What absorbs at 948 cm⁻¹ in an FTIR spectrum?
A band near 948 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
Ateb cyflym
A band near 948 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.
Aseiniadau grŵp swyddogaethol posibl
| Grŵp swyddogaethol | Ffeithiau ategol | Ffynonellau a ddyfynnwyd | Hyder uchaf |
|---|---|---|---|
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Silanol (Si-OH) | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 0 | 1.0 |
Mae＇r safle＇n adlewyrchu tystiolaeth llenyddiaeth gronnwyd, nid rheol awdurdodol sengl. Cadarnhewch bob amser yn erbyn eich cyd-destun sampl.
Rhesymeg sbectrwm
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 948 cm⁻¹ is usually not enough for material identification by itself.
Defnydd yn y byd go iawn
Mae＇r math hwn o ymholiad yn gyffredin mewn adnabod polymer, sgrinio plastig anhysbys, datrys problemau QC, dilysu deunydd wedi＇i ailgylchu, ac adolygiad o aseiniad copa wedi＇i gefnogi gan lenyddiaeth.
Camgymeriadau cyffredin
- Trin un band ynysig fel prawf o ddeunydd heb wirio o leiaf un neu ddau gopa cefnogol.
- Anwybyddu gorgyffwrdd: gall grwpiau swyddogaethol lluosog gyfrannu ger yr un rhif ton.
- Hepgor dilysu pan fo ychwanegion, cymysgeddau, ocsideiddio, neu halogiad yn gallu ystumio＇r sbectrwm.
Cyngor dilysu
Pan fo amwysedd yn parhau, dilyswch y rhagdybiaeth gyda DSC, GC-MS, neu TGA, yn enwedig ar gyfer cymysgeddau, samplau dirywiedig, a pholymerau llawn.
Llenyddiaeth y tu ôl i＇r aseiniadau hyn
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Silanol (Si-OH) hyder 1.0
“2020;48 cm-1, vibration of Si-OH appeared at 948 and the anti- (12):64-71+80.”
Qin 等 - 2023 - Preparation and properties of silica solmelamine DOI: 10.1080/15685551.2022.2162280 -
Metal oxygen hyder 1.0
“Hence, the relative intensity of TiOH(948cm-1),Ti-O-Ti band(485cm-1)”
Wan 等 - 2006 - Structure and thermal properties of titanium dioxi DOI: 10.1007/s00289-006-0506-6 -
Silicon (Si) hyder 1.0
“metric and symmetric stretching of Si-O-Si at 1080 with a shoulder at 1200 In cm-1, addition, we can see the bending vibrations of Si-O-Si at 800 and 460 whereas the cm-1 cm-1 band at 948 is assigned to Si-OH bond vibrations.”
Antibacterial Activity and Iron Release of Organic-Inorganic Hybrid Biomaterials Synthesized via the Sol-Gel Route DOI: 10.3390/app11199311 -
Acetate hyder 1.0
“It was observed that C-O-Cstretching 948 etal.,(2021) thecolouredricehadhigherpeakintensitycomparedtothatofthewhite C-Cstretching 881,815 Maetal.,(2018) rice.”
New insight into the pigmented rice of northeast India revealed high antioxidant and mineral compositions for better human health DOI: 10.1016/j.heliyon.2022.e10464 -
Acetate hyder 1.0
“spectrum of the Por-BZ monomer, with the main characteristic signals being those for the cm-1), cm-1), oxazine ring (948 C-O stretching (1222 and N-H stretching of the pyrrole cm-1), 1H 13C units (3319 indicative of the BZ ring having forme”
Zhang 等 - 2022 - Metal Complexes of the Porphyrin-Functionalized Po DOI: 10.3390/polym14030449 -
hyder 0.8
“Peak at 948 cm-1 indicates vibrational mode of PO4^3-.”
Synthesis and structural characterization of samarium doped calcium zinc phosphate nanophosphors DOI: 10.1063/1.5047964
Oes gennych sbectrwm gyda＇r band hwn?
Llwythwch eich sbectrwm FTIR i fyny a chael adroddiad dehongli llawn — aseiniadau brig gyda chyfeiriadau llenyddiaeth, cyfateb llyfrgell, a chadwyn dystiolaeth â gradd hyder — mewn eiliadau.