What absorbs at 2863 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 2863 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 2863 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

• Alkyl C-H keyakinan 1.0

  “Medium to strong intensity of Total 6, 0, 1 and 5 peaks were obtained in these regions C-H stretching vibrations resulted in two peaks at 2862.54 respectively.”

  Chaudhari 等 - 2015 - Fourier transform infrared analysis of Tamra Bhasm DOI: 10.4103/0974-8520.169013
• Alkyl C-H keyakinan 1.0

  “2018) cm-1 consists in a high temperature treatment of ores and alloys, attributable to the C-H stretching 2933, 2891 and 2863 cm-1 that is meant to separate noble metals, such as gold and silver, of CH and CH groups, the strong band at 173”

  The combined use of SEM-EDX, Raman, ATR-FTIR and visible reflectance techniques for the characterisation of Roman wall painting pigments from Monte d’Oro area (Rome): an insight into red, yellow and pink shades DOI: 10.1007/s11356-021-15085-w
• Carbohydrate keyakinan 1.0

  “Also peaks 2863cm-1 represent the asymmetric and symmetric stretchfrom 3.3 to 3.9ppm correspond to protons of glucose amine 2and -CH 3, respectively, ing vibrations of the -CH in chitosan [15].”

  Naghibzadeh 等 - 2010 - An Insight into the Interactions between alpha-Toc DOI: 10.1155/2010/818717
• Hydroxyl (O-H) keyakinan 1.0

  “2021, 68, 945-954 949 cm-1 at 1639.76 may be attributed to the bending vibration modes of O-H groups of these adsorbed H 2O molecules.49 Further, three small bands at 2862.62, 2928.94, cm-1 may be ascribed to the asymmetric and and 2959.97”

  Shojaei 和 Komsari - 2021 - Synthesis of CuO by Electrospinning Method for Sen DOI: 10.17344/acsi.2021.6914
• keyakinan 0.5

  “Text: 'bands at 2863 and 2931' without assignment”

  Alipour 等 - 2022 - The Effect of Vitamin C-Loaded Electrospun Polycap DOI: 10.21203/rs.3.rs-1587404/v1