Hvad absorberer ved 670 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 670 cm⁻¹ kan pege på flere funktionelle grupper. Nedenfor er de mest sandsynlige tildelinger, rangeret efter hvor meget publiceret bevis der understøtter hver — hver enkelt spores til litteratur (DOI) og krydsvalideres mod vores 130.000+ referencespektre og vidensgraf.
Backed by 8 cited sources
Hurtigt svar
Et bånd nær 670 cm⁻¹ fortolkes normalt ved at kontrollere, hvilke funktionelle grupper der gentagne gange forekommer der i litteraturen, og derefter bekræfte mindst en eller to yderligere peaks i den samme prøve. Denne side rangerer disse tildelinger efter akkumuleret evidens snarere end efter en enkelt fast lærebogsregel.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Alkyl C-H | 9 | 9 | 1,0 |
| Metal oxygen | 9 | 6 | 1,0 |
| Aromatic ring | 4 | 4 | 1,0 |
| Hydroxyl (O-H) | 4 | 3 | 1,0 |
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| Sulfate (SO4) | 3 | 3 | 1,0 |
| Alkene (C=C) | 2 | 2 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Metal sulfur | 2 | 2 | 1,0 |
| Thiol | 2 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 1 | 1,0 |
| Silicon hydride | 2 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Silicon carbon | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| C-S single bond | 1 | 0 | 1,0 |
| Water (H2O) | 1 | 0 | 1,0 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| ZnO | 670, 1400, 3430 | Metal oxygen, Hydroxyl (O-H), Alkyl C-H | 1 |
| TiO2 | 670, 1700, 1093 | Metal oxygen, Hydroxyl (O-H), Alkyl C-H | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
Dette bånd bliver meningsfuldt kun, når det læses sammen med sine nabotoppe. I praksis ser analytikere først på tildelingerne ovenfor, og kontrollerer derefter, om den samme prøve også viser andre toppe, der forventes for det samme strukturelle motiv. Et enkelt bånd nær 670 cm⁻¹ er normalt ikke nok til materialeidentifikation alene.
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
“cm21, Waser,8 which may corresample the peaks at 670 and 725 an earlier report by in which no solubility was found spond to the Nb-O stretching modes, disappeared or signifiin donor-doped SrTiO by the hot water vapor method, as 3 decreased.”
Dai 等 - 2003 - Ambient-temperature incorporated hydrogen in Nb S DOI: 10.1063/1.1574842 -
C c single bond tillid 1,0
“was found that the pure and manganese-doped ZnO present (cid:19) (cid:18)c -c film bulk σ = -233×109 Pa, (4) characteristic bulk vibration modes of ZnO, which are located c 670cm-1, bulk at about 332, 410, 437, 581 and as indicated E”
Kharroubi 等 - 2012 - Mn doping effect on the structural properties of Z DOI: 10.1088/0031-8949/86/01/015805 -
Aromatic ring tillid 1,0
“The absorption peaks including aromatic C-H deformation at 670 cm-1, C-O stretching at 1052 cm-1, phenolic C-OH stretching at 1200 cm-1, C-OH at 1361 cm-1, hydroxyl groups of molecular water and C=C at 1625 cm-1,”
Influence of Sputtering Temperature of TiO2 Deposited onto Reduced Graphene Oxide Nanosheet as Efficient Photoanodes in Dye-Sensitized Solar Cells DOI: 10.3390/molecules25204852 -
Alkyl C-H tillid 1,0
“to a peak displacement at 3041 However, in the reaction with formic acid, the cm-1 absorption peak at 3009 of the C=C bond is verified, indicating that the difference in events is related to the unsaturation conversion into an oxirane ring,”
Montenegro 等 - 2023 - Enzymatic and Synthetic Routes of Castor Oil Epoxi DOI: 10.3390/polym15112477 -
Thiol tillid 1,0
“In FT-IR experiments, a prominent peak at 670 corresponding to for -SH Cd2+ stretching vibrations, indicates strong ground-state interactions between the of GSH and ions.”
Probing How Various Metal Ions Interact with the Surface of QDs: Implication of the Interaction Event on the Photophysics of QDs DOI: 10.1021/acs.langmuir.1c00548 -
Metal sulfur tillid 1,0
“of CdS thin films prepared by spin coating technique cm-1 Another peak detected around 670 is due to the Cd-S at 2000 rpm and annealed at 300 °C for 5 min from CdS vibrational mode which agrees well with reported value solution with and wit”
Effect of Triton X-100 surfactant on thiol-amine cosolvents assisted facile synthesized CdS thin films on glass substrate by spin coating method DOI: 10.1007/s42452-020-2423-y -
Hydroxyl (O-H) tillid 1,0
“1378.13 1384.4 1384.47 1385 O-H asymmetric stretching 670.00 664.89 662.89 660”
Investigation on structural, optical and electrical nature of pure and Cr-incorporated cobalt oxide nanoparticles prepared via co-precipitation method for photocatalytic activity of methylene blue dye DOI: 10.1007/s10854-020-04708-6 -
Acetate tillid 1,0
“C-O dio etera koji je supstituiran benzilom cm-1gives weight loss curve can be used to tell the point at which The peak at 670 information on C-OH weight loss is most apparent (Figure 8).”
Uner 等 - 2016 - Wood Waste Turned Into Value Added Products Therm DOI: 10.5552/drind.2016.1534
Har du et spektrum med dette bånd?
Upload dit FTIR-spektrum og få en fuld fortolkningsrapport — peak-tildelinger med litteraturhenvisninger, biblioteksmatch og en litteraturunderstøttet analyse — på få sekunder.