What absorbs at 419 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 419 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 419 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

• 신뢰도 1.0

  “The FTIR spectra of unstabilized ZnO cm-1 nanofluids reveal main absorption bands at 419 and 412 attributed to the Zn-O stretching vibration mode [34].”

  Gum Arabic As Natural Stabilizing Agent In Green Synthesis Of ZnO Nanofluids For Antibacterial Application DOI: 10.1016/j.jece.2019.103331
• 신뢰도 1.0

  “cm-1 cm-1 be attributed to the absorption band 3444 The peaks at 419 and 589 were attributed the stretchcm-1 ing vibration of the Fe-O.”

  Photocatalytic activity of ZrO2/TiO2/Fe3O4 ternary nanocomposite for the degradation of naproxen: characterization and optimization using response surface methodology DOI: 10.1038/s41598-022-14676-y
• 신뢰도 1.0

  “Moreover, the strong absorption bands at cm-1 419 revealed the stretching mode of Cu-O bond vibration in the monoclinic phase of CuO-NPs.”

  Structural and UV-blocking properties of carboxymethyl cellulose sodium/CuO nanocomposite films DOI: 10.1038/s41598-023-28032-1
• Amide 신뢰도 1.0

  “However, a shift toward lower wavenumbers, 419 sponds to the C N stretching of the quinonimine units produced 395 v”

  Bleda-Martinez 等 - 2008 - Electrochemical methods to enhance the capacitance DOI: 10.1149/1.2956969(cid:4)
• Metalloid oxygen 신뢰도 1.0

  “In our case, weak bands were detected at 419, 668 cm-1 cm-1 and 746 which could be related to Te-O bond vibrations.”

  Pamukchieva 等 - 2012 - IR studies of impurities in chalcogenide glasses a DOI: 10.1088/1742-6596/356/1/012047
• C-O single bond 신뢰도 1.0

  “(-CH 2) bending, (-C-O) stretch and (=CH 2) wagging, 419 respectively [41].”

  Rasul 等 - 2022 - Development of antimicrobialantioxidant nanocompo DOI: 10.21203/rs.3.rs-337479/v1
• 신뢰도 0.95

  “Explicit: 'O-Cr-O bending mode at 419'.”

  Athawale 和 Desai - 2011 - Silver doped lanthanum chromites by microwave comb DOI: 10.1016/j.ceramint.2011.05.008
• 신뢰도 0.7

  “Assigned to B combination bands.”

  Kollipost 等 - 2012 - Communication The highest frequency hydrogen bond DOI: 10.1063/1.4704827