Hvad absorberer ved 1022 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1022 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 1022 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 |
|---|---|---|---|
| C-O single bond | 17 | 16 | 1,0 |
| Methoxy (OCH3) | 12 | 12 | 1,0 |
| Methacrylate | 12 | 12 | 1,0 |
| Acetate | 12 | 12 | 1,0 |
| Hydroxyl (O-H) | 11 | 10 | 1,0 |
| Carbohydrate | 9 | 9 | 1,0 |
| Alkyl C-H | 5 | 5 | 1,0 |
| Amide | 4 | 4 | 1,0 |
| Phosphate (PO4) | 4 | 3 | 1,0 |
| C c single bond | 4 | 3 | 1,0 |
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Aromatic ring | 3 | 3 | 1,0 |
| S eq o | 3 | 2 | 1,0 |
| Methyl | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Metal oxygen | 2 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Thiol | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Thiocarbonyl | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| N n bond | 1 | 1 | 0,9 |
| N-O bond | 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 |
|---|---|---|---|
| starch | 1022, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 2 |
| Silica | 1022, 1100, 1080 | Methacrylate, Acetate | 1 |
| graphene | 1022, 1720, 2097 | Methacrylate, Acetate, C-O single bond | 1 |
| silver nanoparticles | 1022, 1636, 1631 | Methacrylate, Acetate, C-O single bond | 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 1022 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
-
Acetate tillid 1,0
“The C-O-H bending was observed at 1047 Foods2022,11,2430 14of19 and 1022 cm-1, which corresponded to the crystalline and amorphous structures of starch, respectively [22].”
Formation of Intermediate Amylose Rice Starch–Lipid Complex Assisted by Ultrasonication DOI: 10.3390/foods11162430 -
Acetate tillid 1,0
“Vol.30, No.1(2013)018103 1022cm-1 to the C-O-H bending mode.”
Characterization of Modified Tapioca Starch in Atmospheric Argon Plasma under Diverse Humidity by FTIR Spectroscopy DOI: 10.1088/0256-307X/30/1/018103 -
Amide tillid 1,0
“The band at 1022.27 can be assigned to medium C-N stretching vibrations of amines signifying the presence of amino acid.”
Characterization, Antimicrobial and Antioxidant Evaluation of Biofabricated Silver Nanoparticles from Endophytic Pantoea anthophila DOI: 10.1007/s10904-021-01974-7 -
Carbohydrate tillid 1,0
“The IR cm(cid:1)1 absorbance band at 1047 was susceptible to ordered or crystalline structure cm(cid:1)1 and the band at 1022 was related to amorphous structure in starch, and at cm(cid:1)1 which was responsive to water [37].”
Interactions between polyols and wheat biopolymers in a bread model system fortified with inulin: A Fourier transform infrared study DOI: 10.1016/j.heliyon.2018. -
Carbohydrate tillid 1,0
“The pair of bands resolved near 1022 and cm-1 cm-1 1048 corresponds to the 1017 mode observed in phthaloyl starch.”
Ternary Natural Deep Eutectic Solvent (NADES) Infused Phthaloyl Starch as Cost Efficient Quasi-Solid Gel Polymer Electrolyte DOI: 10.1016/j.carbpol.2017.03.023 -
Water (H2O) tillid 1,0
“In many studies, infrared spectroscopy has been used to determine the amount of ordered or crystalline domains by evaluFor casting starch films containing iodine (iodine:potassium atingtheabsorbanceintensitiesat1047and1022cm-1.Thesignal iod”
Singh 等 - 2009 - The effects of iodine on kidney bean starch Films DOI: 10.1016/j.ijbiomac.2009.04.006 -
Acetate tillid 1,0
“C-O-C glycoside 1103 glycoside ether mainly hemicellulose Dokken and Davis (2007) C-C, C-O C-OH stretching 1022, 1047, Stretching vibration of of alcohic groups and carboxylic Sene et al.”
Toan 等 - 2017 - Salicylic acid-induced accumulation of biochemical DOI: 10.1080/17429145.2017.1291859 -
Ring structure tillid 1,0
“cm-1 the silicon-oxy compounds The last band peaks was located at 1022, 827, and 752 for methylene (> CH 2) as saturated aliphatic in form of cyclohexane ring vibrations and the last two from an aromatic ring, (aryl)58.”
Silica and graphene mediate arsenic detection in mature rice grain by a newly patterned current–volt aptasensor DOI: 10.1038/s41598-021-94145-0
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