What absorbs at 622 cm⁻¹ in an FTIR spectrum?
A band near 622 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 6 cited sources
Brzi odgovor
A band near 622 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.
Moguće dodjele funkcionalnih skupina
| Funkcionalna skupina | Potporni dokazi | Citirani izvori | Najveća pouzdanost |
|---|---|---|---|
| Metal oxygen | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
Rangiranje odražava akumulirane literaturne dokaze, a ne jedno autoritativno pravilo. Uvijek provjerite u kontekstu vašeg uzorka.
Mogući materijali
| Materijal | Potporni vrhovi | Preklapajuće skupine | Citirani izvori |
|---|---|---|---|
| NiO | 622, 1006, 1450 | Metal oxygen, Methoxy (OCH3), Methacrylate | 1 |
| PE | 622, 1414, 1700 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| PP | 622, 1700, 1043 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
Materijali su prikazani samo kada ista literatura podržava ovu traku i barem jedan dodatni karakteristični vrh.
Logika spektra
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 622 cm⁻¹ is usually not enough for material identification by itself.
Upotreba u stvarnom svijetu
Ova vrsta upita uobičajena je u identifikaciji polimera, probiru nepoznate plastike, rješavanju problema u kontroli kvalitete, provjeri recikliranog materijala i pregledu dodjele vrhova potkrijepljenom literaturom.
Uobičajene pogreške
- Tretiranje jedne izolirane vrpce kao dokaza materijala bez provjere barem jednog ili dva podržavajuća pika.
- Zanemarivanje preklapanja: više funkcionalnih skupina može doprinositi u blizini istog valnog broja.
- Preskakanje validacije kada aditivi, mješavine, oksidacija ili kontaminacija mogu izobličiti spektar.
Savjet za provjeru
Kada nejasnoća ostane, validirajte hipotezu pomoću DSC, GC-MS ili TGA, posebno za mješavine, degradirane uzorke i punjene polimere.
Literatura iza ovih dodjela
-
pouzdanost 1,0
“The cm-1 Mn2+ ZnS.24 band at 1,105 demonstrate that the doped impurity affected partial structure of cm-1 modes.9 A very strong band at 622 is attributed to Zn-S stretching The band positioned at”
Hu 等 - 2018 - Photoluminescence of ZnS Mn quantum dot by hydrot DOI: 10.1063/1.5010833 -
pouzdanost 1,0
“The interface potential detected by the probed ((cid:4) ric S O bending vibrations), 622 634 and 650 4”
Simultaneous in situ Kelvin probe and Raman spectroscopy analysis of electrode potentials and molecular structures at polymer covered salt layers on steel DOI: 10.1016/j.electacta.2012.08.042 -
C c single bond pouzdanost 1,0
“the spectra of the silicon substrate, while that for PMMA on the klarite surface was seen at cm-1 cm-1 cm-1 622 due to C-C-O stretching, 817 (C-O-C symmetric stretching), 1000 E P”
Kundu 等 - 2021 - Identification and removal of microand nano-plas DOI: 10.1016/j.cej.2021.129816. -
pouzdanost 1,0
“vibrational mode of Ni-O, which corresponds between Ni-O and another better peak at 621.5 cm-1 cm-1, There were sharp peaks like 1121.4 and 1426.6 confirming that the carbonates had”
Venkatachalapathy 等 - 2022 - Synthesis, morphological, structural, functional, DOI: 10.15251/DJNB.2022.174.1441 -
pouzdanost 0,9
“Assignment: 'TiOMo at 622'”
Errington 等 - 2010 - Synthesis and Structure of the Alkoxido-Titanium P DOI: 10.1007/s10876-010-0329-3 -
pouzdanost 0,9
“Explicit assignment.”
Afqir 等 - 2018 - Structural, electric and dielectric properties of DOI: 10.2298/PAC1801072A
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