What absorbs at 2010 cm⁻¹ in an FTIR spectrum?
A band near 2010 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 2010 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 | 3 | 2 | 1.0 |
| Adsorbed carbon monoxide | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Nitrile | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Silicon hydride | 1 | 1 | 0.5 |
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 |
|---|---|---|---|
| lignin | 2010, 1035, 1510 | Alkyl C-H | 1 |
| CO | 2010, 1670, 1620 | Adsorbed carbon monoxide, Alkyl C-H | 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 2010 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
-
Alkyl C-H keyakinan 1.0
“The bands located at ~2890 ~2010 cm-1 cm-1 and ~1640 are due to the stretching vibration of C-H, and CH groups, associated”
Oxygen vacancies and F+ centre tailored room temperature ferromagnetic properties of CeO2 nanoparticles with Pr doping concentrations and annealing in hydrogen environment DOI: 10.1016/j.jallcom.2020.156079 -
keyakinan 1.0
“medium without fungi showed a strong peak broadening at cm-1, 3,270-3,335 indicating the overlap of N-H and O-Hrelated peaks (Oprea, 2010).”
Khruengsai 等 - 2022 - Biodegradation of Polyester Polyurethane by Embarr DOI: 10.3389/fmicb.2022.874842 -
C c single bond keyakinan 1.0
“1 illustrates the multispectrum fit region from 2010 moment for the vibrational band and is the non-rigid rotor FZ[1Cc cmK1 2m2Cc 3m3)], 1mCc c c to 2250 factor defined by where 1, covering both the P and R branch lines (in our 2 0Z”
Mantz 等 - 2005 - A multispectrum analysis of widths and shifts in t DOI: 10.1016/j.molstruc.2004.11.094 -
C c single bond keyakinan 1.0
“Appearance of new peaks at cm(cid:3)1 due to C-C appearance of shoulder peak at 2010 cm(cid:3)1 and disappearance of peaks at 2010, 767 and 1556 stretching of PEO.”
Influence of high and low dielectric constant plasticizers on the ion transport properties of PEO: NH4HF2 polymer electrolytes DOI: 10.1177/0954008319894043 -
Adsorbed carbon monoxide keyakinan 1.0
“The intensity of the 2010 band increases after annealing the sample to 165 K and concomitant desorption of part of the adsorbed CO.”
Abbet 等 - 2001 - Identification of defect sites on MgO(100) thin fi DOI: 10.1021/ja0157651 -
keyakinan 1.0
“This band shows a shoulder at 2010 assigned by Bazin et al.”
Upgrading the PtCu intermetallic compounds: The role of Pt and Cu in the alloy DOI: 10.1016/j.cattod.2019.11.026 -
keyakinan 1.0
“Deformation of the C-H linkages in the methyl group of O-acetyl moieties Hemicellulose (Mohebby, 2010) 1230-1235 C=O/C-O linkages stretching vibrations (Mohebby, 2010) Hemicellulose”
Dinant 等 - 2019 - Synchrotron FTIR and Raman spectroscopy provide un DOI: 10.1093/jxb/ery396 -
Nitrile keyakinan 1.0
“One can also notice that the C 2H tal columns, respectively, as measured by IASI and averaged 2 and HCN peaks are higher in 2010.”
Duflot 等 - 2015 - Acetylene (C2H2) and hydrogen cyanide (HCN) from I DOI: 10.5194/acp-15-10509-2015
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.