What absorbs at 488 cm⁻¹ in an FTIR spectrum?

Snel antwoord

A band near 488 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

Ranglijst weerspiegelt cumulatief literatuurbewijs, niet één gezaghebbende regel. Bevestig altijd aan de hand van uw monsterecontext.

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 488 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

• vertrouwen 1,0

  “peak at ~488 due to Zn-O stretching mode.”

  Chakraborty 等 - 2012 - ZnOTi Thin Film Synthesis, Characterization and DOI: 10.1088/1742-6596/390/1/012065
• Hydroxyl (O-H) vertrouwen 1,0

  “The Mn doping has in900 which correspond to strain vibration of O-H group of duced a change of particle shape, from the typical rod-like one 900 which correspond to strain vibration of O-H group of duced a change of particle shape, from the”

  Harsono 等 - 2017 - Paramagnetic Zn(1-x)MnxO (0.00≤x≤0.06) Nanopar DOI: 10.4313/TEEM.2017.18.1.46
• vertrouwen 1,0

  “Vibrations(cm-1) Assignment 488 Si O SirockingvibrationinLOmode 522 LowerfrequencySi Ovibration”

  Jana 等 - 2008 - Non-hydrolytic sol-gel synthesis of epoxysilane-ba DOI: 10.1016/j.matchemphys.2008.06.070
• Carboxyl (COOH) vertrouwen 1,0

  “The equivalent carboxyl group peaks in 488 (1:100) U.K.) in 1% BSA in PBS, was cm-1, respectively18 pure Tar are observed at 1550 and 1740 consequently added to the samples and incubated for 1 h at room confirms temperature followed by anot”

  Chiral Tartaric Acid Improves Fracture Toughness of Bioactive Brushite–Collagen Bone Cements DOI: 10.1021/acsabm.0c00555
• Phosphate (PO4) vertrouwen 1,0

  “The strong adsorption band at around 1125 cm-1 was ascribed to an asymmetric P-O-Al stretching vibration, and the one at 488 cm-1 was assigned to symmetrical P-O-Al deformation vibration [38,39];”

  Efficient and Stable O-Methylation of Catechol with Dimethyl Carbonate over Aluminophosphate Catalysts DOI: 10.3390/catal13010150
• vertrouwen 0,9

  “Explicit assignment in text.”

  Magnetic Properties of MFeCrO4 (M = Co/Ni) Prepared by Solution Combustion Method DOI: 10.1007/s10948-019-5080-x
• vertrouwen 0,8

  “Assigned to ν(Sn-O) in region 488-495”

  Tributyltin(IV) Butyrate: A Novel Epigenetic Modifier with ER Stress- and Apoptosis-Inducing Properties in Colon Cancer Cells DOI: 10.3390/molecules26165010