What absorbs at 3236 cm⁻¹ in an FTIR spectrum?
A band near 3236 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 6 cited sources
Ateb cyflym
A band near 3236 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.
Aseiniadau grŵp swyddogaethol posibl
| Grŵp swyddogaethol | Ffeithiau ategol | Ffynonellau a ddyfynnwyd | Hyder uchaf |
|---|---|---|---|
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| N h | 3 | 3 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
Mae＇r safle＇n adlewyrchu tystiolaeth llenyddiaeth gronnwyd, nid rheol awdurdodol sengl. Cadarnhewch bob amser yn erbyn eich cyd-destun sampl.
Deunyddiau posibl
| Deunydd | Copaon ategol | Grwpiau sy＇n gorgyffwrdd | Ffynonellau a ddyfynnwyd |
|---|---|---|---|
| Epoxy | 3236, 1660, 1735 | Alkyl C-H | 1 |
| polyurethane | 3236, 2270, 1700 | Alkyl C-H, N h | 1 |
| epoxy resin | 3236, 905, 1100 | Alkyl C-H | 1 |
| alginate | 3236, 1100, 1715 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| activated carbon | 3236, 1575, 1210 | Hydroxyl (O-H), Alkyl C-H | 1 |
Mae deunyddiau＇n cael eu dangos dim ond pan fydd yr un gronfa lenyddiaeth yn cefnogi＇r band hwn ac o leiaf un brig nodweddiadol ychwanegol.
Rhesymeg sbectrwm
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 3236 cm⁻¹ is usually not enough for material identification by itself.
Defnydd yn y byd go iawn
Mae＇r math hwn o ymholiad yn gyffredin mewn adnabod polymer, sgrinio plastig anhysbys, datrys problemau QC, dilysu deunydd wedi＇i ailgylchu, ac adolygiad o aseiniad copa wedi＇i gefnogi gan lenyddiaeth.
Camgymeriadau cyffredin
- Trin un band ynysig fel prawf o ddeunydd heb wirio o leiaf un neu ddau gopa cefnogol.
- Anwybyddu gorgyffwrdd: gall grwpiau swyddogaethol lluosog gyfrannu ger yr un rhif ton.
- Hepgor dilysu pan fo ychwanegion, cymysgeddau, ocsideiddio, neu halogiad yn gallu ystumio＇r sbectrwm.
Cyngor dilysu
Pan fo amwysedd yn parhau, dilyswch y rhagdybiaeth gyda DSC, GC-MS, neu TGA, yn enwedig ar gyfer cymysgeddau, samplau dirywiedig, a pholymerau llawn.
Llenyddiaeth y tu ôl i＇r aseiniadau hyn
-
Aromatic ring hyder 1.0
“The bands at 3236, 1637, 1569, 1444, is observed for the quinonoid ring-stretching vibrations”
Blaha 等 - 2019 - Role of p-Benzoquinone in the Synthesis of a Condu DOI: 10.1021/acsomega.9b00542 -
Hydroxyl (O-H) hyder 1.0
“LLM confirmed rule peak-group candidate”
Optimization of Cr (VI) removal from aqueous solution with activated carbon derived from Eichhornia crassipes under response surface methodology DOI: 10.1186/s13065-023-00913-6 -
N h hyder 1.0
“Assigned to N-H stretching vibration.”
The Influence of Initiator Concentration on Selected Properties of Thermosensitive Poly(Acrylamide-co-2-Acrylamido-2- Methyl-1-Propanesulfonic Acid) Microparticles DOI: 10.3390/polym -
hyder 1.0
“12 (Figure 5) the first changes appear in all samples in the range of wave numbers amounting to approximately 3236 cm-1, and this is the occurrence of stretching vibrations of the amino group N-H.”
Markowicz 和 Szymanska-Pulikowska - 2021 - Assessment of the Decomposition of Oxoand Biodeg DOI: 10.3390/ma14216449 -
Hydroxyl (O-H) hyder 1.0
“Meanwhile, salicylic acid exhibited distinctive peaks at 3236 and around 3008-2858 C=O which indicate O-H and C-H stretch, respectively.”
Nugrahani 等 - 2020 - A Comprehensive Study of a New 1.75 Hydrate of Cip DOI: 10.3390/cryst10050349 -
Hydroxyl (O-H) hyder 1.0
“7 the FTIR absorption between 3236 and 3250 is due to hydroxyl ions of the clay minerals, cm-1 and the peak at 3140 can be attributed to hydrated ferric oxide.”
Sanchez-Polo 等 - 2019 - An Archaeometric Characterization of Ecuadorian Po DOI: 10.1038/s41598-018-38293-w
Oes gennych sbectrwm gyda＇r band hwn?
Llwythwch eich sbectrwm FTIR i fyny a chael adroddiad dehongli llawn — aseiniadau brig gyda chyfeiriadau llenyddiaeth, cyfateb llyfrgell, a chadwyn dystiolaeth â gradd hyder — mewn eiliadau.