What absorbs at 516 cm⁻¹ in an FTIR spectrum?
A band near 516 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 516 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 | 5 | 5 | 1.0 |
| Silicon-oxygen (Si-O) | 4 | 4 | 1.0 |
| Silicon (Si) | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Metal hydroxyl | 1 | 1 | 1.0 |
| Metal oxo | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Chlorine | 1 | 1 | 1.0 |
| Amide | 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 |
|---|---|---|---|
| cellulose | 516, 1735, 1650 | Hydroxyl (O-H) | 1 |
| hemicellulose | 516, 1730, 897 | Hydroxyl (O-H) | 1 |
| iron oxide | 516, 1130, 891 | Metal oxygen, Hydroxyl (O-H) | 1 |
| GO | 516, 1720, 1182 | Hydroxyl (O-H) | 1 |
| rGO | 516, 2358, 2930 | Hydroxyl (O-H) | 1 |
| PCL | 516, 1751, 1724 | Hydroxyl (O-H) | 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 516 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
“stretching alkylhalide(halocompound) stretching 780.86 strong C-Cl alkylhalide(halocompound) stretching 516.39 strong C-I 2.4.”
Phytochemical Composition of Combretum molle (R. Br. ex G. Don.) Engl. & Diels Leaf and Stem Extracts DOI: 10.3390/plants12081702 -
Silicon (Si) hyder 1.0
“Bands at516 and assigned toAl-Oconcentration in the supernatant solution during the adsorption process Si and Si-O-Si bending vibrations, respectively (Chieng et al., 2010;”
Sodium montmorillonite/ureasil-poly(oxyethylene) nanocomposite as potential adsorbent of cationic dye DOI: 10.1016/j.clay.2017.11.009 -
Metal oxygen hyder 1.0
“Figure 1(a) showed the first weight loss up to 516cm-1 320∘ [11], and the V-O-V V symmetric stretch around C with a large endotherm, associated with the volatiliza756cm-1 asymmetric stretch at [12].”
Gokdemir 等 - 2014 - Structural Modification of Sol-Gel Synthesized V2O DOI: 10.1155/2014/795384 -
Silicon-oxygen (Si-O) hyder 1.0
“LLM confirmed rule peak-group candidate”
The physicochemical and biomechanical profile of forsterite and its osteogenic potential of mesenchymal stromal cells DOI: 10.1371/journal. -
hyder 1.0
“Notably, prominent vibrations at 516, 510, and 509 correspond to Fe-O-As ligand vibrations [43].”
Morales-Mendoza 等 - 2023 - Effect of Micro-Nanobubbles on Arsenic Removal by DOI: 10.3390/jof9080857 -
hyder 1.0
“The two peaks at 516 and 462 correspond to stretching vibration of the Al-O and”
Influence of montmorillonite/carbon nanotube hybrid nanofillers on the properties of poly(lactic acid) DOI: 10.1016/j.clay.2020.105925 -
hyder 1.0
“516cm-1 shows the presence of Al-OH bond.”
Tsekpo 等 - 2023 - Fabrication, Properties, and Performance of Polyme DOI: 10.1155/2023/5683415 -
Silicon (Si) hyder 1.0
“the peak at 516 cm-1 was caused by the Si-O-Fe stretching vibrations whilst the peaks at 638 cm-1 and at 838 cm-1 were due to Si-O stretching vibrations and Si-O-Al stretching vibrations, respectively.”
Investigation on the Painting Materials and Profile Structures Used in Ancient Chinese Folk Architectural Paintings by Multiple Analytical Methods DOI: 10.3390/coatings12030320
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.