What absorbs at 1266 cm⁻¹ in an FTIR spectrum?
A band near 1266 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 1266 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) | 6 | 5 | 1.0 |
| Methacrylate | 6 | 5 | 1.0 |
| Acetate | 6 | 5 | 1.0 |
| C-O single bond | 5 | 4 | 1.0 |
| Hydroxyl (O-H) | 4 | 4 | 1.0 |
| Carboxyl (COOH) | 3 | 3 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| Amide | 3 | 3 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Lignin | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Oxygen heterocycle | 1 | 1 | 1.0 |
| C c single bond | 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 |
|---|---|---|---|
| plasma | 1266, 1656, 1650 | 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 1266 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
-
C c single bond keyakinan 1.0
“In the DCNP, the bands observed in IR at 1468, 1340, 1304, and in IR and 1348, 1569cm(cid:2)1 cm(cid:2)1 1635 and 1309 and 1183 has been assigned to C-C stretching and in in Raman for DCNP and the band observed 1266cm(cid:2)1”
Arivazhagan 和 Rexalin - 2013 - Vibrational spectra, UV-vis spectral analysis and DOI: 10.1016/j.saa.2013.01.029 -
Hydroxyl (O-H) keyakinan 1.0
“1266cm-1 ν corresponds to the phenolic implies that [23] W.William,OrganicSpectroscopy,thirded.,ELBS,Hampshire,1991 C-O (Chapter 2).”
Das 等 - 2004 - Kinetics and adsorption behaviour of salicylate on DOI: 10.1016/j.colsurfa.2004.02.010 -
Amide keyakinan 1.0
“amide I vibrations were placed at 1266 1544 and 1655 Symmetric as well as”
Depciuch 等 - 2022 - EFFECT OF HIGH BLOOD CORTISOL CONCENTRATION ON THE DOI: 10.21203/rs.3.rs-228476/v1 -
Oxygen heterocycle keyakinan 1.0
“LLM confirmed rule peak-group candidate”
Wang 和 Wang - 2006 - Adsorption characteristics of metal complexes by c DOI: 10.1016/j.reactfunctpolym.2005.08.011 -
Aromatic ring keyakinan 1.0
“The peak at 1568 cm-1 was linked to the quinoid ring's (C=C) stretching The characteristic peak was observed at 1266 after the addition of 5% of the”
Synthesis, Characterization, and Antibacterial Potential of Poly(o-anisidine)/BaSO4 Nanocomposites with Enhanced Electrical Conductivity DOI: 10.3390/pr10091878 -
Hydroxyl (O-H) keyakinan 1.0
“Group Compound Class α, β-unsaturated 1622 C=C stretching ketone 1403 O-H bending carboxylic acid 3425 O-H stretching alcohol 1266”
The Antifungal Properties of Tamarix aphylla Extract against Some Plant Pathogenic Fungi DOI: 10.3390/microorganisms11010127 -
Carboxyl (COOH) keyakinan 1.0
“In addition, the presence of characteristic bands at 1692 cm-1, 1530 cm-1, 1266 cm-1, and 724 cm-1 in the GA Raman spectrum Molecules2022,27,279 8of17 (Figure 2b) can be related to the carboxylic group in the non-polymerized molecule.”
Vibrational Study (Raman, SERS, and IR) of Plant Gallnut Polyphenols Related to the Fabrication of Iron Gall Inks DOI: 10.3390/molecules27010279 -
Carbonyl (C=O) keyakinan 1.0
“ing vibration), 2951 2930 2872 1467 (aliphatic C-H vibrations), bration), 2951 cm-1, 2930 cm-1, 2872 cm-1, 1467 cm-1 (aliphatic C-H vibrations), 1695 cm-1 cm-1 cm-1, cm-1 1695 (C=O ester vibration), 1266 and 1162 (C-O-C ester and lactone (C”
Preformulation Studies of Ezetimibe-Simvastatin Solid Dispersions in the Development of Fixed-Dose Combinations DOI: 10.3390/pharmaceutics14050912
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.