What absorbs at 433 cm⁻¹ in an FTIR spectrum?
A band near 433 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
Snel antwoord
A band near 433 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.
Mogelijke functionele-groeptoewijzingen
| Functionele groep | Ondersteunende feiten | Geciteerde bronnen | Hoogste vertrouwen |
|---|---|---|---|
| Metal oxygen | 3 | 3 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
Ranglijst weerspiegelt cumulatief literatuurbewijs, niet één gezaghebbende regel. Bevestig altijd aan de hand van uw monsterecontext.
Mogelijke materialen
| Materiaal | Ondersteunende pieken | Overlappende groepen | Geciteerde bronnen |
|---|---|---|---|
| SiO2 | 433, 1739, 699 | Hydroxyl (O-H), Metal oxygen | 1 |
| hydroxyapatite | 433, 1620, 1639 | Phosphate (PO4), Hydroxyl (O-H) | 1 |
Materialen worden alleen getoond wanneer dezelfde literatuurpool deze band en ten minste één extra karakteristieke piek ondersteunt.
Spectrumlogica
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 433 cm⁻¹ is usually not enough for material identification by itself.
Gebruik in de praktijk
Dit type query komt vaak voor bij polymeeridentificatie, screening van onbekende kunststoffen, probleemoplossing bij QC, verificatie van gerecycled materiaal en literatuurondersteunde beoordeling van piektoewijzing.
Veelgemaakte fouten
- Het behandelen van een enkele geïsoleerde band als bewijs van een materiaal zonder ten minste een of twee ondersteunende pieken te controleren.
- Overlap negeren: meerdere functionele groepen kunnen bijdragen rond hetzelfde golfgetal.
- Validatie overslaan wanneer additieven, mengsels, oxidatie of verontreiniging het spectrum kunnen verstoren.
Advies voor verificatie
Wanneer dubbelzinnigheid blijft bestaan, valideer de hypothese met DSC, GC-MS of TGA, vooral voor mengsels, gedegradeerde monsters en gevulde polymeren.
Literatuur achter deze toewijzingen
-
Phosphate (PO4) vertrouwen 1,0
“592cm(cid:1)1 showed the same peaks at 433 and due to internal O492 1.7m2/g) perature was greater at 0% (from 5.7 to and 5% SAID 430 963cm(cid:1)1 43(cid:1) PAO P-O vibration, at due to of the PO and at 1040 493 1.6m2/g) 1.4m2/g) (from 4.7”
Structure reinforcement of porous hydroxyapatite pellets using sodium carbonate as sintering aid: Microstructure, secondary phases and mechanical properties DOI: 10.1016/j.apt.2019.05.013 -
Metal oxygen vertrouwen 1,0
“4]2(cid:2) 711-933cm(cid:2)1, tetrahedrons was detected at and The strong W-O stretching in [WO 433cm(cid:2)1.”
Phuruangrat 等 - 2010 - Synthesis, characterisation and photoluminescence DOI: 10.1080/17458080903513276 -
vertrouwen 1,0
“From Fourier Transform Infrared cm-1 Spectroscopy (FTIR), the band at 433 is attributed to Zn-O bond Key words: Nanoparticles, Optical properties, XRD”
Pandiyarajan 和 Karthikeyan - 2011 - Optical, phonon and structural analysis of Na dope DOI: 10.1117/12.890082 -
Metal oxygen vertrouwen 1,0
“From the FTIR spectrum, a strong peak of 862 has been obtained due to the 42cm-1 stretching vibration of WO in scheelite structure, and a weak but sharp band at 433 has been noticed due to the metal-oxygen (Ca-O) band.”
Abozaid 等 - 2018 - Characterization of Neodymium Doped Calcium Tungst DOI: 10.2298/SOS1804445A -
Phosphate (PO4) vertrouwen 1,0
“The peaks at 433 cm-1 and 447 cm-1 were assigned to PO43υ2 vibration (bending mode), and the peaks at 1030 cm-1, 1047 cm-1 and 1079 cm-1 (arb.”
Gavinho 等 - 2023 - An Eco-Friendly Process to Extract Hydroxyapatite DOI: 10.3390/jfb14050279 -
Hydroxyl (O-H) vertrouwen 1,0
“The first 3,630 The stretching and bending vibrations of the one (up to 433 K) is attributed to the dehydration of the hydroxyl groups of water molecules present in the clay can cm-1,”
Natkanski 等 - 2013 - Effect of Fe3+ ions present in the structure of po DOI: 10.1007/s10973-013-3225-x -
vertrouwen 0,9
“Text: '433 are attributed to ... N bending vibrations'”
Francis 等 - 2016 - Optical nonlinearity in multiferroic bismuth ferri DOI: 10.1016/j.jallcom.2016.07.094 -
vertrouwen 0,7
“Lewis Al2Cl peaks assigned”
Understanding the molecular structure of the elastic and thermoreversible AlCl3:urea/polyethylene oxide gel electrolyte DOI: 10.1002/cssc.202001557
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