What absorbs at 1454 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1454 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.

Possible functional-group assignments

Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.

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 1454 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.

Literature behind these assignments

• Alkyl C-H confidence 1.0

  “cm-1 C-H is assigned to the The peak centered at 1454”

  Braun 等 - 2006 - Infrared spectroscopic determination of lactide co DOI: 10.1021/ma061922a
• Acetate confidence 1.0

  “Table 3, According to the IR data in W-DHS has characteristic peaks at 1513, 1377, 1194 and cm-1 corresponding to the characteristic peaks of TC-DHS at 1727 (C=O vibration), 1454, 1057 cm-1.”

  Discrimination and similarity evaluation of tissue-cultured and wild Dendrobium species using Fourier Transform Infrared Spectroscopy DOI: 10.1016/j.molstruc.2015.01.027
• Alkyl C-H confidence 1.0

  “cm(cid:2)1 spectrum.107-110 observed at 2937 as a broad peak in the cm(cid:2)1 C-H Another sharp peak at 1454 represented the bending of-CH 2-groupsinPAN.105,107,108ThecombinedvibrationofC-H Creative -CH 22021.”

  Electrocatalytic and structural properties and computational calculation of PAN-EC-PC-TPAI-I2 gel polymer electrolytes for dye sensitized solar cell application DOI: 10.1039/d1ra01983j
• C c single bond confidence 1.0

  “The peaks at 1487 1454cm-1 -COOν and are due to the between and C-C”

  Das 等 - 2004 - Kinetics and adsorption behaviour of salicylate on DOI: 10.1016/j.colsurfa.2004.02.010
• Alkyl C-H confidence 1.0

  “[95] found a small peak at 1454 on ATR-FTIR attributed to the bendingshaking of C-H bonds of CH aliphatic sets of triglycerides in almonds.”

  Characterizing the Bioactive Ingredients in Sesame Oil Affected by Multiple Roasting Methods DOI: 10.3390/foods11152261
• Alkyl C-H confidence 1.0

  “cm-1 and 2611.01 >3000 (Medium) Alkane (C-H Stretching) 2715.39 2879.43cm-1 and2868.32cm-1 ±2860cm-1 Alkane(C-HStretching) (Medium) 2210.28cm-1 ±2200cm-1 Alkyne(C≡CStretching) (Medium) cm-1 cm-1 2935.05 ±2935 (Medium) Alkane (C-H Stretching”

  Validation of the Developed Zero-Order Infrared Spectrophotometry Method for Qualitative and Quantitative Analyses of Tranexamic Acid in Marketed Tablets DOI: 10.3390/molecules26226985
• Protein confidence 1.0

  “1058cm(cid:3)1 is found on the contrary to the protein bands at 1454 [27] F.”

  Rapid approach to analyze biochemical variation in rat organs by ATR FTIR spectroscopy DOI: 10.1016/j.saa.2013.09.131
• Alkyl C-H confidence 1.0

  “The peaks at 1454, and of CH scissoring, and 2 COOThe FMNs were stored in an airtight amber bottle to prevent C=O symmetric stretching of the group in amino exposure to light and oxygen.”

  Sukprasert 等 - 2020 - Synchrotron FTIR Light Reveals Signal Changes of B DOI: 10.1155/2020/6149713