What absorbs at 927 cm⁻¹ in an FTIR spectrum?
A band near 927 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 927 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 |
|---|---|---|---|
| Siloxane (Si-O-Si) | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Alkene (C=C) | 2 | 2 | 1.0 |
| Amine primary | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Ammonium | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Metal oxygen | 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.
Deunyddiau posibl
| Deunydd | Copaon ategol | Grwpiau sy＇n gorgyffwrdd | Ffynonellau a ddyfynnwyd |
|---|---|---|---|
| PMMA | 927, 1722, 1383 | C-O single bond | 1 |
| starch | 927, 1650, 1540 | C-O single bond | 1 |
| polypropylene | 927, 1030, 1600 | C-O single bond | 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 927 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
-
Hydroxyl (O-H) hyder 1.0
“might also be a characteristic of pyranose moiety, with multi-chain peaks related to sequential groups.[22]The cm-1 arrangement of hydroxyl peak at 927 corresponds to C-H out-of-plane A deformations of trans-disubstituted ethylene groupings”
Lee 等 - 2015 - ATR-FTIR and Spectrometric Methods for the Assay o DOI: 10.1080/10942912.2014.923911 -
Acetate hyder 1.0
“Pre-proof cm-1 The band at 927 was associated with stretching C-O in C-O-C group and vibration of α-1,4 glycosidic linkage [42], exhibiting the characteristic of the hydrophilic index of starch.”
Ratnaningsih 等 - 2020 - Physicochemical properties, in vitro starch digest DOI: 10.1016/j.ijbiomac.2019.09.092 -
Carbohydrate hyder 1.0
“While, the bands at 927 and 862 notcausedestructionofstarchcrystals.Thus,preservation are related to the vibration of the glucose molecule [45, of crystalline structure may occur due to the protective 46].”
Roa Acosta 等 - 2020 - Structural and thermal properties of the amaranth DOI: 10.1515/ijfe-2020-0024 -
hyder 1.0
“Tb3?-doped tributed particles of both vibrations of Si-O-Si bonds appear as a peak at 927 samples with sheetcm-1 The bands at 880-1020”
Structural and optical properties of green emitting Y2SiO5:Tb3+ and Gd2SiO5:Tb3+ nanoparticles for modern lighting applications DOI: 10.1007/s12598-020-01585-0 -
hyder 1.0
“cm-1, IR spectra of OPC and clinker, showing medium intense broad peaks at 927 and 931 respectively, might be occurred from asymmetric stretching vibrations of Si-O-Si in SiO4 tetrahedra Vibrational frequencies of studied samples and their”
Micro-characterization of Dust and Materials of Dust Origin at a Cement Industry Located in Bangladesh DOI: 10.4209/aaqr.220109 -
Ketone hyder 1.0
“group at 1277 and 1190 cm-1, the aromatic hydrogen in-plane deformation at 1155, 1215 and 1105 cm-1, and the aromatic hydrogen's out of plane bending modes occurred at 765, 860-841 cm-1 (broad band) and diphenyl ketone band at 927 cm-1.”
Mechano-Chemical Properties of Electron Beam Irradiated Polyetheretherketone DOI: 10.3390/polym14153067 -
Ammonium hyder 1.0
“At 334 °C, new peaks appearing at 927 cm-1 and 965 cm-1 are attributed to NH3 absorptions, illustrating the decomposition of APP.”
The Effects of a Macromolecular Charring Agent with Gas Phase and Condense Phase Synergistic Flame Retardant Capability on the Properties of PP/IFR Composites DOI: 10.3390/ma11010111 -
Alkene (C=C) hyder 0.9
“Explicit assignment: C=C bending in AESO.”
Ataei 等 - 2020 - Electrosprayed PMMA microcapsules containing green DOI: 10.1088/1361-665X/ab9754
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.