Hvad absorberer ved 1399 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1399 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 1399 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 |
|---|---|---|---|
| Methacrylate | 4 | 3 | 1,0 |
| Acetate | 4 | 3 | 1,0 |
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Methoxy (OCH3) | 3 | 2 | 1,0 |
| C-O single bond | 3 | 2 | 1,0 |
| Carbonate | 2 | 2 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Nitrile | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 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 | 1399, 1400, 3430 | Alkyl C-H, Acetate, Methacrylate | 1 |
| graphene | 1399, 1720, 2097 | Methacrylate, Acetate, Carboxyl (COOH) | 1 |
| zinc oxide nanoparticles | 1399, 1744, 1627 | Acetate, Alkyl C-H, Methacrylate | 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 1399 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
-
Carbonate tillid 1,0
“Several peaks with values at 1457 cm-1, 1399 cm-1, or 1340 cm-1 can also be seen, associated with the presence of CO3.”
Remineralization Potential of Three Restorative Glass Ionomer Cements: An In Vitro Study DOI: 10.3390/jcm12062434 -
Carboxyl (COOH) tillid 1,0
“The strong characteristic absorption peak at 1550 was attributed to to the vibration of COOgroup of the galacturonic acid and those at 1399 cm-1 could correspond to COOcm-1 the vibration of group of the galacturonic acid and those at 1399 c”
Lukova 等 - 2020 - Prebiotic Activity of Polyand Oligosaccharides O DOI: 10.3390/app10082648 -
tillid 1,0
“ligands, these bands were shifted to 1512 and 1398 cm-1 for Zn[(acac)(LPhe)H2O] (Figure These phenomena caused a change in electron distribution, which resulted in a chemical 5a) and to 1518 and 1399 cm-1 for Zn[(acac)(LTrp)H2O] (Figure 5b)”
Synthesis of the Bacteriostatic Poly(l-Lactide) by Using Zinc (II)[(acac)(L)H2O] (L = Aminoacid-Based Chelate Ligands) as an Effective ROP Initiator DOI: 10.3390/ijms22136950 -
C-O single bond tillid 1,0
“The GO spectrum presents a broad band at 3192 cm-1, corresponding to the O-H stretching vibration, and peaks associated to the C = O (1734 cm-1), C-OH (1399 cm-1), C-O-C (1207 cm-1) and C-O (977 cm-1) vibrations.”
Joining Caffeic Acid and Hydrothermal Treatment to Produce Environmentally Benign Highly Reduced Graphene Oxide DOI: 10.3390/nano11030732 -
Acetate tillid 1,0
“The peaks at 1399 were attributed to the stretching vibrations of few C-O bond (v C-O) and cm(cid:16)1 C-C bond (v C-C).”
Dong 等 - 2012 - Preparation and properties of Nd,YbGGG polycrysta DOI: 10.1007/s40145-012-0030-0 -
Nitrile tillid 1,0
“The colored solution which could be due to the nitrile triple bond 1633.21cm-1 (DM) has been precisely prepared by mixing the three dyes C≡N, a band at which originates from the 1398.56cm-1 with same proportion in ultrapure water.”
Fegousse 等 - 2019 - Pineapple Bark Performance in Dyes Adsorption Opt DOI: 10.1155/2019/3017163 -
Alkyl C-H tillid 1,0
“commonlyusedmethodforparticlessizedistributionincolloidal The peak at 1399 refers to C-H stretching vibrations of the solution.”
Gupta 等 - 2018 - Effective Antimicrobial Activity o Green ZnO Nano DOI: 10.3389/fmicb.2018.02030 -
Acetate tillid 1,0
“The characteristic bands at 1720 and 1399 cm-1 were assigned to the stretching vibrations C=O and the bonding of C-OH of GO (curve a), respectively [1].”
Facile Construction of Functionalized GO Nanocomposites with Enhanced Antibacterial Activity DOI: 10.3390/nano9070913
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.