetric stretching of BA appear at 1089 cm-1 and 761 cm-1, respectively.”
Licciulli 等 - 2020 - Thermally Aerated Geopolymers as Lightweight Const DOI: 10.3390/app10196697 -
N-O bond kumpiyansa 1.0
“(𝜈 cm-1 cm-1 cm-1 2) The IR bands at 708.47 and 761.38 𝑠NO and at 910.98 (ring stretching bands) are 𝛾-HMX.Thepeaksat713.88 (𝜈 cm-1,761.19 cm-1 cm-1 2) characteristicof 𝑠NO and1031 (ringstretching 𝛼-HMX.”
Thakur 等 - 2022 - SUPERCRITICAL ANTISOLVENT METHOD FOR RECRYSTALLIZA DOI: 10.24425/cpe.2022.140819 -
kumpiyansa 0.9
“Explicit assignment: 'peak at 761 (S-Au)'”
Svorcik 等 - 2011 - Soft and rigid dithiols and Au nanoparticles gra DOI: 10.1186/1556-276X-6-607
May spectrum ka ba na may ganitong band?
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