What absorbs at 2866 cm⁻¹ in an FTIR spectrum?
A band near 2866 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
Mabilis na sagot
A band near 2866 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.
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| Alkyl C-H | 11 | 11 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| C c single bond | 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 |
| Hydrogen bond | 1 | 1 | 1.0 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Mga posibleng materyales
| Materyal | Sumusuportang mga peak | Mga overlapping na grupo | Mga nasiping sanggunian |
|---|---|---|---|
| PCL | 2866, 1751, 1724 | Alkyl C-H, Hydroxyl (O-H) | 2 |
| cellulose | 2866, 1735, 1650 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| hemicellulose | 2866, 1730, 897 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| polyurethane | 2866, 2270, 1700 | Alkyl C-H | 1 |
| graphene | 2866, 1720, 2097 | Hydroxyl (O-H) | 1 |
| GO | 2866, 1720, 1182 | Hydroxyl (O-H), Alkyl C-H | 1 |
Ang mga materyales ay ipinapakita lamang kapag ang parehong literatura pool ay sumusuporta sa banda na ito at hindi bababa sa isang karagdagang katangian na tuktok.
Logic ng spectrum
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 2866 cm⁻¹ is usually not enough for material identification by itself.
Paggamit sa totoong mundo
Ang uri ng query na ito ay karaniwan sa pagtukoy ng polymer, screening ng hindi kilalang plastic, pag-troubleshoot ng QC, pag-verify ng recycled na materyal, at pagsusuri ng pagtatalaga ng peak na may suporta ng literatura.
Mga karaniwang pagkakamali
- Pagtrato sa isang nakahiwalay na banda bilang patunay ng isang materyal nang hindi sinusuri ang hindi bababa sa isa o dalawang sumusuportang peak.
- Hindi pinapansin ang overlap: maraming functional group ang maaaring mag-ambag malapit sa parehong wavenumber.
- Pag-laktaw sa pagpapatunay kapag ang mga additives, blends, oxidation, o contamination ay maaaring mag-distort ng spectrum.
Payo sa pagpapatunay
Kapag nananatili ang kalabuan, patunayan ang hypothesis gamit ang DSC, GC-MS, o TGA, lalo na para sa mga blend, degraded na sample, at filled polymers.
Literatura sa likod ng mga pagtatalagang ito
-
Alkyl C-H kumpiyansa 1.0
“cm-1 peaks at 2865.67 and 2918.4 corresponding to stretching vibration of C H bonds in the high frequency area together cm-1 with a sharp peak at 1465.95 corresponding to the bending vibration of C H groups of water molecules adsorbed cm-1”
Production of graphene powder by electrochemical exfoliation of graphite electrodes immersed in aqueous solution DOI: 10.1016/j.ijleo.2016.04.101 -
kumpiyansa 1.0
“Explicit assignment in text”
Lu 和 Mi - 2005 - Characterization of the interfacial interaction be DOI: 10.1021/ma0486896 -
Alkyl C-H kumpiyansa 1.0
“In addition, the presence of the C-H stretching at 2931 cm-1 and 2866 cm-1, C=O urethane linkage [33].”
Self-Healable Supramolecular Vanadium Pentoxide Reinforced Polydimethylsiloxane-Graft- Polyurethane Composites DOI: 10.3390/polym11010041 -
Acetate kumpiyansa 1.0
“cm-1 cm-1, C=O (symmetric), stretching at 1721 at 2866 cm-1, C-O-C stretching C-C and C-O stretching at 1721”
Preparation of electrospun polycaprolactone nanofiber mats loaded with microalgal extracts DOI: 10.1002/elsc.201900009 -
Alkyl C-H kumpiyansa 1.0
“cm-1 C-H asymmetric stretching), 2929 (methylene C-H peak near 122.1 (cid:3)C does not vary with the mass ratio of cm-1 asymmetric stretching), 2866 (methyl and methylene LOV and indicates the temperature of the eutectic reaction: cm-1 C-H”
Gorniak 等 - 2016 - Thermal, spectroscopic and dissolution studies of DOI: 10.1007/s10973-016-5279-z -
Alkyl C-H kumpiyansa 1.0
“cm-1 cm-1 cm-1 bands at 2945 (asym CH stretch), 2866 (sym CH stretch), 1730 (ester C = O 2 2 cm-1 stretch), and 1060-1150 (asym C-O-C stretch) [36].”
Adapalene-loaded poly(#_#x03B5;-caprolactone) microparticles: Physicochemical characterization and in vitro penetration by photoacoustic spectroscopy DOI: 10.1371/journal. -
Alkyl C-H kumpiyansa 1.0
“region arising from C-H stretching of aromatic 2866 and cm-1 compound.”
Antibacterial Potential of Bacterial Cellulose Impregnated with Green Synthesized Silver Nanoparticle Against S. aureus and P. aeruginosa DOI: 10.1007/s00284-023-03182-7 -
Alkyl C-H kumpiyansa 1.0
“The positive band at cm-1 cm-1 2993-2995 and the negative band at 2866 (C-H stretching region) demonstrated the difference between normal colon tissues and polyps in the contributions of various”
Ex Vivo Vibration Spectroscopic Analysis of Colorectal Polyps for the Early Diagnosis of Colorectal Carcinoma DOI: 10.3390/diagnostics11112048
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