What absorbs at 437 cm⁻¹ in an FTIR spectrum?
A band near 437 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 437 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 |
|---|---|---|---|
| Metal oxygen | 3 | 3 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| Triglyceride | 1 | 1 | 1.0 |
| Fatty acid | 1 | 1 | 1.0 |
| Bromine | 1 | 1 | 1.0 |
| Chlorine | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Metalloid oxygen | 1 | 1 | 0.9 |
| Methoxy (OCH3) | 1 | 0 | 1.0 |
| Methacrylate | 1 | 0 | 1.0 |
| C-O single bond | 1 | 0 | 1.0 |
| Acetate | 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 | 437, 1400, 3430 | Metal oxygen | 3 |
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 437 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
-
keyakinan 1.0
“We have observed six absorption peaks at 437, 917, 2157, 2852, 2925 and cm-1 3749 which are related to Zn-O, Al-N, N-O, Alkaline group, C-H stretching vibration and Zn-Al vibrational modes respectively.”
Enhancement of Al-N co-dopant solubility in ZnO by high temperature thermal annealing DOI: 10.1016/j.ceramint.2018.10.005 -
keyakinan 1.0
“The 437cm-1 E characteristic peak, assigned to the non-polar 2 optical phonon mode, is present for the pure and Mn-doped ZnO thin films, with a similar shape.”
Kharroubi 等 - 2012 - Mn doping effect on the structural properties of Z DOI: 10.1088/0031-8949/86/01/015805 -
keyakinan 1.0
“The peak at around 437 is assigned to sized Mg(OH) prepared using EDA and TEA (Fig.”
Mageshwari 和 Sathyamoorthy - 2012 - Studies on Photocatalytic Performance of MgO Nanop DOI: 10.1007/s12666-011-0106-5 -
keyakinan 1.0
“The Raman bands at 583 and intensity of Raman band at 437 decreased with cm-1 are associated with structural disorders, such as oxygen doping concentration into ZnO that may be attributed to 660 Mn vacancy, the Zn interstitial, impurity ato”
Vinod 等 - 2015 - Quenching and blue shift of UV emission intensity DOI: 10.1016/j.mseb.2014.10.004 -
Silicon (Si) keyakinan 1.0
“437cm-1 phological change observed in the synthesized The band at is related to the Si-O-Si bending geopolymer is due to the dissolution of metakaolin aluvibration.”
El Alouani 等 - 2019 - Preparation, Characterization, and Application of DOI: 10.1155/2019/4212901 -
keyakinan 1.0
“Wefoundthe520cm-1,460cm-1,437cm-1 and417cm-1 cm-1 peakswithinthe300-600 range, due to the presence of C-X bonds (X = halogen: Cl, Br, I), as well as of plane defor-”
Determination of the Conservation State of Some Documents Written on Cellulosic Support in the Poni-Cerntescu Museum, Iași City in Romania DOI: 10.3390/app11188726 -
Fatty acid keyakinan 1.0
“3A shows the FTIR spectra between 4000 and 400 The oil spectrum is characterized 437 by several bands (peaks), mainly attributed to the presence of oleic and linoleic fatty acids, 438 triglycerides and peroxides.”
Kharbach 等 - 2021 - New insights into the Argan oil categories charact DOI: 10.1016/j.talanta.2020.122073 -
Metal oxygen keyakinan 1.0
“[65] assigned the band at 437 cm-1 in silicate structures to Mg-O stretch + O-Si-O”
Zviagina 等 - 2020 - Distinguishing Features and Identification Criteri DOI: 10.3390/min10020153
Ada spektrum dengan jalur ini?
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