Hvad absorberer ved 1057 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1057 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 1057 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 | 12 | 12 | 1,0 |
| Methacrylate | 10 | 10 | 1,0 |
| Acetate | 10 | 10 | 1,0 |
| Methoxy (OCH3) | 9 | 9 | 1,0 |
| Carbohydrate | 3 | 3 | 1,0 |
| Ester | 3 | 3 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Urea | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
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 1057 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
“Table 3, According to the IR data in W-DHS has characteristic peaks at 1513, 1377, 1194 and cm-1 corresponding to the characteristic peaks of TC-DHS at 1727 (C=O vibration), 1454, 1057 cm-1.”
Discrimination and similarity evaluation of tissue-cultured and wild Dendrobium species using Fourier Transform Infrared Spectroscopy DOI: 10.1016/j.molstruc.2015.01.027 -
tillid 1,0
“Another typical absorption cm-1 band of TA at 1057 is due to the stretching vibration of C-F.”
Chitosan-Coated PLGA Nanoparticles Encapsulating Triamcinolone Acetonide as a Potential Candidate for Sustained Ocular Drug Delivery DOI: 10.3390/pharmaceutics13101590 -
tillid 1,0
“N(cid:99)-(3-trimethoxysilylpropyl)diethylentriamine The synthesis of modified silica (SiO 2(RHA)-TMPDT) was cm-1 2(RHA)-TMPDT showed peaks at 1057, 1471 and 2908 confirming successfully carried out.”
Synthesis of N’-(3-trimethoxysilylpropyl)diethylentriamine modified silica (SiO2(RHA)-TMPDT) for adsorption of gold(III) DOI: 10.1063/5.0008267 -
tillid 1,0
“1631.7 Variable angle vibration of N H CONH 1057.3 Stretching vibration of C O C and C O H Pyran ring 1037.13”
Characterization of Auricularia auricula polysaccharides and its antioxidant properties in fresh and pickled product DOI: 10.1016/j.ijbiomac.2015.08.020 -
Alkyl C-H tillid 1,0
“Peaks at 1082 and vibration modes of peaks at 2958, 2931 and 2872 11 cm-1 1165 are unique to the blood spectra, whereas the are corresponding to asymmetric vibration of C-H in AnalyticalMethodsAcceptedManuscript 12 cm-1 peak at 1057 is obse”
Zou 等 - 2016 - Whole blood and semen identification using mid-inf DOI: 10.1039/C5AY03337C. -
Acetate tillid 1,0
“1277 Strong C-O stretching Aromatic ester 1057 Strong”
Evaluation of anticandidal activities and phytochemical examination of extracts prepared from DOI: 10.1186/s12906-022-03552-x -
tillid 1,0
“As a final remark, sepiolite typical vibrations (MgOH (3700-3555 cm-1), Si-O (1057 and 1000 cm-1), SiOH (976 cm-1) and MgOH (689 cm-1) [6], as shown in the spectrum in Figure S7 of the Supplementary Material) could not be identified in the”
Bugnotti 等 - 2023 - Structure of Starch-Sepiolite Bio-Nanocomposites DOI: 10.3390/polym15051207 -
Acetate tillid 1,0
“cm-1, The peaks related to C-H stretching vibration at 2901 O-H stretching vibration cm-1, at 3447 C-O stretching vibration from asymmetric oxygen bridge between 1057 cm-1, and 1113 C-O carbonyl stretching vibration from the glucose of the”
Impedance, Electrical Equivalent Circuit (EEC) Modeling, Structural (FTIR and XRD), Dielectric, and Electric Modulus Study of MC-Based Ion-Conducting Solid Polymer Electrolytes DOI: 10.3390/ma15010170
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