What absorbs at 866 cm⁻¹ in an FTIR spectrum?
A band near 866 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
Hiter odgovor
A band near 866 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.
Možne dodelitve funkcionalnih skupin
| Funkcionalna skupina | Podporna dejstva | Citirani viri | Najvišje zaupanje |
|---|---|---|---|
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| Carbonate | 2 | 2 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 0,9 |
| Hydroxyl (O-H) | 1 | 1 | 0,8 |
| Alkyl C-H | 1 | 0 | 1,0 |
| Carboxyl (COOH) | 1 | 0 | 1,0 |
Razvrstitev odraža zbrane literaturne dokaze, ne enega avtoritativnega pravila. Vedno preverite glede na kontekst vašega vzorca.
Možni materiali
| Material | Podporni vrhovi | Prekrivajoče se skupine | Citirani viri |
|---|---|---|---|
| starch | 866, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 1 |
Materiali so prikazani le, ko ista literaturna podlaga podpira ta pas in vsaj en dodatni karakteristični vrh.
Logika spektra
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 866 cm⁻¹ is usually not enough for material identification by itself.
Uporaba v resničnem svetu
Ta vrsta poizvedbe je pogosta pri identifikaciji polimerov, pregledovanju neznanih plastičnih mas, odpravljanju težav pri QC, preverjanju recikliranih materialov in literaturno podprtem pregledu dodelitev vrhov.
Pogoste napake
- Obravnavanje enega izoliranega pasu kot dokaza o materialu brez preverjanja vsaj enega ali dveh podpornih vrhov.
- Ignoriranje prekrivanja: več funkcionalnih skupin lahko prispeva blizu istega valovnega števila.
- Izpuščanje validacije, ko lahko dodatki, mešanice, oksidacija ali kontaminacija popačijo spekter.
Nasvet za preverjanje
Ko ostaja dvoumnost, potrdite hipotezo z DSC, GC-MS ali TGA, zlasti za mešanice, degradirane vzorce in polnjene polimere.
Literatura za temi dodelitvami
-
Acetate zaupanje 1,0
“The 5 mL freshly obtained hepused corresponds to C O C stretching vibrations from gly866”
Shahid 等 - 2013 - Graft polymerization of guar gum with acryl amide DOI: 10.1016/j.ijbiomac.2013.08.018 -
Carbonate zaupanje 1,0
“The peak at 866 (labeled 3 in Fig, 4I) has been attributed to either Aor B - type carbonate with slightly different orientation, A u”
Carbonate substitution in the mineral component of bone: Discriminating the structural changes, simultaneously imposed by carbonate in A and B sites of apatite DOI: 10.1016/j.jssc.2017.07.025. -
Acetate zaupanje 1,0
“cm-1: bands: peaks below 800 skeletal vibrations of the fructose and OH bending of water, 2929 C-H stretching of inulin, 1654 cm-1: glutenandinulin,3433cm-1:N-HstretchingofglutenandOHstretching glucose pyranose rings, 866 stretching of C-O-”
Pourfarzad 等 - 2015 - Serish inulin and wheat biopolymers interactions i DOI: 10.1007/s13197-015-1939-4 -
Amide zaupanje 1,0
“CLH melting peak was depleted in the thermogram for the cm-1, cm-1 cm-1 1086 (C-N stretching), 866 and bending), 1183 drug loaded PLA and PLGA NPs, indicating the presence of cm-1 (N-H wags) for the CLH-PLGA 2 NPs.”
Enhanced efficacy of clindamycin hydrochloride encapsulated in PLA/PLGA based nanoparticle system for oral delivery DOI: 10.1049/iet-nbt.2015.0021 -
Acetate zaupanje 1,0
“The third experiment, a new culture of the strain was prepared, and cm-1 peak with wavelength is 865.61 related to C-O.”
Shakeri 等 - 2022 - Biosynthesis of Selenium Nanoparticles and Evaluat DOI: 10.1155/2022/4118048 -
Silicon-oxygen (Si-O) zaupanje 1,0
“Additional cm-1 cm-1 of SiO4, symmetric stretching of ZnO4, asymmetric stretching of ZnO4, and Si-O bond vibration, IR spectra at 866 are attributed to symmetric stretching of SiO 4, and 900, 930 and 977 as”
Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System DOI: 10.3390/app10144940 -
Aromatic ring zaupanje 1,0
“benzene ring stretching vibration are 866 and 809 Combined with the analysis of the infrared spectrum of L-DMA in Figure 6, it can be inferred that the modification process of L-DMA on asphalt is mainly a physical modification process.”
Bionic Synthesis of Mussel-like Adhesive L-DMA and Its Effects on Asphalt Properties DOI: 10.3390/ma15155351 -
zaupanje 0,9
“Text: 'two symmetric stretching vibration peaks of the BO anion at 866 and 912cm-1'.”
Zhang 等 - 2008 - Infrared spectra and luminescence properties of (Y DOI: 10.1016/j.jallcom.2007.01.010
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