What absorbs at 2359 cm⁻¹ in an FTIR spectrum?
A band near 2359 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 7 cited sources
Quick answer
A band near 2359 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.
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Carbon dioxide | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Thiol | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Possible materials
| Материал | Поддерживающие пики | Overlapping groups | Цитируемые источники |
|---|---|---|---|
| nanotubes | 2359, 1735, 1630 | Alkyl C-H, Methacrylate, Methoxy (OCH3) | 1 |
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 2359 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.
Литература, лежащая в основе этих назначений
-
Alkyl C-H достоверность 1,0
“The band at 2359 was due to the C-H stretching dye by PP-ZnONFs were shown in Fig.”
Synthesis of photocatalytic zinc oxide nanoflowers using Peltophorum pterocarpum pod extract and their characterization DOI: 10.1007/s13204-021-01919-z -
Carbon dioxide достоверность 1,0
“LLM confirmed rule peak-group candidate”
Fedorkova 等 - 2018 - Synthesis and Characterization of Porous SulfurMW DOI: 10.20964/2018.01.67 -
Alkyl C-H достоверность 1,0
“5 cm(cid:1)1 -C-H -Sresponding to stretching vibration, 2359 for cm(cid:1)1 cm(cid:1)1 -SO stretch, 1236 and 1103 for the 3H of the SPSF”
Fabricating PES/SPSF membrane via reverse thermally induced phase separation (RTIPS) process to enhance permeability and hydrophilicity DOI: 10.1039/c9ra05707b -
Carboxyl (COOH) достоверность 1,0
“LLM confirmed rule peak-group candidate”
Pitchai 等 - 2014 - Study on the improvement of hydrophilic character DOI: 10.2478/pjct-2014-0064 -
Carbon dioxide достоверность 1,0
“Bands cm-1 cm-1 at 2359 (due to adsorbed CO 2), at 2322 (CH 3CN adsorbed on very cm-1 cm-1 strong Lewis acid sites), at 2218 (Ti - NCO) and at 2117 (CN (a))”
Adsorption of acetonitrile and its reaction with oxygen on TiO<Subscript>2</Subscript>-supported Au — Rh bimetallic catalysts DOI: 10.1007/s11144-007-5120-6 -
C-S single bond достоверность 1,0
“caused an adsorption band around in C-S-H gel, time (min) time (min) 2359cm-1 and the peaks around 1488 and are related to”
Yousefi 等 - 2021 - Fabrication and Characterization of a Nanofast Cem DOI: 10.1155/2021/7343147 -
Acetate достоверность 1,0
“of the cm-1 Vibration Peak position, vibration assignments Hydrogen chloride H-Cl asymmetric stretching 3150-2600 Saturated hydrocarbon C-H stretching 2935 Plasticizer (ester group) C-O-C symmetric stretching 1120 C-O-C asymmetric stretchin”
Zhao 等 - 2022 - Experimental investigation and numerical modeling DOI: 10.1007/s10973-022-11723-8
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