What absorbs at 772 cm⁻¹ in an FTIR spectrum?
A band near 772 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
Kiire vastus
A band near 772 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 |
|---|---|---|---|
| Alkyl C-H | 2 | 2 | 1,0 |
| Borate | 2 | 2 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
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 772 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
-
usaldusväärsus 1,0
“In Fourier-transform infrared spectra, a Cr O peak newly cm¡1 Cr-O cm¡1 appeared at 897 after Cr(VI) removal, whereas a peak was detected at 772 due to the association of Cr(VI) ions with ion-exchange sites.”
Modacrylic anion-exchange fibers for Cr\(VI\) removal from chromium-plating rinse water in batch and flow-through column experiments DOI: 10.1080/10934529.2017.1356192 -
C-S single bond usaldusväärsus 1,0
“cm-1 cm-1, S-OH [15] and the C-S stretching peaks were obtained at 907 and 772 respecOH [15] and the C-S stretching peaks were obtained at 907 cm-1 and 772 cm-1, respectively cm-1 tively [16,17].”
Anis 等 - 2023 - Studies on Polybenzimidazole and Methanesulfonate DOI: 10.3390/polym15132821 -
Phosphate (PO4) usaldusväärsus 1,0
“The band around 772 cm-1 frequency of (PO and the harmonics of P=O bending vibrations [21,22].”
The Influence of CoO/P2O5 Substitutions on the Structural, Mechanical, and Radiation Shielding of Boro-Phosphate Glasses DOI: 10.3390/ma14216632 -
Acetate usaldusväärsus 1,0
“1,6-Bis[4-(naphthyliminomethylidene)-phenoxy]-hexane cm-1): ν, FTIR (KBr, 3047 (=C-H stretch of the aromatic rings), 2941-2856 (C-H stretch of aliphatic chains), 1618 (-N=CHstretch), 1605, 1565, 1513 (C-C ring stretch), 1246, 1H-NMR 1166 (C”
Mesomorphic Behavior of Symmetric Azomethine Dimers Containing Different Chromophore Groups DOI: 10.3390/molecules26082183 -
usaldusväärsus 1,0
“bands observed at 772 and 809 were assigned to the OCO Nucleophilicity is a measure of the molecule to contribute the electrons.”
Growth, spectral, optical, electrical and computational analysis of sodium oxalate single crystals DOI: 10.1016/j.heliyon.2021.e06527 -
Borate usaldusväärsus 1,0
“For the C-PVA/PAN composite fiber, new absorption peaks located at cm-1 cm-1 772 and 653 were assigned to the stretching vibration of B-O-C and O-B-O [17,18].”
Ren 等 - 2018 - Polyvinyl Alcohol Reinforced Flame-Retardant Polya DOI: 10.3390/ma11122391 -
Alkyl C-H usaldusväärsus 1,0
“The cm-1 (peak 12) is assigned to methylene absorption at 772”
The Synthesis and Characterization of Novel Bis-cationic Asphalt Emulsifier DOI: 10.1051/matecconf/201713004004 -
Alkyl C-H usaldusväärsus 1,0
“The GNPs with good biocompatibility could bring modes of in-plane C-C stretching vibrations of The cm-1 new opportunities for ultrasensitive detection, molecular Raman band at 772 was assigned to the C-H out-of-”
IJN-24785-one-pot-green-synthesis-of-gold-nanoparticles-using-plant-ch DOI: 10.2147/IJN.S24785
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.