What absorbs at 479 cm⁻¹ in an FTIR spectrum?
A band near 479 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 479 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 | 3 | 3 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Carbon dioxide | 1 | 1 | 1.0 |
| N h | 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 | 479, 1100, 1080 | Silicon-oxygen (Si-O), Alkyl C-H | 1 |
| AgNPs | 479, 1232, 1048 | Alkyl C-H | 1 |
| polystyrene | 479, 1020, 1600 | Alkyl C-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 479 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
“Evaluation of leaf aqueous extract and synthesized silver & Mathath Roni Kadarkarai Murugan & Chellasamy Panneerselvam Jayapal Subramaniam Received: 2 November 2012/Accepted: 22 November 2012/Published online: 13 December 2012 # Springer-Ve”
Roni 等 - 2013 - Evaluation of leaf aqueous extract and synthesized DOI: 10.1007/s00436-012-3220-3 -
Carbon dioxide hyder 1.0
“cm-1, cm-1, cm-1 lowest frequency band, observed at 478.71 474.91 472.12 is assigned to the Fe3+↔O, Co2+↔O octahedral metal stretching of given in Table 2.”
Synthesis, Structural, Optical, Electrical and Mössbauer spectroscopic studies of Co substituted Li0.5Fe2.5O4 DOI: 10.1016/j.jmmm.2016.01.023 -
hyder 1.0
“RHE, two peaks appeared at 479 the corresponding current on the CV curve increased rapidly, which revealed that Ni oxyhydroxides formed on the reconstructed surface of Ni2P/NF were the real active sites for catalyzing the ammonia decomposit”
Ni(II)/Ni(III) redox couple endows Ni foam-supported Ni2P with excellent capability for direct ammonia oxidation DOI: 10.1016/j.cej.2020.126795 -
Alkyl C-H hyder 1.0
“CO (stretching) + CCH (stretching) + ring of pyranose (antisymmetric stretching) stretching)/C-O 1255 CO (stretching) + CCH (stretching) + ring of pyranose (antisymmetric (stretching), alcohol, ester, ether, carboxylic acid C-N+ 1078 (symme”
Hayyan 等 - 2015 - Functionalization of graphene using deep eutectic DOI: 10.1186/s11671-015-1004-2 -
hyder 1.0
“The I 6 cm-1 peak at 479 represents the bending normal vibrations of the Ti-O bond.”
Fabrication of Europium-Doped Barium Titanate/Polystyrene Polymer Nanocomposites Using Ultrasonication-Assisted Method: Structural and Optical Properties DOI: 10.3390/polym14214664 -
Phosphate (PO4) hyder 1.0
“Based on the listed deconvolution parameters in Table 2, the band at 479 cm-1 is attributed to the bending vibrations of O-P-O in (PO2-)n chain groups [18].”
The Influence of CoO/P2O5 Substitutions on the Structural, Mechanical, and Radiation Shielding of Boro-Phosphate Glasses DOI: 10.3390/ma14216632 -
hyder 1.0
“cm-1 for Si-O-Si groups (stretching and bending vibrations, respectively), 968 cm-1 for Si-OH groups cm-1 cm-1 813 for Si-O-Si groups (stretching and bending vibrations, respectively), 968 for Si-OH (stretching vibrations) and 479 cm-1 for”
Zdarta 等 - 2017 - Lipase B from Candida antarctica Immobilized on a DOI: 10.3390/catal7010014 -
hyder 0.9
“Peak at 479 cm-1 assigned to free SiO4.”
Phase Composition of Silica Fume—Portland Cement Systems Formed under Hydrothermal Curing Evaluated by FTIR, XRD, and TGA DOI: 10.3390/ma14112786
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.