What absorbs at 1284 cm⁻¹ in an FTIR spectrum?
A band near 1284 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 8 cited sources
Quick answer
A band near 1284 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.
可能性のある官能基アサイン
| 官能基 | 裏付け事実 | 引用元 | 最高信頼度 |
|---|---|---|---|
| Amide | 4 | 3 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。
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 1284 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.
これらのアサインの根拠となる文献
-
Amide 信頼度 1.0
“Moreover, (C-N) of stretching frequencies has been cm-1 assigned at 1284 with strong absorption.”
Mohamad 等 - 2017 - Synthesis and Characterization of Methyl 4-(4-Amin DOI: 10.1063/1.5002299 -
Alkyl C-H 信頼度 1.0
“The weak bands at 1284, 1264, cm(cid:2)1can and 1228 be attributed to the CH wagging, followed by a band at 1172 2 cm(cid:2)1, which is related to the ring deformation.”
Synthesis, crystal structure, and characterization of cyclohexylammonium tetraisothiocyanatocobaltate(II): A single-source precursor for cobalt sulfide and oxide nanostructures DOI: 10.1016/j.heliyon.2019. -
Protein 信頼度 1.0
“LLM confirmed rule peak-group candidate”
Detection of Human Cholangiocarcinoma Markers in Serum Using Infrared Spectroscopy DOI: 10.3390/cancers13205109 -
信頼度 1.0
“254 Theoretical and Experimental Spectroscopic Study on 2-Chloro-3-(substituted-phenylamino)-1,4-naphthoquinone Derivatives cm-1 in Figure 7 was classified as the region associated still presents intense bands at 1284 and 1130 that are with”
Dias 等 - 2022 - Theoretical and Experimental Spectroscopic Study o DOI: 10.21577/0103-5053.20220104 -
C-O single bond 信頼度 1.0
“2 2 Characteristic bands for p-aminobenzoic acid (spectrum h) are found at 1599.4 cm-1 (NH2 scissoring cm-1 p-aminobenzoic Characteristic bands for acid (spectrum h) are found at 1599.4 (NH scissoring 2 vibration) and 1283.9 cm-1 (C-OH stre”
Garbacz 和 Wesolowski - 2018 - DSC, FTIR and Raman Spectroscopy Coupled with Mult DOI: 10.3390/molecules23092136 -
C-O single bond 信頼度 1.0
“Compared to the cm-1 cm-1 spectrum of PA, the appearance of new bands at ~1720 (C=O, ester), ~1650 cm-1 A (C=C, aliphatic), and 1284 (ester C-O stretching) of all three MAPAs is attributed to”
Methacrylate-functionalized proanthocyanidins as novel polymerizable collagen cross-linkers – Part 1: efficacy in dentin collagen bio-stabilization and cross-linking DOI: 10.1016/j.dental.2021.04.006. -
Amide 信頼度 1.0
“profile (1204, 1234, 1244, 1284 and 1342 The higher absorption in amide III peaks (1204, 1234 cm-1) and 1284 may be explained by the remodeling of extracellular matrix with modifications of secondary structure of the collagen fibers.”
Moreau 等 - 2020 - Analysis of Hepatic Fibrosis Characteristics in Ci DOI: 10.3390/molecules25184092 -
Aromatic ring 信頼度 1.0
“cm(cid:1)1 C-N stretching.63 The band at 1340 arises due to The C-H deformation vibration of (aromatic) is revealed by the 2.8 Desorption and reuse experiments cm(cid:1)1 cm(cid:1)1.63 absorption bands peaking at 1284 and 1121 The Unported”
Assessment of ampicillin removal efficiency from aqueous solution by polydopamine/zirconium(iv) iodate: optimization by response surface methodology DOI: 10.1039/d0ra02061c
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