What absorbs at 933 cm⁻¹ in an FTIR spectrum?
A band near 933 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
Ateb cyflym
A band near 933 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) | 4 | 4 | 1.0 |
| Methacrylate | 4 | 4 | 1.0 |
| Acetate | 4 | 4 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| C-O single bond | 3 | 3 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Silanol (Si-OH) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Borate | 1 | 1 | 1.0 |
| Nucleic acid | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
Mae＇r safle＇n adlewyrchu tystiolaeth llenyddiaeth gronnwyd, nid rheol awdurdodol sengl. Cadarnhewch bob amser yn erbyn eich cyd-destun sampl.
Deunyddiau posibl
| Deunydd | Copaon ategol | Grwpiau sy＇n gorgyffwrdd | Ffynonellau a ddyfynnwyd |
|---|---|---|---|
| Silica | 933, 1100, 1080 | Alkyl C-H, Methacrylate, Acetate | 1 |
| Polypropylene | 933, 1030, 1600 | Alkyl C-H, Methacrylate, Acetate | 1 |
Mae deunyddiau＇n cael eu dangos dim ond pan fydd yr un gronfa lenyddiaeth yn cefnogi＇r band hwn ac o leiaf un brig nodweddiadol ychwanegol.
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 933 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
-
hyder 1.0
“It is possible that the new peak of 933.03 eV may be due to Cu (I) species, while the energy band of 935.23 eV could be assumed to be due to Cu”
Ibrahim 等 - 2022 - Effect of Ammonium Sulfide on Sulfidization Flotat DOI: 10.3390/min12101193 -
C c single bond hyder 1.0
“At the length of the wavenumber of 933 another peak also appears, appears, indicating the presence of a C-C bond group.”
Glass Powder Additive on Recycled Polypropylene Filaments: A Sustainable Material in 3D Printing DOI: 10.3390/polym14010005 -
C c single bond hyder 1.0
“The films (C-C in melting temperature is higher for drawn at a higher bands at 933 and 947 (CH rocking);”
Vasanthan 和 Manne - 2013 - Strain-Induced Crystallization and Conformational DOI: 10.1021/ie401783y -
Phosphate (PO4) hyder 1.0
“cm-1, assignments of the phosphate related peaks are as follows: P-O stretching at 776 P-O-C cm-1, cm-1, cmsymmetric stretching at 933 P-O-C assymetric stretching at 1050 P=O at 1240 1.”
An appraisal of the thermal decomposition mechanisms of ILs as potential lubricants DOI: 10.1002/ls.1457 -
Carbohydrate hyder 1.0
“cm-1 (1) Band at 933 (assigned to carbohydrates) is specific for Col fungi (Fig.”
Erukhimovitch 等 - 2010 - Direct identification of potato's fungal phyto-pat DOI: 10.3233/SPE-2010-0483 -
Silicon (Si) hyder 1.0
“XPS A strong peak at 932.54 eV by Cu2p 3/2 EDAX The spectrum revealed the presence of elements like C, N, O, Si and Cu.”
Gupta 等 - 2015 - Silica functionalized Cu(II) catalysed selective o DOI: 10.1007/s12039-015-0902-2 -
Acetate hyder 1.0
“cm-1 cm-1 were observed at 1076 (C-O, axial deformation), 933 cm-1 (characteristic of 3, 6-anhydrogalactose) and 889 (attributed to Fourier transform infrared spectroscopy carbon)[16].”
Hu 等 - 2012 - Preparation of Berbamine Loaded Chitosan-agarose M DOI: 10.1590/S0104-14282012005000073 -
Acetate hyder 1.0
“Firstly in HeLa cells, the band at 933 was assigned to the vibrational mode of the C-O-C ring of deoxyribose in Z-form DNA (Banyay et al., 2003;”
Le Roux 等 - 2015 - Fourier Transform Infrared spectroscopy discloses DOI: 10.1016/S0301-4622
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.