What absorbs at 1448 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1448 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.

가능한 작용기 할당

순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.

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 1448 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.

이 할당의 배경이 되는 문헌

• Acetate 신뢰도 1.0

  “LLM confirmed rule peak-group candidate”

  Cristian 等 - 2015 - Removal of zinc ions from model wastewater system DOI: 10.1016/j.jwpe.2015.08.001
• Amide 신뢰도 1.0

  “Including cm-1 cm-1 the peak corresponding to amide II, two peaks at 1448 and 1078 are similar to the peaks at 1446 and”

  Analysis of the ex-vivo transformation of semen, saliva and urine as they dry out using ATR-FTIR spectroscopy and chemometric approach DOI: 10.1038/s41598-021-91009-5
• Alkyl C-H 신뢰도 1.0

  “The FT-IR peak at 2950 cm-1 represents asymmetric C-H stretching of methyl (CH 3) groups whereas the peak at 1448 is attributed to bending of methylene groups and both of these peaks were of higher intensity in acute serum samples.”

  Lymphatic filarial serum proteome profiling for identification and characterization of diagnostic biomarkers DOI: 10.1371/journal.
• Alkyl C-H 신뢰도 1.0

  “cm-1 The peaks centered at 1448 and 1156 in the PVA spectrum are originated from the stretching vibrations of C-H and O-H, respectively, revealing the PVA content cm-1 in the nanofibers.”

  Investigation of chemical bonding and electronic network of rGO/PANI/PVA electrospun nanofiber DOI: 10.1007/s00289-020-03442-7
• Alkyl C-H 신뢰도 1.0

  “The hydrocarbon characteristics absorption peaks at 1662 cm-1, 1448 cm-1, are shown in Figure 3.”

  Potency of Urea-Treated Halloysite Nanotubes for the Simultaneous Boosting of Mechanical Properties and Crystallization of Epoxidized Natural Rubber Composites DOI: 10.3390/polym13183068
• Alkene (C=C) 신뢰도 1.0

  “The important absorption peaks indicating stretching vibrations of C=C bonds, bending vibrations of CH2 and CH3 groups, and out of plane deformation of =C-H groups were found at 1662 cm-1, 1448 cm-1 and 1375 cm-1, and 837 cm-1 respectively.”

  Selectively Etched Halloysite Nanotubes as Performance Booster of Epoxidized Natural Rubber Composites DOI: 10.3390/polym13203536
• Amide 신뢰도 1.0

  “7b), while cm1 cm1 the 1448 (N-C-N asymmetric stretching) and the 1247 peak (C-N stretching, amine) can be linked to the urea byproduct(Piasek Z.”

  Azrak 等 - 2021 - Controlled Dispersion and Setting of Cellulose Nan DOI: 10.21203/rs.3.rs-376512/v1
• Alkyl C-H 신뢰도 1.0

  “Bands of methyl vibrations occur near 1448 Similar to the carbonyl bands of PET and PC, an IR band of”

  Optical photothermal infrared spectroscopy with simultaneously acquired Raman spectroscopy for two-dimensional microplastic identification DOI: 10.1038/s41598-022-23318-2