What absorbs at 709 cm⁻¹ in an FTIR spectrum?
A band near 709 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
Kiire vastus
A band near 709 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.
Võimalikud funktsionaalrühmade määramised
| Funktsionaalrühm | Toetavad faktid | Tsiteeritud allikad | Kõrgeim usaldusväärsus |
|---|---|---|---|
| Silicon nitrogen | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Adsorbed carbon monoxide | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 0,8 |
Reiting kajastab kogunenud kirjanduslikke tõendeid, mitte ühte autoriteetset reeglit. Kinnitage alati oma proovi kontekstis.
Spektri loogika
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 709 cm⁻¹ is usually not enough for material identification by itself.
Reaalse maailma kasutus
Seda tüüpi päring on tavaline polümeeri tuvastamisel, tundmatu plasti sõeluuringul, kvaliteedikontrolli probleemide lahendamisel, ringlussevõetud materjali kontrollimisel ja kirjandusel põhineval piirkinnituste ülevaatel.
Levinud vead
- Ühe isoleeritud riba käsitlemine materjali tõendina ilma vähemalt ühte või kahte toetavat piiki kontrollimata.
- Ülekattumise ignoreerimine: mitu funktsionaalrühma võivad anda panuse sama lainearvu lähedal.
- Valideerimise vahelejätmine, kui lisandid, segud, oksüdatsioon või saastumine võivad spektrit moonutada.
Kontrollimise nõuanne
Kui ebakindlus püsib, kinnitage hüpotees DSC, GC-MS või TGA abil, eriti segude, lagunenud proovide ja täidetud polümeeride puhul.
Nende määramiste taga olev kirjandus
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Metal oxygen usaldusväärsus 1,0
“The absorption bands in the 709(cid:2)100cm(cid:2)1 region were attributed to the envelope Ce(cid:2)O Y(cid:2)O of the phonon band of the metal oxide or 468cm(cid:2)1 vibrations.”
Jeyanthi 等 - 2013 - STRUCTURAL ANALYSIS OF THE COMBUSTION SYNTHESIZED DOI: 10.1142/S0218625X13500376 -
usaldusväärsus 1,0
“709 The presence of these bands indicated the existence of C-Cl stretching, which can be attributed to the presence of calcium chloride in the sealer material itself.”
Assiry 等 - 2023 - Microstructural and Elemental Characterization of DOI: 10.3390/app13074517 -
Water (H2O) usaldusväärsus 1,0
“cm-1 The absorption bands at 1639 enlightened the existence starch.2,19 C�C of stretching in alkali-isolated The peaks at cm-1 709 indicated low content of coordinated water molecules due to wagging (out-of-plane bending) vibrations”
Malik 等 - 2022 - Improvement in Digestion Resistibility of Mandua S DOI: 10.1021/acsomega.2c02327 -
Adsorbed carbon monoxide usaldusväärsus 1,0
“their carbon monoxide photolysis band at 709 A.”
Comparison of redox and ligand binding behaviour of yeast and bovine cytochrome c oxidases using FTIR spectroscopy DOI: 10.1016/j.bbabio.2018.05.018 -
Silicon (Si) usaldusväärsus 1,0
“The band at cm-1, higher energy, 709 is assigned to Si-N stretching vibration [18, 19].”
Structure and ionic conductivity of nitrated lithium disilicate (LiSiON) glasses DOI: 10.1016/j.matchemphys.2018.02.045 -
Carbonyl (C=O) usaldusväärsus 0,8
“Explicit assignment: '709cm-1 stretching is shown for crystalline PTX'”
Zhao 等 - 2015 - Preparation and Characterization of Paclitaxel Loa DOI: 10.1155/2015/913254
Kas teil on selle ribaga spekter?
Laadige üles oma FTIR spekter ja saage sekunditega täielik tõlgendusaruanne — piikide määramised kirjandusviidetega, raamatukogu vasted ja usaldusväärsusega hinnatud tõendite ahel.