What absorbs at 1486 cm⁻¹ in an FTIR spectrum?
A band near 1486 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
Jawapan pantas
A band near 1486 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 |
|---|---|---|---|
| Alkyl C-H | 3 | 3 | 1.0 |
| Aromatic ring | 3 | 2 | 1.0 |
| Amide | 3 | 2 | 1.0 |
| N h | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 1 | 1.0 |
| Methacrylate | 2 | 1 | 1.0 |
| Acetate | 2 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Ammonium | 1 | 1 | 0.8 |
| S eq o | 1 | 0 | 1.0 |
| Alkene (C=C) | 1 | 0 | 1.0 |
| Ring structure | 1 | 0 | 1.0 |
| Ketone | 1 | 0 | 1.0 |
| Ester | 1 | 0 | 1.0 |
| Carboxyl (COOH) | 1 | 0 | 1.0 |
| Carbonyl (C=O) | 1 | 0 | 1.0 |
| C-O single bond | 1 | 0 | 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 |
|---|---|---|---|
| ZnO | 1486, 1400, 3430 | Alkyl C-H, Amide | 1 |
| graphene oxide | 1486, 1150, 3400 | Alkyl C-H | 1 |
| Polysulfone | 1486, 1700, 2941 | Alkyl C-H, Amide | 1 |
| polyaniline | 1486, 1565, 1570 | Aromatic ring, Amide, Alkyl C-H | 1 |
| ZnO nanoparticles | 1486, 1219, 1726 | Alkyl C-H, Amide | 1 |
| MCM-41 | 1486, 2170, 1655 | Alkyl C-H, N h | 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 1486 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
-
Amide keyakinan 1.0
“Paper Journal of Materials Chemistry A PANI.Thepeakat1578cm(cid:1)1isforquinonoidringdeformation, band of the PT-conjugated backbone is not observed and cm(cid:1)1 p*-polaron probably it becomes merged with the band of whereas that at 1486”
Das 等 - 2014 - Supramolecular assembly of polythiophene-g-polymet DOI: 10.1039/c4ta01521e -
Alkyl C-H keyakinan 1.0
“The peak at 1486 cm-1 of ODA belongs to the C-H bend, and it moves to 1464 cm-1 in cm-1 cm-1 The bands at 1717 and 1060 corresponding to carboxyl and epoxide were weakened functionalized GO.”
Daud 等 - 2017 - Functionalizing Graphene Oxide with Alkylamine by DOI: 10.3390/nano7060135 -
Aromatic ring keyakinan 1.0
“include much informawith between 800 and 900 the latter band disappeared, and the same behavior tion about deformation of benzenoid rings, which cm(cid:2)1 attributed was observed for the band at 1486 also becomes more salient in all of the”
Enhanced conductivity and fluorescence of polyaniline doped with Eu3+, Tb3+, and Y3+ ions DOI: 10.1002/app.36516 -
Aromatic ring keyakinan 1.0
“266 cm-1 The spectra also exhibited a low-intensity band at 1502 associated with C=C 267 cm-1, vibrations of aromatic rings, bands at 1486 and 1469 associated with CH and CH”
Franca 等 - 2020 - Monitoring diclofenac adsorption by organophilic a DOI: 10.1016/j.envpol.2013.04.012 -
keyakinan 1.0
“cm-1 cm-1 Furthermore, the bands at 1486 and 1630 corresponded to N-H bending modes, cm-1 and the band at 3416 can be attributed to free NH stretching vibrations.”
Hassan 等 - 2021 - Hydroxypropyl Cellulose Loaded with ZnO Nanopartic DOI: 10.3390/ma13020363 -
N-O bond keyakinan 1.0
“Remarkably, the spectra of short exposed wild-type and mutant proteins P A cm-1, both exhibit a positive band at 1486 which was not observed in the long illumination, A cm-1 u whereas the mutant showed no positive band at 1396 (Figure 4).”
Iwata 等 - 2010 - Key Dynamics of Conserved Asparagine in a Cryptoch DOI: 10.1021/bi1009979. -
Alkyl C-H keyakinan 1.0
“Absorbance peaks at 1585, 1504, 1486 and 1107 cm-1 are attributed to the vibrations of δ(-CH 1486 is assigned to the (CH 3) 3) [41].”
One-Step Preparation of Antifouling Polysulfone Ultrafiltration Membranes via Modification by a Cationic Polyelectrolyte Based on Polyacrylamide DOI: 10.3390/polym12051017 -
keyakinan 0.9
“assigned to surfactant”
Romina Serrano 等 - 2018 - Synthesis of ordered mesoporous silica determinat DOI: 10.1590/S1517-707620180002.0465
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.