What absorbs at 1429 cm⁻¹ in an FTIR spectrum?
A band near 1429 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 1429 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 |
|---|---|---|---|
| Alkyl C-H | 9 | 9 | 1,0 |
| Hydroxyl (O-H) | 5 | 5 | 1,0 |
| Methacrylate | 5 | 5 | 1,0 |
| Acetate | 5 | 5 | 1,0 |
| Carboxyl (COOH) | 5 | 5 | 1,0 |
| Carbonyl (C=O) | 4 | 4 | 1,0 |
| Methoxy (OCH3) | 4 | 4 | 1,0 |
| C-O single bond | 4 | 4 | 1,0 |
| Aromatic ring | 3 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Carbonate | 2 | 2 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Carbohydrate | 2 | 2 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Silicate | 1 | 1 | 1,0 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Iespējamie materiāli
| Materiāls | Atbalstošie pīķi | Pārklājošās grupas | Citētie avoti |
|---|---|---|---|
| Chitosan | 1429, 1650, 1655 | Alkyl C-H, Acetate, Methacrylate | 1 |
| graphene oxide | 1429, 1150, 3400 | Hydroxyl (O-H), Methacrylate, Acetate | 1 |
| cellulose | 1429, 1735, 1650 | Alkyl C-H, Acetate, Methacrylate | 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 1429 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
-
Silicate pārliecība 1,0
“The sodium silicate μL and 100 DMSO per well was added to dissolve the shows the absorption bands around 1429, 970, 864 and cm-1”
Fabrication of Biogenic Silica Nanostructures from Sorghum bicolor Leaves for Food Industry Applications DOI: 10.1007/s12633-020-00379-4 -
Carboxyl (COOH) pārliecība 1,0
“Atomic Force Microscopy vibrations at 1429 and 1380 showed the surface roughness which up surged with an increase in the concentration of boric acid in”
Reticulated three-dimensional network ablative composites for heat shields in thermal protection systems DOI: 10.1039/c4ra05811a -
pārliecība 1,0
“ATR-FTIR spectra of different amino acid coKeywords: cm-1 functionalised FITC-GONP showed an increase in the FTIR band intensity at 1429 which was oxide nanoparticles Graphene significantly reduced due to electrostatic/pi-pi interactions of”
Fluorometric estimation of amino acids interaction with colloidal suspension of FITC functionalized graphene oxide nanoparticles DOI: 10.1016/j.apsusc.2016.11.070 -
Hydroxyl (O-H) pārliecība 1,0
“The peaks at 1429 and 1340 are related to the vibrations of cm-1 the -OH and -CH groups in the pyranose ring.”
Rupiasih 等 - 2018 - Study on Transport Properties of Chitosan Membrane DOI: 10.5614/j.math.fund.sci.2018.50.2.6 -
Alkyl C-H pārliecība 1,0
“The bands at 1429 1163 1032 and cm-1 β-linked 892 are attributed to C-H bending and C-O-C stretching of glucose subunits.”
Transformation of Oil Palm Waste-Derived Cellulose into Solid Polymer Electrolytes: Investigating the Crucial Role of Plasticizers DOI: 10.3390/polym13213685 -
Carbonyl (C=O) pārliecība 1,0
“Explicit assignment in text.”
Pyrolysis of Solid Waste for Bio-Oil and Char Production in Refugees’ Camp: A Case Study DOI: 10.3390/en14133861 -
Alkyl C-H pārliecība 1,0
“1467 (0.03) HC CC/CH asymmetric ring stretch 1429 1447 (0.20) 1433 1450 (0.14)”
Hydrogen Bonding in Human Manganese Superoxide Dismutase Containing 3-Fluorotyrosine DOI: 10.1529/biophysj.105.060616 -
pārliecība 1,0
“cm-1 The chelated structures are indicated by the bands at 3121 (P1, P2) and are 32cm-1 calcium carbonate, assigned to CaCO 3, and the vibrations specific to CO at 1429 cm-1 (P1) and 1438 (P2) [31] are also present in the FTIR spectra of th”
The Origin and Physico-Chemical Properties of Some Unusual Earth Rock Fragments DOI: 10.3390/app12030983
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