What absorbs at 2570 cm⁻¹ in an FTIR spectrum?
A band near 2570 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
Hurtigt svar
A band near 2570 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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Thiol | 5 | 5 | 1,0 |
| Methacrylate | 1 | 1 | 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 |
| Amide | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| PMMA | 2570, 1722, 1383 | Methacrylate, Ester | 1 |
| bio-based | 2570, 1720, 1740 | Methacrylate, Ester | 1 |
| polypyrrole | 2570, 1700, 400 | Methacrylate | 1 |
| epoxy | 2570, 1660, 1735 | Methacrylate | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
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 2570 cm⁻¹ is usually not enough for material identification by itself.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
C-S single bond tillid 1,0
“The 52 53 spectrum of TMPMP exhibits characteristic stretching vibration of S-H and C-S at 2570 and 627 54 55”
Ataei 等 - 2020 - Electrosprayed PMMA microcapsules containing green DOI: 10.1088/1361-665X/ab9754 -
tillid 1,0
“The peak at 2570 is 3 Likewise, we observe a weak band with low peak intensity assigned to the N-H stretching in the NH group.”
Studies of the behavior of reverse nonionic surfactant Pluronic 31R1 in aqueous and Propylammonium acetate (PAAc) ionic liquid solutions DOI: 10.1007/s10965-020-02315-x -
Thiol tillid 1,0
“The spectrum of the thiol 3SH-EU shows a weak band at cm-1 2570 corresponding to the S-H stretching.”
Guzman 等 - 2017 - New bio-based materials obtained by thiol-enethio DOI: 10.1002/pi.5336. -
Thiol tillid 1,0
“One can see cm-1, the complete disappearance of the thiol peak at 2570 accompanied by an appearance of a hydroxyl peak cm-1.”
Konuray 等 - 2017 - Latent curing of epoxy-thiol thermosets DOI: 10.1016/j.polymer.2017.03.064 -
Alkyl C-H tillid 1,0
“Inbothscenarios, cm-1 Polymers 9, 2017, x FOR PEER REVIEW 7 of 14 C≡C, 1 2103, 3274, and 2570 ascribed to the absorptions of C-H in alkynyl groups on [30] and 5, S-H on respectively were not observed on the spectra of the polymers (MIP-NSHs”
Fabrication of Hypericin Imprinted Polymer Nanospheres via Thiol-Yne Click Reaction DOI: 10.3390/polym9100469 -
Acetate tillid 1,0
“Their IR spectra, along with those of monomer crosslinker characteristic absorptions at 1735 and 2570 cm-1 (C=O and S-H) on crosslinker 2 were observed on characteristic absorptions at 1735 and 2570 cm-1 (C=O and S-H) on crosslinker 2 were”
Fabrication of Core-Shell Magnetic Molecularly Imprinted Nanospheres towards Hypericin via Click Polymerization DOI: 10.3390/polym11020313 -
Thiol tillid 1,0
“Moreover, there were no obvious S-H characteristic peaks at 2570 Combined with the existence and -CH2-.”
Zhang 等 - 2020 - Superhydrophobic Polypyrrole-Coated Cigarette Filt DOI: 10.3390/app10061985
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