What absorbs at 717 cm⁻¹ in an FTIR spectrum?
A band near 717 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
Hurtigt svar
A band near 717 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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Alkyl C-H | 5 | 5 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| N h | 1 | 0 | 1,0 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| CNTs | 717, 3465, 2941 | Alkyl C-H, Aromatic ring | 1 |
| HDPE | 717, 1369, 1216 | Alkyl C-H, Aromatic ring | 1 |
| LDPE | 717, 1720, 1737 | Alkyl C-H, Aromatic ring | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
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 717 cm⁻¹ is usually not enough for material identification by itself.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
Metal oxygen tillid 1,0
“USC cm-1 The characteristic sharp bands for Fe-O stretching were found at 717, 623,557 and 443 which confirmed the formation of magnetite nanoparticles.”
Mesoporous magnetite nanoparticles synthesis using the Peltophorum pterocarpum pod extract, their antibacterial efficacy against pathogens and ability to remove a pollutant dye DOI: 10.1016/j.molstruc.2018.10.042 -
Hydroxyl (O-H) tillid 1,0
“Description (cm-1) 717 As-OH vibration Symmetry stretch of As-OH As(III) As(OH) 3 2)- 721 As-O vibration Symmetry stretch of As-O AsO(OH”
The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic DOI: 10.1007/s13201-022-01660-0 -
Hydroxyl (O-H) tillid 1,0
“Polarized FTIR spectra of cm-1 films axially stretched CC PPO/carvacrol show that the guest peak at 717 is not dichroic, while the guest peak at cm-1 cm-1 confirms O-H 698 is markedly dichroic.”
Golla 等 - 2021 - Isolated and aggregated carvacrol guest molecules DOI: 10.1038/s41428-021-00511-0 -
Aromatic ring tillid 1,0
“The corresponding aromatic stretching 717 and 1614cm(cid:5)1”
A study on the characteristics of Algerian Hassi-Messaoud asphaltenes: solubility and precipitation DOI: 10.1080/10916466.2021.2017457 -
Alkyl C-H tillid 1,0
“The 717 absorption band is designated to the C-H stretching vibration of the CH 3/CH groups.”
Almousa 等 - 2021 - Paraffin Wax [As a Phase Changing Material (PCM)] DOI: 10.3390/cryst11080951 -
Metal oxygen tillid 1,0
“One visible shoulder peak at ~717 emerged, which is the absorption band of the Fe-O in the FH [26], at the expense of the shoulder peak located at”
Effects of Potassium Loading over Iron–Silica Interaction, Phase Evolution and Catalytic Behavior of Precipitated Iron-Based Catalysts for Fischer-Tropsch Synthesis DOI: 10.3390/catal12080916 -
Chlorine tillid 1,0
“Explicit assignment in text”
Fabrication of Chitosan Nanofibers Containing Some Steroidal Compounds as a Drug Delivery System DOI: 10.3390/polym14102094 -
Alkyl C-H tillid 1,0
“The production and packaging of LDPE, the peak wavelength at represents the CH bend, 3 730cm-1, 719cm-1 717cm-1”
Hossain 等 - 2023 - First evidence of microplastics and their characte DOI: 10.3389/fenvs.2023.1232931
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