What absorbs at 3389 cm⁻¹ in an FTIR spectrum?
A band near 3389 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 3389 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 |
|---|---|---|---|
| N h | 5 | 4 | 1.0 |
| Hydroxyl (O-H) | 4 | 3 | 1.0 |
| Hydrogen bond | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 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 |
|---|---|---|---|
| chitosan | 3389, 1650, 1655 | Hydroxyl (O-H), N h | 1 |
| cellulose acetate | 3389, 1650, 1741 | Hydroxyl (O-H) | 1 |
| polyurethane | 3389, 2270, 1700 | N 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 3389 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 h hyder 1.0
“The origin cm-1 of the vibration bands is as follows: at 3389 due to the NH stretching vibrations, cm-1 cm-1 at 2936 due to a CH-stretching vibrations, at 620 due to CH out-of-plane bending vibration.”
Synthesis and characterization thin films of conductive polymer (PANI) for optoelectronic device application DOI: 10.1063/1.4948838 -
Amide hyder 1.0
“Moderate exposure of the cm(cid:0) 1), O-H BRG peaks, displaying stretching (band A, 3389 amide I hydrophobic protein groups promoted the protein-oil interaction, cm(cid:0) 1), C¼O N-H (band B, stretching, 1648 amide II (band C, bending, co”
Effect of different carbohydrates on the functional properties of black rice glutelin (BRG) modified by the maillard reaction DOI: 10.1016/j.jcs.2020.102979 -
Hydroxyl (O-H) hyder 1.0
“derived from castor oil, showed the -OH group bending band at 3389 The bands cm-1 at 2926, 2855, and 1739 were designated to asymmetric stretching and symmetric stretching of the CH group and C=O group, respectively.”
Impact of Diisocyanates on Morphological and In Vitro Biological Efficacy of Eco-Friendly Castor-Oil-Based Water-Borne Polyurethane Dispersions DOI: 10.3390/polym14173701 -
Hydrogen bond hyder 1.0
“11.3 stretching (5) Si-O asymmetric 1154 1144 1130 1167 stretching (6) N-H(cid:5)(cid:5)(cid:5)N stretching 3341 3345 3351 3358 that there are no N-N and H-H bonds present in the (7) N-H stretching 3389 3396 3399 3403”
Ay 和 Aydinli - 2004 - Comparative investigation of hydrogen bonding in s DOI: 10.1016/j.optmat.2003.12.004 -
hyder 1.0
“cm-1, XN-NIC XN-GA was also distinguished in and with a new band at 3352 and 3389 cm-1 respectively, and upshift of band at ca.”
Budziak 等 - 2019 - Formation of Prenylated Chalcone Xanthohumol Cocry DOI: 10.3390/molecules24234245 -
Hydroxyl (O-H) hyder 1.0
“LLM confirmed rule peak-group candidate”
Helen 等 - 2023 - Amelioration of ionic conductivity (303 K) with th DOI: 10.21203/rs.3.rs-1557220/v1 -
N h hyder 1.0
“Conversely to the PURs the PUR-M revealed the well-shaped NH band was observed as well, but its intensity relating to the "free" NH (3389 cm-1) in the PUR-M stretching band related to the moderate and strong hydrogen bonds present in the HS”
The Influence of Calcium Glycerophosphate (GPCa) Modifier on Physicochemical, Mechanical, and Biological Performance of Polyurethanes Applicable as Biomaterials for Bone Tissue Scaffolds Fabrication DOI: 10.3390/polym9080329 -
Carbonyl (C=O) hyder 1.0
“The key feature absorption bands appeared at (1741-1748 which were cm-1 assigned to carbonyl (C=O) as well as a diminishing in the strength of the band at 3388.93 which was attribcm-1) uted to OH vibration, and the peak at (1365-1372 was at”
Ferric perchlorate hydrate as a new catalyst for highly efficient esterification of cellulose at room temperature DOI: 10.1038/s41598-022-09669-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.