What absorbs at 1448 cm⁻¹ in an FTIR spectrum?
A band near 1448 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 1448 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 |
|---|---|---|---|
| Alkyl C-H | 10 | 9 | 1.0 |
| Amide | 4 | 3 | 1.0 |
| Methyl | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| Secondary amine | 3 | 2 | 1.0 |
| C n single bond | 3 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Lipid | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Alkene (C=C) | 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 |
|---|---|---|---|
| rGO | 1448, 2358, 2930 | Acetate, Alkyl C-H, Amide | 2 |
| PVA | 1448, 1660, 2930 | Alkyl C-H, Acetate, Amide | 1 |
| cellulose | 1448, 1735, 1650 | Alkyl C-H, Acetate, Amide | 1 |
| hemicellulose | 1448, 1730, 897 | Alkyl C-H, Acetate, Amide | 1 |
| Nanotubes | 1448, 1735, 1630 | Alkyl C-H, Acetate | 1 |
| GO | 1448, 1720, 1182 | Acetate, Alkyl C-H, Amide | 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 1448 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
-
Acetate keyakinan 1.0
“LLM confirmed rule peak-group candidate”
Cristian 等 - 2015 - Removal of zinc ions from model wastewater system DOI: 10.1016/j.jwpe.2015.08.001 -
Amide keyakinan 1.0
“Including cm-1 cm-1 the peak corresponding to amide II, two peaks at 1448 and 1078 are similar to the peaks at 1446 and”
Analysis of the ex-vivo transformation of semen, saliva and urine as they dry out using ATR-FTIR spectroscopy and chemometric approach DOI: 10.1038/s41598-021-91009-5 -
Alkyl C-H keyakinan 1.0
“The FT-IR peak at 2950 cm-1 represents asymmetric C-H stretching of methyl (CH 3) groups whereas the peak at 1448 is attributed to bending of methylene groups and both of these peaks were of higher intensity in acute serum samples.”
Lymphatic filarial serum proteome profiling for identification and characterization of diagnostic biomarkers DOI: 10.1371/journal. -
Alkyl C-H keyakinan 1.0
“cm-1 The peaks centered at 1448 and 1156 in the PVA spectrum are originated from the stretching vibrations of C-H and O-H, respectively, revealing the PVA content cm-1 in the nanofibers.”
Investigation of chemical bonding and electronic network of rGO/PANI/PVA electrospun nanofiber DOI: 10.1007/s00289-020-03442-7 -
Alkyl C-H keyakinan 1.0
“The hydrocarbon characteristics absorption peaks at 1662 cm-1, 1448 cm-1, are shown in Figure 3.”
Potency of Urea-Treated Halloysite Nanotubes for the Simultaneous Boosting of Mechanical Properties and Crystallization of Epoxidized Natural Rubber Composites DOI: 10.3390/polym13183068 -
Alkene (C=C) keyakinan 1.0
“The important absorption peaks indicating stretching vibrations of C=C bonds, bending vibrations of CH2 and CH3 groups, and out of plane deformation of =C-H groups were found at 1662 cm-1, 1448 cm-1 and 1375 cm-1, and 837 cm-1 respectively.”
Selectively Etched Halloysite Nanotubes as Performance Booster of Epoxidized Natural Rubber Composites DOI: 10.3390/polym13203536 -
Amide keyakinan 1.0
“7b), while cm1 cm1 the 1448 (N-C-N asymmetric stretching) and the 1247 peak (C-N stretching, amine) can be linked to the urea byproduct(Piasek Z.”
Azrak 等 - 2021 - Controlled Dispersion and Setting of Cellulose Nan DOI: 10.21203/rs.3.rs-376512/v1 -
Alkyl C-H keyakinan 1.0
“Bands of methyl vibrations occur near 1448 Similar to the carbonyl bands of PET and PC, an IR band of”
Optical photothermal infrared spectroscopy with simultaneously acquired Raman spectroscopy for two-dimensional microplastic identification DOI: 10.1038/s41598-022-23318-2
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.