What absorbs at 662 cm⁻¹ in an FTIR spectrum?
A band near 662 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 662 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 | 3 | 3 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Metal oxygen | 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 |
|---|---|---|---|
| cellulose | 662, 1735, 1650 | Methacrylate, C-O single bond, Methoxy (OCH3) | 1 |
| collagen | 662, 1408, 1660 | Methacrylate, Methoxy (OCH3), C-O single bond | 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 662 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
-
Metal oxygen keyakinan 1.0
“FTIR spectrum cm(cid:1)1 of SnQ shows band at 662 and a strong one at 564 which are Sn-O Sn-OH due to stretching and respectively [39,40].”
Shajira 等 - 2015 - Sunlight assisted photodegradation by tin oxide qu DOI: 10.1016/j.jpcs.2015.09.003 -
Amide keyakinan 1.0
“(ii) the band at 662 assigned to the combination of stability.38 chemical behavior and In particular, NaBF was used ν(C-N) and δ ring modes;”
Dani 等 - 2015 - Design of high surface area poly(ionic liquid)s to DOI: 10.1039/c5ta00272a -
C-O single bond keyakinan 1.0
“The band approximately at 662cm-1 mately at referred to the C-OH of plane bending mode.”
Investigate the role of fungal communities associated with a historical manuscript from the 17th century in biodegradation DOI: 10.1038/s41529-022-00296-4 -
Aromatic ring keyakinan 1.0
“The band around 662 cm-1 may be assigned to the -CHbonding of aromatic groups [32].”
Impact and Tensile Properties of Polyester Nanocomposites Reinforced with Conifer Fiber Cellulose Nanocrystal:A Previous Study Extension DOI: 10.3390/polym13111878 -
C-O single bond keyakinan 1.0
“The little peaks at approximately 662 C-OH bending (Fan et al.”
Chemical functional groups of extractives, cellulose and lignin extracted from native Leucaena leucocephala bark DOI: 10.1007/s00226-020-01258-2 -
Acetate keyakinan 1.0
“sorption, the weak peaks at wavenumber 662 cm-1 (the expected bond is O 1CO 2), after CO 2 cm-1 cm-1 C-O+C···O), strong peaks at wavenumber 1007 (the expected bond is 1402 (the and 840 cm-1 (the expected bond is CO 3) are attributed to carb”
CO2 Sorption and Regeneration Properties of K2CO3/Al2O3-Based Sorbent at High Pressure and Moderate Temperature DOI: 10.3390/app12062989 -
Phosphate (PO4) keyakinan 1.0
“In the spectrum of BG: P-O wagging is centered at 456 and P-O scissoring is centered at 662 cm-1 cm-1.”
Molecular and biological activities of metal oxide-modified bioactive glass DOI: 10.1038/s41598-023-37017-z -
keyakinan 0.9
“Explicit assignment: 'and to maghemite (662 cm-1)'”
Desferrioxamine B: Investigating the Efficacy of Hydrogels and Ethanol Gels for Removing Akaganeite and Maghemite from Dry Wooden Substrates DOI: 10.3390/f14020247
Ada spektrum dengan jalur ini?
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