What absorbs at 1343 cm⁻¹ in an FTIR spectrum?
A band near 1343 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 1343 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 |
|---|---|---|---|
| C-O single bond | 4 | 4 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Borate | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 0.7 |
| Phospholipid | 1 | 1 | 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 |
|---|---|---|---|
| rGO | 1343, 2358, 2930 | Methacrylate, Acetate, C-O single bond | 1 |
| PLA | 1343, 1650, 1073 | Methacrylate, Acetate, Methoxy (OCH3) | 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 1343 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
-
Borate keyakinan 1.0
“The other peaks of pure bending vibrations at 1343 and 1360 (which indicates (O-B-O) LiDFOB salt (Fig.”
Polu 等 - 2015 - Poly(ethylene oxide)-lithium difluoro(oxalato)bora DOI: 10.1007/s11581-015-1474-3 -
Alkyl C-H keyakinan 1.0
“The peaks at 1343 and 1450 are attributed to CH from methylene group.”
Optimization of primary sewage sludge and coal lignite by microwave assisted pyrolysis for the production of bio oil DOI: 10.1080/09593330.2020.1797903 -
Hydroxyl (O-H) keyakinan 1.0
“Moreover, the peak cm-1 cm-1 at 1104 corresponds to the C-O stretching of the C-O-C bond and the peak at 1343 is due to cm-1 the O-H bending of the C-OH group.”
Durazzo 等 - 2018 - Qualitative Analysis of Traditional Italian Dishes DOI: 10.3390/su10114112 -
Acetate keyakinan 1.0
“cm-1, The bands at vibration of C-O, shifted to 1343 and also an intense, broad band at 1281 belongs cm-1 1000-500 are due to vibrational modes of the to C-N functional group.”
Ebadi 等 - 2019 - Synthesis and properties of magnetic nanotheranost DOI: 10.2147/IJN.S214923 -
C-O single bond keyakinan 1.0
“cm-1 cm-1 cm-1 the absorption bands at 1343 to 1419 correspond to C-OH stretching, 2927 C-H absorption bands at 1343 cm-1 to 1419 cm-1 correspond to C-OH stretching, 2927 cm-1 C-H stretching, absorption bands at 1343 cm-1 to 1419 cm-1 corre”
Complex Permittivity and Electromagnetic Interference Shielding Effectiveness of OPEFB Fiber-Polylactic Acid Filled with Reduced Graphene Oxide DOI: 10.3390/ma13204602 -
Phosphate (PO4) keyakinan 1.0
“In organophosphorus layer deposited on iron surface, bands at 1343 and 1023 P=O cm-1, cm-1 cm-1 associated with and P-O-C bonds was observed.”
Maranescu 等 - 2018 - The corrosion inhibitor behavior of iron in saline DOI: 10.1515/pac-2018-0513 -
keyakinan 1.0
“The peak at 1343.2 suggested In the case of FTIR spectra of norfloxacin, prominent for symmetric stretching vibration of the O-C-O group.”
Sahoo 等 - 2012 - FTIR and Raman Spectroscopic Investigations of a N DOI: 10.4103/0975-1483.100017 -
Amide keyakinan 1.0
“1379 is not present in the spectra of and The shoulder observed at in the spectra of samples prepared in mildly acidic and neutral media, assigned to C-N stretching, is cm-1 transformed to a well-defined peak at 1343 and 1347 in the spectra”
Trchova 和 Stejskal - 2011 - Polyaniline The infrared spectroscopy of conducti DOI: 10.1351/PAC-REP-10-02-01
Ada spektrum dengan jalur ini?
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