What absorbs at 3610 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3610 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 3610 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

• 置信度 1.0

  “2(cid:2) at = This result is inconsistent with the work by HZSM5 cm-1, of the band at 3610 which was due to partial exchange of Aboul-Gheit et al.”

  IR study of iridium bonded to perturbed silanol groups of Pt-HZSM5 for n-pentane isomerization DOI: 10.1016/j.apcata.2011.12.039
• Silicon (Si) 置信度 1.0

  “53 cm-1 Four bands were observed in the spectra of the three zeolites between 3500 to 3800 25 54 55 cm-1, cm-1 the band at 3610 is assigned to Si-OH-Al groups, which are associated with 26 56 57”

  Zhao 等 - 2019 - Comparison of Direct, Selective Oxidation of Metha DOI: 10.1021/acs.jpcc.9b04388
• Hydroxyl (O-H) 置信度 1.0

  “cm-1) (≈3610 In addition, Ca-OH stretching vibrations from crystalline jaffeite and cm-1) (≈3540 α-C α-C 2SH can be observed in the spectra of S0.”

  Phase Composition of Silica Fume—Portland Cement Systems Formed under Hydrothermal Curing Evaluated by FTIR, XRD, and TGA DOI: 10.3390/ma14112786
• Silicon (Si) 置信度 1.0

  “32 112 SiO-H respectively.21-25 groups and isolated external groups, HB0.6 63 83 136 cm(cid:3)1 HB2.0 163 185 242 The band at 3610 is commonly assigned to the bridging (Si-(OH)-Al), hydroxyl groups which cause strong Brønsted”

  Engineering the porosity and acidity of H-Beta zeolite by dealumination for the production of 2-ethylanthraquinone via 2-(4′-ethylbenzoyl)benzoic acid dehydration DOI: 10.1039/c7ra13576a
• Silicon (Si) 置信度 1.0

  “The component at 3610 cm-1 is due to Si(OH)Al groups and exhibit Brønsted acidity.”

  Hydrogenating activity of Pt/zeolite catalysts focusing acid support and metal dispersion influence DOI: 10.1016/j.apcata.2015.03.027
• Bromine 置信度 1.0

  “All samples The observed decrease in intensity for the band at 3610 which is characteristic of Brønsted acid sites, agrees well with the values for the exchange degree calculated on the were preliminary evacuated at 400 °C.”

  Mihaylov 等 - 2022 - Purification of Hydrogen from CO with CuZSM-5 Ads DOI: 10.3390/molecules27010096
• Alkyl C-H 置信度 1.0

  “It was found that the OH stretch cm-1 cm-1, cm-1 cmshifted to 3610 the C-H stretchat 2960 shifted to 2800 at 3600 1,”

  Sharma 和 Sharma - 2019 - DOI: 10.4152/pea.201901001
• Silicon (Si) 置信度 1.0

  “As shown in Figure 4c, the large peak at 3610 is associated with the framework Si(OH)Al structure, which is ascribed to Brønsted acid groups.”

  Relationship between Acidity and Activity on Propane Conversion over Metal-Modified HZSM-5 Catalysts DOI: 10.3390/catal11101138