What absorbs at 2354 cm⁻¹ in an FTIR spectrum?
A band near 2354 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 5 cited sources
Jawapan pantas
A band near 2354 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 | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Methacrylate | 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 |
| Amide | 1 | 1 | 1.0 |
| Acetate | 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 |
|---|---|---|---|
| chitosan | 2354, 1650, 1655 | Alkyl C-H, Methacrylate, Hydroxyl (O-H) | 1 |
| Cellulose | 2354, 1735, 1650 | Alkyl C-H, Methacrylate, Hydroxyl (O-H) | 1 |
| TiO2 | 2354, 1700, 1093 | Hydroxyl (O-H), Alkyl C-H, Methacrylate | 1 |
| silver nanoparticles | 2354, 1636, 1631 | Hydroxyl (O-H), Alkyl C-H, Methacrylate | 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 2354 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
“The strong band at 2354 indicated C=O vibration of carboxylic groups, aldehydes, and ketones, similar to that reported in FTIR analysis of”
Ocimum basilicum-Mediated Synthesis of Silver Nanoparticles Induces Innate Immune Responses against Cucumber Mosaic Virus in Squash DOI: 10.3390/plants11202707 -
Hydroxyl (O-H) keyakinan 1.0
“cm-1 to O-H stretching from water molecules The peak located at 2354 represents the cm-1 A stretching vibration of CH3COO+ groups.”
A facile, sensitive and rapid sensing platform based on CoZnO for detection of fipronil; an environmental toxin. DOI: 10.1002/elan.202000051. -
Alkyl C-H keyakinan 1.0
“The result revealed cm-1, C-H complete reduction in the intensity of SCB bands at 2354 and noncellulosic materials and stretching at 2896”
Senapitakkul 等 - 2020 - Pretreatment of Cellulose from Sugarcane Bagasse w DOI: 10.1021/acsomega.0c03837 -
keyakinan 0.95
“Explicit assignment: '2354 (001-L2)'”
Mino 等 - 2014 - CO2 Capture by TiO2 Anatase Surfaces A Combined D DOI: 10.1021/jp507443k -
keyakinan 0.9
“Explicit assignment in text.”
Biomaterials based on N,N,N -trimethyl chitosan fibers in wound dressing applications DOI: 10.1016/j.ijbiomac.2015.07.037(2015
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.