What absorbs at 1197 cm⁻¹ in an FTIR spectrum?

Brzi odgovor

A band near 1197 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

Rangiranje odražava akumulirane literaturne dokaze, a ne jedno autoritativno pravilo. Uvijek provjerite u kontekstu vašeg uzorka.

Mogući materijali

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 1197 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

• Alkyl C-H pouzdanost 1,0

  “sativa at 1196.7202 ascribed to O-CH stretching which was absent in oil but present in band at 1196.7202 cm-1 ascribed to O-CH2 stretching which was absent in E.”

  Synthesis of Lipase-Immobilized CeO2 Nanorods as Heterogeneous Nano-Biocatalyst for Optimized Biodiesel Production from Eruca sativa Seed Oil DOI: 10.3390/catal10020231
• Acetate pouzdanost 1,0

  “The bands at 1432 and 1358 were caused by the bending of CH 2 cm-1 and C-H, while the band at 1197 was caused by the stretching of C-O groups from”

  Adsorption of Oil by 3-(Triethoxysilyl) Propyl Isocyanate-Modified Cellulose Nanocrystals DOI: 10.3390/pr10102154
• Acetate pouzdanost 1,0

  “1245 1245 -C-O stretching 1197 1197 1169”

  Spectroscopic studies of the quality of WCO (Waste Cooking Oil) fatty acid methyl esters DOI: 10.1051/bioconf/20181002019
• pouzdanost 1,0

  “The 4-2 42triple asymmetric S-O stretching in barite which also indicates the stretching of SO peak at 1197 cm-1 shows the asymmetric and bond vibration [27].”

  Characterization and Suitability of Nigerian Barites for Different Industrial Applications DOI: 10.3390/min11040360
• pouzdanost 0,9

  “Text: 'C-O stretching bands at 1171, 1197 and 1245'.”

  Kanakdande 等 - 2019 - Pineapple Waste and Wastewater Route for Biodiese DOI: 10.1590/1678-4324-2019180499
• Phosphate (PO4) pouzdanost 0,9

  “from DOPO-HQ”

  Wen 等 - 2018 - A novel oligomer containing DOPO and ferrocene gro DOI: 10.1016/j.polymdegradstab.2018.08.010