What absorbs at 1478 cm⁻¹ in an FTIR spectrum?
A band near 1478 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 1478 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 | 8 | 8 | 1.0 |
| Amide | 4 | 4 | 1.0 |
| Secondary amine | 3 | 3 | 1.0 |
| C n single bond | 3 | 3 | 1.0 |
| Aromatic ring | 3 | 3 | 1.0 |
| N h | 2 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Nitrogen heterocycle | 1 | 1 | 0.9 |
| N-O bond | 1 | 0 | 1.0 |
| Nitrate | 1 | 0 | 0.7 |
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 |
|---|---|---|---|
| PANI | 1478, 2930, 1300 | Alkyl C-H, Secondary amine, Amide | 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 1478 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
-
Alkyl C-H keyakinan 1.0
“Vibrational bands at 2935 cm-1 cm-1 and 2880 referred to a C-H stretching, 1478 to the CH bending of an alkyl”
Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569 -
Ester keyakinan 1.0
“appear at 1,560-1,520 The differential signal at e 1478 cm-1 1,725/1,719 is probably attributed to the 10a-ester”
Takano 等 - 2008 - Herbicide effect on the hydrogen-bonding interacti DOI: 10.1007/s11120-008-9302-5 -
C-O single bond keyakinan 1.0
“The ficient and variables and cm-1 represent -OH, C-OH and peaks at 1478, 1024 and 803 the interpretation of the experimental results are explained”
Bio-sorption of a bi-solute system of copper and lead ions onto banana peels: characterization and optimization DOI: 10.1007/s40201-021-00632-x -
Alkyl C-H keyakinan 1.0
“peaks of the C=C skeleton and C-H stretching vibration of CH2 and CH3 induced by arocm-1 However, several distinctive peaks at 1478, 2852, and 2922 were characteristic peaks matic groups of TC [46,47].”
Hanh 等 - 2023 - Adsorption of Tetracycline by Magnetic Mesoporous DOI: 10.3390/su15064727 -
Aromatic ring keyakinan 1.0
“cm-1 is related to the N=Q=N stretching cated at 1560 vibration in the quinoid structure, and the peak at cm-1 1478 corresponds to the N=B=N vibration of the benzenoid structure.”
He 等 - 2020 - Flexible fabric gas sensors based on PANIWO(3)p-n DOI: 10.1007/s40843-020-1364-4 -
Aromatic ring keyakinan 1.0
“cm-1 Aromatic C-C stretching Vibration of benzene: 1465-1490 cm-1 The aromatic C-C vibration of benzene shows a peak at 1478.24 with a transmittance of 80.26% (Fig.14) and shows a small shift toward a higher wavenumber with an increasing mo”
Hema 等 - 2022 - Structural and vibrational study of molecular inte DOI: 10.21203/rs.3.rs-649250/v1 -
Aromatic ring keyakinan 1.0
“The weight loss of 12.7%, between 30 and 350 is (C]C vibrations at about 1478 aromatic stretching) and about attributed to physically adsorbed water and the alkyl thiol Access cm(cid:1)1 (C-H 875 aromatic out-of-plane), due to the presence”
Synthesis and characterization of a new reusable calix[4]arene-bonded silica gel sorbent for antidiabetic drugs DOI: 10.1039/d2ra04530c -
Alkyl C-H keyakinan 1.0
“This]CHregionisclearlyshowninFigure4(a).Beeswax shellac wax shows an additional well-defined narrow C=O and band (acids/ketones) with the maximum being positioned at shellac wax spectra show two close narrow maxima both of 1735cm-1 CH2 scis”
Invernizzi 等 - 2018 - Mid and Near-Infrared Reflection Spectral Database DOI: 10.1155/2018/7823248
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.