What absorbs at 1285 cm⁻¹ in an FTIR spectrum?
A band near 1285 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
Ateb cyflym
A band near 1285 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 |
|---|---|---|---|
| Methacrylate | 6 | 5 | 1.0 |
| C-O single bond | 6 | 5 | 1.0 |
| Acetate | 6 | 5 | 1.0 |
| Methoxy (OCH3) | 5 | 4 | 1.0 |
| Amide | 4 | 4 | 1.0 |
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Silanol (Si-OH) | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| N c o | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 0.7 |
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 |
|---|---|---|---|
| polypyrrole | 1285, 1700, 400 | Methacrylate, Acetate | 1 |
| PPy | 1285, 1043, 910 | Methoxy (OCH3), Methacrylate, C-O single bond | 1 |
| montmorillonite | 1285, 1637, 523 | Methacrylate, Acetate | 1 |
| nanocomposite | 1285, 2921, 3300 | Methacrylate, Acetate, C-O single bond | 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 1285 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
-
N c o hyder 1.0
“The peaks at 1285 and 1078 are due to Ar-O = prepared with NCO/OH 2 are shown in Figure 3A and B, and R-O stretching, respectively, showing the presence of 1700 1720”
Shoaib 和 Bahadur - 2016 - Synthesis of thermally and mechanically improved p DOI: 10.1515/epoly-2016-0134 -
Acetate hyder 1.0
“An intense peak at 2 cm-1 C=O 1710 is due to the stretching vibration and the cm-1 C-O signal at 1285 is attributable to the stretch.”
β-cyclodextrin coating: improving biocompatibility of magnetic nanocomposites for biomedical applications DOI: 10.1007/s10856-020-6361-4 -
Silicon (Si) hyder 1.0
“3379cm-1 3381cm-1 mightbeduetoCa-Ostretchingvibrations,whiletheintense and are ascribed to Al-OH and AlSi1123cm-1 bands at 953 and OH/Li-vibrations, respectively [36], since Al3+ and Fe3+ attributed to Si-O strong 1389cm-1 replace the Si4+”
Ahmad 等 - 2021 - Spectroscopic Analysis for Harnessing the Quality DOI: 10.1155/2021/6629640 -
Amide hyder 1.0
“PVP displayed a carbonyl stretching band at 1655 a band at 1655 cm-1, a group of C-H deformation-related bands around 1450 cm-1, CH2 cm-1, group of C-H deformation-related bands around 1450 CH wagging coupled with C2 wagging coupled with C-”
Polypyrrole Aerogels: Efficient Adsorbents of Cr(VI) Ions from Aqueous Solutions DOI: 10.3390/gels9070582 -
Acetate hyder 1.0
“correspond to the C-C bond are centered at 1350 and 1325 cm-1 for the gauche and trans conformation, cm-1 gauche trans the C-C bond are centered at 1350 and 1325 for the and conformation, while the while the absorption bands that correspond”
Bollas 等 - 2017 - Polymer Conformation under Confinement DOI: 10.3390/polym9020073 -
Amide hyder 1.0
“peaks at 1285 1207 1115 and cm-1 1075 were attributed to C-N and C-O-C stretching vibrations, C-O stretching vibration cm-1”
In Vitro Interaction of Doxorubicin-Loaded Silk Sericin Nanocarriers with MCF-7 Breast Cancer Cells Leads to DNA Damage DOI: 10.3390/polym13132047 -
Alkyl C-H hyder 1.0
“The oleic acid showed principal peaks at 2922 cm-1, 2853 1708 1412 1285 and 935 that indicated asymmetric CH stretching, 2 cm-1, 1708 cm-1, 1412 cm-1, 1285 cm-1 and 935 cm-1 that indicated asymmetric CH2 stretchsymmetric CH stretching, C=O”
In Vitro and Ex Vivo Evaluation of Fluocinolone Acetonide–Acitretin-Coloaded Nanostructured Lipid Carriers for Topical Treatment of Psoriasis DOI: 10.3390/gels8110746 -
Hydroxyl (O-H) hyder 1.0
“The spectra of catechin displayed cm-1 cm-1, cm-1, peaks at 3482 representing O-H stretching regions, and 1656 1285 cm-1 cm-1 1150 and 1071 representing the existence of aromatic rings [25].”
Shah 等 - 2022 - Encapsulation of Catechin into beta-Glucan Matrix DOI: 10.3390/foods11101493
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.