What absorbs at 707 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 707 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.

Penetapan kumpulan berfungsi yang mungkin

Pemeringkatan mencerminkan bukti literatur terkumpul, bukan satu peraturan berwibawa. Sentiasa sahkan terhadap konteks sampel anda.

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 707 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.

Literatur di sebalik penetapan ini

• Carbohydrate keyakinan 1.0

  “cm-1 appeared at 1515.47 In the sludge, there was also a peak at 706.52 attributed to crystalline 1β polymorph cellulose from pulp [17].”

  Hidayani 等 - 2022 - Acoustic and Mechanical Properties of Polystyrene DOI: 10.37358/Mat.Plast.1964
• S s keyakinan 1.0

  “LLM confirmed rule peak-group candidate”

  Tasci 等 - 2016 - Determination of alliin and allicin in the plant o DOI: 10.17660/ActaHortic.2016.1143.19
• Metal oxygen keyakinan 1.0

  “LLM confirmed rule peak-group candidate”

  Crocella 等 - 2012 - On the Role of Morphology of CoFeO4 Spinel in Meth DOI: 10.1021/jp304355d
• Metal oxygen keyakinan 1.0

  “300×g 25°C, minutes at at decanted into PBS, and then Cu-Ti-O has a metal-oxygen stretching vibration of 707, 587, dissolved in 1mL 70 percent ethanol (ice cold).”

  Elderdery 等 - 2022 - CuO-TiO2-Chitosan-Berbamine Nanocomposites Induce DOI: 10.1155/2022/9602725
• Alkene (C=C) keyakinan 1.0

  “cm-1 Moreover, the peak at 1269.04 represents the C-O stretch of the carboxylic acid group cm-1 attached to the benzene ring, while the peak at 706.59 shows C=C stretching of”

  Biodegradation of Azo Dye Methyl Red by Pseudomonas aeruginosa: Optimization of Process Conditions DOI: 10.3390/ijerph19169962
• keyakinan 1.0

  “11(b)], the contents of Fe, O, Ca, C and Bouanis shows that the peak at BE 706.65 eV approx.”

  Effectiveness Protection Performance of an Internal Blending Organic Corrosion Inhibitor for Carbon Steel in Chloride Contaminated Simulated Concrete Pore Solution DOI: 10.3151/jact.18.116
• keyakinan 0.8

  “Explicit assignment in text.”

  Phytochemical screening, polyphenols, flavonoids and tannin content, antioxidant activities and FTIR characterization of Marrubium vulgare L. from 2 different localities of Northeast of Morocco DOI: 10.1016/j.heliyon.2020.e05609