What absorbs at 2005 cm⁻¹ in an FTIR spectrum?
A band near 2005 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 2005 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 3 | 1.0 |
| Methacrylate | 4 | 3 | 1.0 |
| Acetate | 4 | 3 | 1.0 |
| Amide | 3 | 3 | 1.0 |
| Carbonyl (C=O) | 3 | 3 | 1.0 |
| Methoxy (OCH3) | 3 | 2 | 1.0 |
| C-O single bond | 3 | 2 | 1.0 |
| Ketone | 2 | 2 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Silicon hydride | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| N h | 1 | 0 | 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 |
|---|---|---|---|
| PEG | 2005, 1650, 1342 | Alkyl C-H, Methacrylate, Acetate | 1 |
| cellulose | 2005, 1735, 1650 | Alkyl C-H, Acetate, Methacrylate | 1 |
| lignin | 2005, 1035, 1510 | Alkyl C-H, Methacrylate, Acetate | 1 |
| hydrogel | 2005, 1632, 1062 | Amide, Methacrylate, Acetate | 1 |
| honey | 2005, 1199, 1345 | Methacrylate, Acetate, Alkyl C-H | 1 |
| gold nanoparticles | 2005, 1638, 3252 | Amide, Alkyl C-H, Methacrylate | 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 2005 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
-
Alkyl C-H hyder 1.0
“Thus the concentration of TPC in carbohydrate structure and characteristic of C H or C O honey is variable and depends on the geographical and stretching vibration (Tewari and Irudayaraj 2005).”
Physicochemical, antioxidant and FTIR-ATR spectroscopy evaluation of Kashmiri honeys as food quality traceability and Himalayan brand DOI: 10.1007/s13197-020-04878-5 -
Acetate hyder 1.0
“Further, a slight red-shift in the C=O stretching cm-1 Alexandridis 2005;”
Behera 和 Ram - 2013 - Synthesis and characterization of core-shell gold DOI: 10.1007/s13204-012-0076-x -
Carbonyl (C=O) hyder 1.0
“G-type lignin (Faix, 1991) Lignin 1269 Guaiacyl ring breathing with carbonyl stretching (Kubo and Kadla, 2005) Lignin 1030”
Dinant 等 - 2019 - Synchrotron FTIR and Raman spectroscopy provide un DOI: 10.1093/jxb/ery396 -
Hydroxyl (O-H) hyder 1.0
“to C=O stretching, C-N stretching, O-H bending and C-H evaluated by X-ray diffractometer, PANAlytical Model PW stretching vibrations, respectively (Can 2005;”
Mahmud 等 - 2018 - Influence of Poly (Ethylene Glycol) on the Charact DOI: 10.17576/jsm-2018-4706-14 -
Hydroxyl (O-H) hyder 1.0
“AppliedClayScience228(2022)106648 Si-O to the apical vibrations of apical bonds, in-plane Si-O-Si stretching vibrations, Si-O-Al vibrations, inner surface hydroxyl groups Al-O-H O-H vibrations in Al-O-H, respectively (Hoch vibrations and in”
Potential reactivity assessment of mechanically activated kaolin as alternative cement precursor DOI: 10.1016/j.clay.2022.106648 -
C-O single bond hyder 1.0
“et al., 1964) 2015) C-C (Labb´e p Pectin 1018 (Wilson et al., and C-O, 1504 et al., 2000) OCH vibration 2005) 1018 (McCann et al., 1500 (Sills and”
Unveiling the compositional remodelling of Arbutus unedo L. fruits during ripening DOI: 10.1016/j.scienta.2022.111248 -
Methoxy (OCH3) hyder 1.0
“2005) and methoxyl vibration (Moran et al.”
Chemical functional groups of extractives, cellulose and lignin extracted from native Leucaena leucocephala bark DOI: 10.1007/s00226-020-01258-2 -
Acetate hyder 1.0
“cm-1 1600 cm-1 was associated with the C=O stretching of proteins (Jabs 2005) or residual aceWhile the band at 1600 was associated with the C=O stretching of proteins (Jabs cm-1 tate, the low-intensity peak at 3000 cm-1 was associated with”
Minhas 等 - 2023 - Green Synthesis of Zinc Oxide Nanoparticles Using DOI: 10.3390/catal13030549
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.