What absorbs at 636 cm⁻¹ in an FTIR spectrum?
A band near 636 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
Ateb cyflym
A band near 636 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 |
|---|---|---|---|
| Metal oxygen | 2 | 2 | 1.0 |
| Sulfonate | 1 | 1 | 1.0 |
| Fluorine (C-F) | 1 | 1 | 1.0 |
| Chlorine | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 0.7 |
| C c single bond | 1 | 1 | 0.7 |
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 |
|---|---|---|---|
| PVC | 636, 834, 1195 | Chlorine | 1 |
| Fe3O4 | 636, 2358, 1673 | Metal oxygen | 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 636 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
“additional Raman bands of C-Cl vibrations in the lower wavenumber region at 636 and 695 The bands cm-1 cm-1 around 1302 and 1437 were assigned to the methylene groups.”
Optical photothermal infrared spectroscopy with simultaneously acquired Raman spectroscopy for two-dimensional microplastic identification DOI: 10.1038/s41598-022-23318-2 -
Fluorine (C-F) hyder 1.0
“Minor bands at 636 and cm(cid:5)1 553 were observed and are assigned to the CF2 wagging and CF2 deformation modes, respectively.”
In vitro mineralisation of grafted ePTFE membranes carrying carboxylate groups DOI: 10.1016/j.bioactmat.2017.02.002 -
Metal oxygen hyder 1.0
“The region at 1107 9 cm1 is attributed to the absorption peak at 1467 antisymmetric stretching vibrations of the BO group, 3 m1 m1 and 484 are ascribed to the vibrations and 636 of the AlO polyhedral and lattice vibrations contained x 2θ”
Wang 等 - 2015 - A facile method to fabricate Al4B2O9 whiskers on p DOI: 10.1007/s40145-015-0154-0 -
Sulfonate hyder 1.0
“2 for the region between 1800 to 600 The band 636 attributed to of BMIMCF 2 3 0 2 3 symmetric deformation of the salt remained unshifted as concentration of BMIMCF 3SO added is increased SO 3 3”
Zulkepeli 等 - 2017 - Infrared Studies of PVC-based Electrolytes Incorpo DOI: 10.1063/1.4999880 -
Metal oxygen hyder 0.9
“band shift from 636.27 to 587.25 on MmGO”
Adsorptive and photocatalytic activity of Fe3O4-functionalized multilayer graphene oxide in the treatment of industrial textile wastewater DOI: 10.1007/s11356-020-10926-6 -
C c single bond hyder 0.7
“Text: 'The peaks at 636, cm¡1' followed by 'C-C bending modes of adsorbed water and stretching vibration'.”
Synthesized and magnetic and ferroelectric phase transitions of single phase multiferroic YMn2O5 nanoparticles through microwave assisted polyacrylamide gel method DOI: 10.1080/00150193.2017.1375302 -
hyder 0.7
“Raman mode Eg of anatase.”
Zhao 和 Tay - 2006 - Study of nanocrystal TiO2 thin films by thermal an DOI: 10.1007/s10832-006-9903-3
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.