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
Kiire vastus
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.
Võimalikud funktsionaalrühmade määramised
| Funktsionaalrühm | Toetavad faktid | Tsiteeritud allikad | Kõrgeim usaldusväärsus |
|---|---|---|---|
| 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 |
Reiting kajastab kogunenud kirjanduslikke tõendeid, mitte ühte autoriteetset reeglit. Kinnitage alati oma proovi kontekstis.
Võimalikud materjalid
| Materjal | Toetavad piigid | Kattuvad rühmad | Tsiteeritud allikad |
|---|---|---|---|
| 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 |
Materjale kuvatakse ainult siis, kui sama kirjanduse kogum toetab seda riba ja vähemalt ühte täiendavat iseloomulikku piiki.
Spektri loogika
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.
Reaalse maailma kasutus
Seda tüüpi päring on tavaline polümeeri tuvastamisel, tundmatu plasti sõeluuringul, kvaliteedikontrolli probleemide lahendamisel, ringlussevõetud materjali kontrollimisel ja kirjandusel põhineval piirkinnituste ülevaatel.
Levinud vead
- Ühe isoleeritud riba käsitlemine materjali tõendina ilma vähemalt ühte või kahte toetavat piiki kontrollimata.
- Ülekattumise ignoreerimine: mitu funktsionaalrühma võivad anda panuse sama lainearvu lähedal.
- Valideerimise vahelejätmine, kui lisandid, segud, oksüdatsioon või saastumine võivad spektrit moonutada.
Kontrollimise nõuanne
Kui ebakindlus püsib, kinnitage hüpotees DSC, GC-MS või TGA abil, eriti segude, lagunenud proovide ja täidetud polümeeride puhul.
Nende määramiste taga olev kirjandus
-
usaldusväärsus 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 usaldusväärsus 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 -
usaldusväärsus 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 usaldusväärsus 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 -
usaldusväärsus 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) usaldusväärsus 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 -
usaldusväärsus 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 -
usaldusväärsus 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
Kas teil on selle ribaga spekter?
Laadige üles oma FTIR spekter ja saage sekunditega täielik tõlgendusaruanne — piikide määramised kirjandusviidetega, raamatukogu vasted ja usaldusväärsusega hinnatud tõendite ahel.