Hvad absorberer ved 1583 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1583 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 1583 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 |
|---|---|---|---|
| Ring structure | 3 | 3 | 1,0 |
| Aromatic ring | 3 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Amine primary | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| C=n | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 0,9 |
| C c single bond | 2 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 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 |
|---|---|---|---|
| polypyrrole | 1583, 1700, 400 | Amide, Secondary amine | 1 |
| sodium alginate | 1583, 1636, 1080 | Amide | 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 1583 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
-
Silicon-oxygen (Si-O) tillid 1,0
“FTIR spectra of SiO2(RHA)-Arg shows two new peaks at 1672 and 1583 cm-1 confirming NH2 and C=O groups, respectively.”
Hastuti 等 - 2019 - Synthesis and characterization of L-Arginine modif DOI: 10.1088/1757-899X/509/1/012135 -
C=n tillid 1,0
“cm-1 cm-1 C=N, assigned to the carbonyl group, one band at 1583 was assigned to and one band at 742 belonging to the C-N bond.”
Synthesis of Nylon 6/Modified Carbon Black Nanocomposites for Application in Uric Acid Adsorption DOI: 10.3390/ma13225173 -
Carboxyl (COOH) tillid 1,0
“cm-1, 1400, 1305, 1066, and 756 Hydroxyl groups were attributed to the band 3260 spectrum for leaf extract, the major stretching frequencies were observed at 3260, 2096, whereas carbonyl stretching vibrations and asymmetric carboxylate stre”
Green Synthesis of TiO2 Nanoparticles Using Acorus calamus Leaf Extract and Evaluating Its Photocatalytic and In Vitro Antimicrobial Activity DOI: 10.3390/catal12020181 -
Ring structure tillid 1,0
“After this treatment, the band which corresponds to Py ring stretching vibration is cm-1 shifted to 1583 and tosylate bands have disappeared (Fig.”
New conductive copolymer membranes via track-etched PC templates for biological media ultra-filtration DOI: 10.1016/j.nimb.2007.08.066 -
Carboxyl (COOH) tillid 1,0
“This was also confirmed by the differences in spectrum bands: the peak shift to 1583 cm-1 (corresponding to the asymmetric and symmetric stretching of -COOassociated with carboxylic acid salts) and the significant increase in the peak inten”
Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol DOI: 10.3390/polym12040864 -
Amide tillid 1,0
“cm-1 In the FTIR spectra of AuPEG 2000-TAT-DOX, iAuPEG 2000-TAT-DOX the bands at 1676 (amide I), 1583 cm-1 (amide II) and 1392 (amide III) or 1668, 1587 and 1392 respectively are well resolved with their intensity higher than 1, meaning the”
Effect of TAT-DOX-PEG irradiated gold nanoparticles conjugates on human osteosarcoma cells DOI: 10.1038/s41598-020-63245-8 -
Ring structure tillid 1,0
“1650a, 1651b, 1655c 1,648 -NH2 scissoring, C6-NH2 stretching 1598a, 1602b, 1606cd 1,605 Purine ring vibration, -NH2 scissoring, N3-C4 stretching 1583a, 1580b, 1576c 1,579 Purine ring vibration, six membered ring deformation (C5-C6 stretchin”
Rakshit 等 - 2022 - Influence of Citrate and Phosphate on the Adsorpti DOI: 10.3389/fenvs.2022.894581 -
Ring structure tillid 1,0
“protonated water clusters [15], while the latter, observed here at 1583 on the GO dehydrated protonated water clusters [15], while the latter, observed here at 1583 cm-1 on the GO dehydrated 2 h ◦ νC=C νC=C 2 h at 150 C, was attributed as w”
Acid Properties of GO and Reduced GO as Determined by Microcalorimetry, FTIR, and Kinetics of Cellulose Hydrolysis-Hydrogenolysis DOI: 10.3390/catal10121393
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