What absorbs at 1184 cm⁻¹ in an FTIR spectrum?

Snel antwoord

A band near 1184 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.

Mogelijke materialen

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 1184 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

• Alkyl C-H vertrouwen 1,0

  “- - - - - 1265 1267 1263 Amino acid, CH and CH2 vibrations 1184 1199 -”

  Doerr 等 - 2008 - Far infrared spectroscopy on hemoproteins A model DOI: 10.1016/j.vibspec.2008.02.003
• Aromatic ring vertrouwen 1,0

  “The main Raman lines observed in In order to show the vibrational properties of the composites resulting from the elecare attributed to the vibrational modes caused by the deformation of the benzene ring, Figure 5a-c have maxima at ~415-498”

  The Photoluminescence and Vibrational Properties of Black Phosphorous Sheets Chemically/Electrochemically Functionalized in the Presence of Diphenylamine DOI: 10.3390/polym14214479
• Acetate vertrouwen 1,0

  “Furthermore, the cm-1 cm-1 1184 and 1038 bands could be attributed to the C-O stretching vibrations of 1184 cm-1 and 1038 cm-1 bands could be attributed to the C-O stretching vibrations of alcohols, esters, ethers and carboxylic acids from”

  Green Synthesis and Characterization of Silver Nanoparticles Using a Lythrum salicaria Extract and In Vitro Exploration of Their Biological Activities DOI: 10.3390/life12101643
• Acetate vertrouwen 1,0

  “The thermal properties such as glass transition and are correpeaks at = temperature (T g), melting temperature (T m) and enthalpies O and -CH 2, the sponding to the characteristic peaks of C 1184∼1190cm-1 m) were measured using a Perkin-Elm”

  Fang 等 - 2009 - Synthesis of Poly(L-lactide) via Solvothermal Meth DOI: 10.1155/2009/929732
• Carbohydrate vertrouwen 1,0

  “weighted peak around 1270 is related to guaiacyl ringin in The positive weighted peaks around cm-1 cm-1 1108 and 1062 and the negative weighted peaks around 1184 are related to hemicellulose, while the cm-1 positive weighted peaks around 99”

  Soil-applied selenite increases selenium and reduces cadmium in roots of Moringa oleifera DOI: 10.1038/s41598-020-77350-1
• Aromatic ring vertrouwen 1,0

  “Bands corresponding to the surfactant SDBS are also present in the figure, such as the S=O bonding vibrations present at 1184 cm-1 and 1043 cm-1, the cm-1 cm-1, in the figure, such as the S=O bonding vibrations present at 1184 and 1043 arom”

  Study of Melamine-Formaldehyde/Phase Change Material Microcapsules for the Preparation of Polymer Films by Extrusion DOI: 10.3390/membranes12030266
• Amide vertrouwen 1,0

  “The peak at 177 cm-1 is with the highest intensity are 101, 177, 1144, 1456, and 2923 attributed to Zn-N bond vibrations, the peak at 682 cm-1 is attributed to imidazolate ring puckering vibrations, the peak at 1144 cm-1 is attributed to Zn”

  Biocatalysts Synthesized with Lipase from Pseudomonas cepacia on Glycol-Modified ZIF-8: Characterization and Utilization in the Synthesis of Green Biodiesel DOI: 10.3390/molecules27175396
• Acetate vertrouwen 1,0

  “1184cm-1 Δ𝐼 (a stretching vibration of the C-O group of lipid The linear increase in the value of the parameter in”

  Oleszko 等 - 2015 - Application of FTIR-ATR Spectroscopy to Determine DOI: 10.1155/2015/245607