What absorbs at 1203 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1203 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.

Penetapan kumpulan berfungsi yang mungkin

Pemeringkatan mencerminkan bukti literatur terkumpul, bukan satu peraturan berwibawa. Sentiasa sahkan terhadap konteks sampel anda.

Possible materials

Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.

Spectrum logic

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 1203 cm⁻¹ is usually not enough for material identification by itself.

Real-world usage

This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.

Common mistakes

• Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
• Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
• Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.

Verification advice

When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.

Literatur di sebalik penetapan ini

• Carbohydrate keyakinan 1.0

  “pennacea In addition, the band at 1203 is associated to oligo FTIR spectra of and corals and polysaccharide with C-O-C, C-O-P, P-O-P symsamples show the presence of chitin.”

  Juarez-de la Rosa 等 - 2012 - Effects of thermal treatments on the structure of DOI: 10.1007/s10853-011-5878-9
• Hydroxyl (O-H) keyakinan 1.0

  “All the bands attributed to 1203cm-1 OH bending at 1455, 1336 and are reduced in inten1035cm-1, related to sity.”

  Characterization of depolymerized residues from extremely low acid hydrolysis (ELA) of sugarcane bagasse cellulose: Effects of degree of polymerization, crystallinity and crystallite size on thermal decomposition DOI: 10.1016/j.indcrop.2011.11.009
• Acetate keyakinan 1.0

  “Moreover, the cm-1 peak at 1203 is due to the C-O-H vibrations.”

  Reduced graphene oxide-intercalated graphene oxide nano-hybrid for enhanced photoelectrochemical water reduction DOI: 10.1007/s40097-019-00324-x
• Alkyl C-H keyakinan 1.0

  “The non-polarized FTIR spectrum of the red class depicted an increased absorbance of β-sheet structures (amide I: 1697 and 1634 cm-1) and bands at 1338, 1283, 1238, and 1203 cm-1 attributed to the δ(CH2), δ(CH3), ν(C-N), and δ(N-H) absorpti”

  Fourier Transform Infrared Polarization Contrast Imaging Recognizes Proteins Degradation in Lungs upon Metastasis from Breast Cancer DOI: 10.3390/cancers13020162
• Acetate keyakinan 1.0

  “Additional bands appear at 1203 and 3030 that refer to C-O-H bending and N-H stretching, respectively [15].”

  Delgado-Mellado 等 - 2018 - Thermal stability of choline chloride deep eutecti DOI: 10.1016/j.molliq.2018.03.076
• Phosphate (PO4) keyakinan 1.0

  “The bands at 1203, 1128, 1095, and 880 recorded in FTIR spectra ascribed to the phosphate groups (P=O, -PO 2, -PO 3, and P-O-P, respectively) confirmed the successful cross-linking between CS, MC, and STMP.”

  Application of Vibrational Spectroscopic Techniques in the Study of the Natural Polysaccharides and Their Cross-Linking Process DOI: 10.3390/ijms24032630
• Hydrogen bond keyakinan 1.0

  “The strong absorption of the OH groups linked by hydrogen bonds of the glycosidic ring and the absorption band at 1203 cm-1 suggests the existence cm-1, cm-1, bonds at 3407 -CH, and -CH stretching vibrations at 2901 and C=O and C-C 2 of sul”

  Malyar 等 - 2023 - Microfibrillated Cellulose with a Lower Degree of DOI: 10.3390/polym15040904
• C c single bond keyakinan 1.0

  “C-H stretching vibration of methoxyl group 2926 C=C ring stretch (conjugated) in aromatic 1612 O-H bend of carboxylic acids 1444 C-C stretch in ketones 1342 C-C(O)-C stretch of esters 1203 cm-1 A strong band at 3404 was discovered and assig”

  Nwosu 和 Amusat - 2021 - DOI: 10.4152/pea.2021390605