What absorbs at 1332 cm⁻¹ in an FTIR spectrum?
A band near 1332 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
Ātra atbilde
A band near 1332 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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Boron nitrogen | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| S eq o | 1 | 1 | 0,9 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Iespējamie materiāli
| Materiāls | Atbalstošie pīķi | Pārklājošās grupas | Citētie avoti |
|---|---|---|---|
| diamond | 1332, 1378, 1545 | Methoxy (OCH3) | 2 |
| PVA | 1332, 1660, 2930 | Acetate, Methacrylate, C-O single bond | 1 |
| ZnO | 1332, 1400, 3430 | Acetate, Methacrylate, C-O single bond | 1 |
| PVC | 1332, 834, 1195 | Methoxy (OCH3), Methacrylate, Acetate | 1 |
| ZnO nanoparticles | 1332, 1219, 1726 | Methacrylate, Acetate, C-O single bond | 1 |
| graphite | 1332, 1640, 1326 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
Materiāli tiek parādīti tikai tad, ja šo joslu un vismaz vienu papildu raksturīgo pīķi atbalsta tā pati literatūras kopa.
Spektra loģika
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 1332 cm⁻¹ is usually not enough for material identification by itself.
Reālās pasaules izmantošana
Šāda veida vaicājums ir izplatīts polimēru identificēšanā, nezināmas plastmasas skrīningā, kvalitātes kontroles problēmu risināšanā, pārstrādāto materiālu pārbaudē un ar literatūru pamatotā pīķu piešķīruma pārskatā.
Biežākās kļūdas
- Vienas izolētas joslas uzskatīšana par materiāla pierādījumu, nepārbaudot vismaz vienu vai divus atbalsta pīķus.
- Ignorējot pārklāšanos: vairākas funkcionālās grupas var dot ieguldījumu tuvu tam pašam viļņa skaitlim.
- Izlaist validāciju, ja piedevas, maisījumi, oksidācija vai piesārņojums var izkropļot spektru.
Verifikācijas padoms
Ja joprojām pastāv neskaidrība, apstipriniet hipotēzi ar DSC, GC-MS vai TGA, īpaši maisījumiem, noārdītiem paraugiem un pildītiem polimēriem.
Literatūra aiz šiem piešķīrumiem
-
C c single bond pārliecība 1,0
“Isoindole stretching 1372 Isoindole stretching C-C 1332 Pyrrole stretching coupled with aza rocking C-H 1256 deformation C-H 1164 deformation”
Gharagozlou 和 Naghibi - 2018 - Sensitization of ZnO nanoparticles by metal-free p DOI: 10.1016/j.jlumin.2017.12.020 -
Acetate pārliecība 1,0
“There is no sharp cm-1 (structural OH and adsorbed water), a small peak at 1100 (sp 3and isolated characteristic Raman peak at 1332 cm-1 cm-1 due to C-O, and a large peak at around 815 bonded carbon) which is related to a nanodiamond phase”
Ito 等 - 2021 - Assessing the debris generated by the small carry- DOI: 10.2343/geochemj.2.0632 -
pārliecība 1,0
“cm-1 100 h 5 the Raman peak at 1332 associated with Fano interference 200 h 6.5 [27-29] in the boron doped diamond films was observed only in 400 h”
Jagannadham 等 - 2007 - Neutron transmutation of B-10 doped diamond DOI: 10.1016/j.diamond.2006.03.019 -
Boron nitrogen pārliecība 1,0
“of 745 and when the h-BN addition h-BN additive located at Furthercontent reaches 0.8wt% is interesting, which results more, the Raman peaks shift down to 1331.74 and”
B–C Bond in Diamond Single Crystal Synthesized with h-BN Additive at High Pressure and High Temperature DOI: 10.1088/0256-307X/33/2/028101 -
Alkyl C-H pārliecība 1,0
“The C-H stretching band on neighboring CHCl groups at and 1332 cm-1 were ascribed to hydrothermal process [27].”
Understanding Hydrothermal Dechlorination of PVC by Focusing on the Operating Conditions and Hydrochar Characteristics DOI: 10.3390/app7030256 -
Amide pārliecība 1,0
“cm-1 peak increases obviously after HPHT and the 1282 cm-1 peak,23 and the results are absorption coefficient of 1332 treatment, these two peaks are respectively attributed to C N+ listed in Table.”
Miao 等 - 2019 - High-pressure and high-temperature treatment of N- DOI: 10.1039/C9CE00472F. -
Amide pārliecība 1,0
“In order to check if the frequency of Characteristic vibration frequencies observed in our films cm(cid:2)1 and reduces due C-N stretching mode lies around 1332”
Titus 等 - 2006 - Nitrogen and hydrogen related infrared absorption DOI: 10.1016/j.tsf.2005.12.062 -
Alkyl C-H pārliecība 1,0
“The effect apportioned between cm-1 cm-1 at of 921 assigned to CH2 rocking and the peak at 1332 MWCNTs on some characterizing IR bands can be taken correspond to (CH+OH) bending [13].”
Characterization and some physical studies of PVA/PVP filled with MWCNTs DOI: 10.1016/j.jmrt.2018.04.023
Vai jums ir spektrs ar šo joslu?
Augšupielādējiet savu FTIR spektru un dažu sekunžu laikā iegūstiet pilnu interpretācijas ziņojumu — maksimumu piešķīrumus ar literatūras atsaucēm, bibliotēku saskaņošanu un pārliecības līmeņa pierādījumu ķēdi.