What absorbs at 1880 cm⁻¹ in an FTIR spectrum?
A band near 1880 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 7 cited sources
Jawapan pantas
A band near 1880 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 |
|---|---|---|---|
| Methacrylate | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 0.9 |
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 |
|---|---|---|---|
| CuO | 1880, 453, 1000 | Methacrylate, Acetate, Carboxyl (COOH) | 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 1880 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
-
Carboxyl (COOH) keyakinan 1.0
“These include changes in the 2O of a broad band around 1880 due to free ance in D cm-1 carboxylic acid region (see below), negative bands 1750 DCN (23).”
Rich 和 Breton - 2001 - FTIR studies of the CO and cyanide adducts of full DOI: 10.1021/bi0027332 -
Acetate keyakinan 1.0
“FTIR spectral peaks (1087 demonstrate the existence of bands associated with cm-1), cm-1), amide N-H stretching (3444 alkane C-H stretching (2926 anhydride C=O cm-1), bending (1880 and C-O stretch [39].”
Phytoconstituents Assisted Biofabrication of Copper Oxide Nanoparticles and Their Antiplasmodial, and Antilarval Efficacy: A Novel Approach for the Control of Parasites DOI: 10.3390/molecules27238269 -
keyakinan 1.0
“cm-1 the presence of CO, whereas the ~1880 and ~1863 bands lose a large fraction of their intensities due to the formation of Pd(II)(CO)(NO) mixed ligand complex upon exposure to CO.”
The superior hydrothermal stability of Pd/SSZ-39 in low temperature passive NOx adsorption (PNA) and methane combustion DOI: 10.1016/j.jcat.2010.07.031. -
Acetate keyakinan 1.0
“cm-1 The band located at 1880 is assigned to C=O stretching vibration, while the bands of cm-1 cm-1 1500 and respectively 1360 correspond to C-O vibration.”
LA‐H‐Zeolites Efficient Catalysts For Acetic Acid Ketonic Decarboxylation and Esterification DOI: 10.1002/jctb.6732 -
Alkyl C-H keyakinan 1.0
“cm-1 The absorption band at 1880 is off-plane due to the C-H deformation.”
Naseriyeh 等 - 2022 - Preparation of liposomal hydrogel containing Calen DOI: 10.14715/cmb/2022.68.11.1 -
Aromatic ring keyakinan 0.9
“Explicit assignment.”
Sedimentology and Paleodepositional Environment of the Early-Middle Miocene Tanjong Formation, Southeast Sabah: Evidence from Bulk Geochemistry and Palynology Analyses DOI: 10.3390/min13040494 -
keyakinan 0.8
“Text: 'peak at 1880 cm-1' and 'Ge-H bulk band gaps'”
Soukup 等 - 2004 - Deposition of high quality amorphous silicon, germ DOI: 10.1016/j.surfcoat.2003.08.006
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.