What absorbs at 683 cm⁻¹ in an FTIR spectrum?
A band near 683 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 683 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 |
|---|---|---|---|
| Ring structure | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Phosphate (PO4) | 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.
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 683 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
-
Phosphate (PO4) hyder 1.0
“The third intense band at 683 is assigned to the symmetric stretching of P-O-P Q2 Q1 cm-1 linkages in and structural unit [50].”
El-Hezzat 等 - 2021 - Structure - Properties study of Na2O-CaO-PbO-P2O5 DOI: 10.1016/j.solidstatesciences.2021.106666 -
hyder 1.0
“The highest-frequency A1g mode at 683 cm-1 is assigned to the symmetric stretching vibrations of the oxygen atoms with respect to the metal ion Coatings2023,13,1250 8of15 in the tetrahedral sites, a mode that can be also described as tetrah”
Synthesis of CoFe2O4 through Wet Ferritization Method Using an Aqueous Extract of Eucalyptus Leaves DOI: 10.3390/coatings13071250 -
Metal oxygen hyder 1.0
“cm-1 at ~615 shows the single degenerate symmetric vibrations of O-Cu-O linkages along with vibrations units.(73,76) in TeO After the annealing treatment, the 4 cm-1 sharp peak at 683 which corresponds to TeO 4”
Kaur 等 - 2020 - Structure of copper tellurite and borotellurite gl DOI: 10.13036/17533562.61.1.007 -
Carbonate hyder 1.0
“tion band at 683 was associated with carbonate”
Identification of pigments used in a Qajar manuscript from Iran by using atomic and molecular spectroscopy and technical photography methods DOI: 10.1186/s40494-022-00665-x -
C c single bond hyder 1.0
“The band appearing at 683 ± 2 1612 ± 1 cm-1 was assigned the C-C macrocycle ring deformation.”
Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives DOI: 10.3390/ma7096585 -
hyder 0.9
“Explicit assignment: 'two bonds representing the α-phase of PA12 were observed at wavenumber of 576 and 683'”
Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments DOI: 10.1002/ppap.201800032
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.