What absorbs at 516 cm⁻¹ in an FTIR spectrum?

Raskt svar

A band near 516 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 516 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

  “stretching alkylhalide(halocompound) stretching 780.86 strong C-Cl alkylhalide(halocompound) stretching 516.39 strong C-I 2.4.”

  Phytochemical Composition of Combretum molle (R. Br. ex G. Don.) Engl. & Diels Leaf and Stem Extracts DOI: 10.3390/plants12081702
• Silicon (Si) konfidens 1.0

  “Bands at516 and assigned toAl-Oconcentration in the supernatant solution during the adsorption process Si and Si-O-Si bending vibrations, respectively (Chieng et al., 2010;”

  Sodium montmorillonite/ureasil-poly(oxyethylene) nanocomposite as potential adsorbent of cationic dye DOI: 10.1016/j.clay.2017.11.009
• Metal oxygen konfidens 1.0

  “Figure 1(a) showed the first weight loss up to 516cm-1 320∘ [11], and the V-O-V V symmetric stretch around C with a large endotherm, associated with the volatiliza756cm-1 asymmetric stretch at [12].”

  Gokdemir 等 - 2014 - Structural Modification of Sol-Gel Synthesized V2O DOI: 10.1155/2014/795384
• Silicon-oxygen (Si-O) konfidens 1.0

  “LLM confirmed rule peak-group candidate”

  The physicochemical and biomechanical profile of forsterite and its osteogenic potential of mesenchymal stromal cells DOI: 10.1371/journal.
• konfidens 1.0

  “Notably, prominent vibrations at 516, 510, and 509 correspond to Fe-O-As ligand vibrations [43].”

  Morales-Mendoza 等 - 2023 - Effect of Micro-Nanobubbles on Arsenic Removal by DOI: 10.3390/jof9080857
• konfidens 1.0

  “The two peaks at 516 and 462 correspond to stretching vibration of the Al-O and”

  Influence of montmorillonite/carbon nanotube hybrid nanofillers on the properties of poly(lactic acid) DOI: 10.1016/j.clay.2020.105925
• konfidens 1.0

  “516cm-1 shows the presence of Al-OH bond.”

  Tsekpo 等 - 2023 - Fabrication, Properties, and Performance of Polyme DOI: 10.1155/2023/5683415
• Silicon (Si) konfidens 1.0

  “the peak at 516 cm-1 was caused by the Si-O-Fe stretching vibrations whilst the peaks at 638 cm-1 and at 838 cm-1 were due to Si-O stretching vibrations and Si-O-Al stretching vibrations, respectively.”

  Investigation on the Painting Materials and Profile Structures Used in Ancient Chinese Folk Architectural Paintings by Multiple Analytical Methods DOI: 10.3390/coatings12030320