What absorbs at 1212 cm⁻¹ in an FTIR spectrum?
A band near 1212 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 1212 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 |
|---|---|---|---|
| Methoxy (OCH3) | 4 | 4 | 1.0 |
| Methacrylate | 4 | 4 | 1.0 |
| C-O single bond | 4 | 4 | 1.0 |
| Acetate | 4 | 4 | 1.0 |
| Amide | 3 | 3 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 1 | 1.0 |
| Fluorine (C-F) | 2 | 1 | 1.0 |
| C c single bond | 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 |
| Aromatic ring | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Borate | 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 |
|---|---|---|---|
| polypropylene | 1212, 1030, 1600 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| polyaniline | 1212, 1565, 1570 | Methacrylate, Acetate | 1 |
| copolymer | 1212, 2921, 1540 | Methacrylate, Acetate | 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 1212 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
“B-O bond stretching of tetrahedral BO units 4 ~1050 Stretching vibrations of tetrahedral BO units 4 Stretching vibrations of V=O bonds ~1212, ~1276, ~1387 Asymmetric stretching vibrations of B-O bond of trigonal BO units 3”
Synthesis, thermal and spectroscopic characterization of lithium bismuth borate glasses containing mixed transition metal ions DOI: 10.13036/17533562.57.3.018 -
Alkyl C-H keyakinan 1.0
“LLM confirmed rule peak-group candidate”
Chen 等 - 2015 - Processing and characterization of electrospun tra DOI: 10.1515/polyeng-2014-0124 -
Amide keyakinan 1.0
“Some of the referred absorptions can be unambiguously the C-N-C stretching at 1212 cm-1 [27,28].”
An Electrochemical Study on the Copolymer Formed from Piperazine and Aniline Monomers DOI: 10.3390/ma11061012 -
keyakinan 1.0
“Characteristic absorption bands have also been observed for raw EZT related to acteristic absorption bands have also been observed for raw EZT related to O-H stretching cm-1 cm-1, β-lactam O-H stretching vibrations at 3430 and 3265 C=O stre”
Preformulation Studies of Ezetimibe-Simvastatin Solid Dispersions in the Development of Fixed-Dose Combinations DOI: 10.3390/pharmaceutics14050912 -
Acetate keyakinan 1.0
“Finally, at 1212 3 there is a band of the phosphite group (C-O-P.”
Valoration of the Synthetic Antioxidant Tris-(Diterbutyl-Phenol)-Phosphite (Irgafos P-168) from Industrial Wastewater and Application in Polypropylene Matrices to Minimize Its Thermal Degradation DOI: 10.3390/molecules28073163 -
Amide keyakinan 1.0
“1212 cm-1 (C-N stretching vibration mode in benzenoid ring system) and 1315 cm-1(C-N stretching vibration of secondary aromatic amine).”
Kamarudin 等 - 2018 - Adsorption of Copper Ion using Acrylic Acid-g-Poly DOI: 10.1088/1755-1315/140/1/012022 -
Acetate keyakinan 1.0
“Signals at 736 cm-1, 1212 cm-1 and 1047 cm-1 corresponded to 1047 and 900 Signals at 736 1212 and 1047 corresponded to -C=O, -C-C-Oand -C-O groups, respectively, representing the characteristics of CTA -C=O, -C-C-Oand -C-O groups, respectiv”
Membrane Fouling Behavior of Forward Osmosis for FruitJuice Concentration DOI: 10.3390/membranes11080611 -
Acetate keyakinan 1.0
“The peak at 1212.42 also assigns to the C-O-C symmetric stretching vibration, and cm-1 vibration in (BX)2.”
Study of the Effect of Sodium Sulfide as a Selective Depressor in the Separation of Chalcopyrite and Molybdenite DOI: 10.3390/min7040051
Ada spektrum dengan jalur ini?
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