What absorbs at 426 cm⁻¹ in an FTIR spectrum?

Raskt svar

A band near 426 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.

Mulige funksjonelle gruppe-tilordninger

Rangeringen gjenspeiler akkumulert litteraturbevis, ikke en enkelt autoritativ regel. Bekreft alltid mot prøvekonteksten din.

Mulige materialer

Materialer vises kun når samme litteraturbase støtter dette båndet og minst en annen karakteristisk topp.

Spektrum-logikk

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 426 cm⁻¹ is usually not enough for material identification by itself.

Virkelig bruk

Denne typen forespørsel er vanlig i polymeridentifikasjon, screening av ukjent plast, feilsøking i kvalitetskontroll, verifisering av resirkulert materiale og litteraturstøttet gjennomgang av topptilordning.

Vanlige feil

• Behandle ett isolert bånd som bevis på et materiale uten å sjekke minst en eller to støttende topper.
• Ignorerer overlapping: flere funksjonelle grupper kan bidra nær samme bølgetall.
• Hopp over validering når tilsetningsstoffer, blandinger, oksidasjon eller forurensning kan forvrenge spekteret.

Verifiseringsråd

Når tvetydighet gjenstår, valider hypotesen med DSC, GC-MS eller TGA, spesielt for blandinger, nedbrutte prøver og fylte polymerer.

Litteratur bak disse tilordningene

• konfidens 1.0

  “The peaks at 426 and 743 appeared only for FHO, which was assigned to the Fe-O-Fe stretching vibration [24] and would be the Fe-OH band, respectively [25].”

  Kim 等 - 2019 - The Application of Alginate Coated Iron Hydroxide DOI: 10.3390/app9183835
• Water (H2O) konfidens 1.0

  “First peak reflects slightly 426 bound water loss and second peak evinces degradation of polymeric structure (Giancone et al., 2011).”

  Evaluation of structural integrity and functionality of commercial pectin based edible films incorporated with corn flour, beetroot, orange peel, muesli and rice flour DOI: 10.1016/j.foodhyd.2019.01.022
• konfidens 1.0

  “Further addition of new peaks at 613 and 426 cm-1 strongly revealed the growth of inorganic particles (due to (a.u.) Fe-O vibrations) on the NSS surface.”

  Facile Synthesis of Magnetic Nigella Sativa Seeds: Advances on Nano-Formulation Approaches for Delivering Antioxidants and Their Antifungal Activity against Candida albicans DOI: 10.3390/pharmaceutics15020642
• Metal oxygen konfidens 1.0

  “spectra of the deposited ZnO Characteristic cm-1 Zn-O peaks at 426 are related to stretching vibration and vibration-phonon mode E (transversal optic) also, a 1 cm-1 Zn-O is attributed to the stretching second peak at 490 reports.19-21 vibr”

  Salinas Dominguez 等 - 2020 - Antibody Immobilization in Zinc Oxide Thin Films a DOI: 10.1021/acsomega.0c02583
• konfidens 1.0

  “4 cm-1 νCu(II)-O 426.0 is assigned to the stretching vibrations of copper oxide CuO [25].”

  Silva 等 - 2021 - Potential Production of Theranostic Boron Nitride DOI: 10.3390/nano11112907
• konfidens 0.9

  “Peak assigned to Si-O-Si rocking.”

  Mahisagar 等 - 2012 - Deposition of porous low-k thin films using Tween DOI: 10.1117/12.927332