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
Snabbt svar
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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| 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 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| collagen | 1284, 1408, 1660 | Amide, Methacrylate, Acetate | 2 |
Material visas endast när samma litteraturpool stöder detta band och minst en ytterligare karakteristisk topp.
Spektrumlogik
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.
Användning i verkligheten
Denna typ av fråga är vanlig inom polymeridentifiering, screening av okänd plast, felsökning av kvalitetskontroll, verifiering av återvunnet material och litteraturstödd toppidentifieringsgranskning.
Vanliga misstag
- Behandla ett isolerat band som bevis på ett material utan att kontrollera minst en eller två stödjande toppar.
- Ignorerar överlapp: flera funktionella grupper kan bidra nära samma vågtal.
- Hoppa över validering när tillsatser, blandningar, oxidation eller föroreningar kan förvränga spektrat.
Verifieringsråd
När oklarhet kvarstår, validera hypotesen med DSC, GC-MS eller TGA, särskilt för blandningar, nedbrutna prover och fyllda polymerer.
Litteratur bakom dessa identifieringar
-
Amide förtroende 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 förtroende 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 förtroende 1,0
“LLM confirmed rule peak-group candidate”
Detection of Human Cholangiocarcinoma Markers in Serum Using Infrared Spectroscopy DOI: 10.3390/cancers13205109 -
förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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
Har du ett spektrum med detta band?
Ladda upp ditt FTIR-spektrum och få en fullständig tolkningsrapport – toppidentifieringar med litteraturhänvisningar, biblioteksmatchningar och en förtroendebedömd beviskedja – på sekunder.