What absorbs at 2570 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 2570 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.

可能的官能团归属

排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。

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 2570 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.

这些分配背后的文献

• C-S single bond 置信度 1.0

  “The 52 53 spectrum of TMPMP exhibits characteristic stretching vibration of S-H and C-S at 2570 and 627 54 55”

  Ataei 等 - 2020 - Electrosprayed PMMA microcapsules containing green DOI: 10.1088/1361-665X/ab9754
• 置信度 1.0

  “The peak at 2570 is 3 Likewise, we observe a weak band with low peak intensity assigned to the N-H stretching in the NH group.”

  Studies of the behavior of reverse nonionic surfactant Pluronic 31R1 in aqueous and Propylammonium acetate (PAAc) ionic liquid solutions DOI: 10.1007/s10965-020-02315-x
• Thiol 置信度 1.0

  “The spectrum of the thiol 3SH-EU shows a weak band at cm-1 2570 corresponding to the S-H stretching.”

  Guzman 等 - 2017 - New bio-based materials obtained by thiol-enethio DOI: 10.1002/pi.5336.
• Thiol 置信度 1.0

  “One can see cm-1, the complete disappearance of the thiol peak at 2570 accompanied by an appearance of a hydroxyl peak cm-1.”

  Konuray 等 - 2017 - Latent curing of epoxy-thiol thermosets DOI: 10.1016/j.polymer.2017.03.064
• Alkyl C-H 置信度 1.0

  “Inbothscenarios, cm-1 Polymers 9, 2017, x FOR PEER REVIEW 7 of 14 C≡C, 1 2103, 3274, and 2570 ascribed to the absorptions of C-H in alkynyl groups on [30] and 5, S-H on respectively were not observed on the spectra of the polymers (MIP-NSHs”

  Fabrication of Hypericin Imprinted Polymer Nanospheres via Thiol-Yne Click Reaction DOI: 10.3390/polym9100469
• Acetate 置信度 1.0

  “Their IR spectra, along with those of monomer crosslinker characteristic absorptions at 1735 and 2570 cm-1 (C=O and S-H) on crosslinker 2 were observed on characteristic absorptions at 1735 and 2570 cm-1 (C=O and S-H) on crosslinker 2 were”

  Fabrication of Core-Shell Magnetic Molecularly Imprinted Nanospheres towards Hypericin via Click Polymerization DOI: 10.3390/polym11020313
• Thiol 置信度 1.0

  “Moreover, there were no obvious S-H characteristic peaks at 2570 Combined with the existence and -CH2-.”

  Zhang 等 - 2020 - Superhydrophobic Polypyrrole-Coated Cigarette Filt DOI: 10.3390/app10061985