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
Jawapan pantas
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.
Penetapan kumpulan berfungsi yang mungkin
| Kumpulan berfungsi | Fakta sokongan | Sumber dipetik | Keyakinan tertinggi |
|---|---|---|---|
| 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 |
Pemeringkatan mencerminkan bukti literatur terkumpul, bukan satu peraturan berwibawa. Sentiasa sahkan terhadap konteks sampel anda.
Bahan yang mungkin
| Bahan | Puncak sokongan | Kumpulan bertindih | Sumber dipetik |
|---|---|---|---|
| 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 |
Bahan hanya dipaparkan apabila kumpulan literatur yang sama menyokong jalur ini dan sekurang-kurangnya satu puncak ciri tambahan.
Logik spektrum
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.
Penggunaan dunia sebenar
Jenis pertanyaan ini biasa dalam pengenalpastian polimer, saringan plastik tidak diketahui, penyelesaian masalah QC, pengesahan bahan kitar semula, dan semakan tugasan puncak yang disokong oleh literatur.
Kesilapan biasa
- Menganggap satu jalur terpencil sebagai bukti bahan tanpa memeriksa sekurang-kurangnya satu atau dua puncak sokongan.
- Mengabaikan pertindihan: pelbagai kumpulan berfungsi boleh menyumbang berhampiran nombor gelombang yang sama.
- Melangkau pengesahan apabila bahan tambahan, campuran, pengoksidaan, atau pencemaran boleh memesongkan spektrum.
Nasihat pengesahan
Apabila kekaburan masih ada, sahkan hipotesis dengan DSC, GC-MS, atau TGA, terutamanya untuk campuran, sampel terdegradasi, dan polimer terisi.
Literatur di sebalik penetapan ini
-
C-S single bond keyakinan 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 -
keyakinan 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 keyakinan 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 keyakinan 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 keyakinan 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 keyakinan 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 keyakinan 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
Ada spektrum dengan jalur ini?
Muat naik spektrum FTIR anda dan dapatkan laporan tafsiran penuh — penetapan puncak dengan petikan literatur, padanan perpustakaan, dan rantaian bukti berkadar keyakinan — dalam beberapa saat.