Hvad absorberer ved 1130 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1130 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 1130 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 | 13 | 12 | 1,0 |
| Methoxy (OCH3) | 11 | 10 | 1,0 |
| Methacrylate | 11 | 10 | 1,0 |
| Acetate | 11 | 10 | 1,0 |
| Alkyl C-H | 5 | 5 | 1,0 |
| Secondary amine | 4 | 4 | 1,0 |
| Amide | 4 | 4 | 1,0 |
| C c single bond | 4 | 4 | 1,0 |
| Silicon-oxygen (Si-O) | 4 | 2 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Ring structure | 3 | 3 | 1,0 |
| Aromatic ring | 3 | 2 | 1,0 |
| Silicon (Si) | 3 | 1 | 1,0 |
| S eq o | 2 | 2 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Carbon dioxide | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Fatty acid | 1 | 1 | 1,0 |
| Perchlorate | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Boron nitrogen | 1 | 1 | 1,0 |
| Metal oxygen | 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 |
|---|---|---|---|
| diamond | 1130, 1378, 1332 | Methoxy (OCH3) | 1 |
| polyaniline | 1130, 1565, 1570 | Methacrylate, Acetate | 1 |
| copolymer | 1130, 2921, 1540 | Methacrylate, Acetate | 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 1130 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
-
S eq o tillid 1,0
“The bands around 1130 and 1150cm(cid:1)1 are due to the symmetric SO stretching and SO 2”
Synergistic effect of copolymers composition on the electrochemical, thermal, and electrical behavior of 5-lithiosulphoisophthalic acid doped poly(aniline-co-2-isopropylaniline): synthesis, characterization, and applications DOI: 10.1002/pat.1359 -
Acetate tillid 1,0
“It is a well resolved peak with its maximum at 1130 resulting from asymmetric stretching vibrations of a C-O-C bond system [39].”
Mechanical properties, chemical analysis and evaluation of antimicrobial response of Si-DLC coatings fabricated on AISI 316 LVM substrate by a multi-target DC-RF magnetron sputtering method for potential biomedical applications DOI: 10.1016/j.apsusc.2017.03.223 -
Aromatic ring tillid 1,0
“modes with Olefinic and aromatic structures are associated with a broad absorption band between 1130 and 1550”
De 等 - 2011 - Fourier-Transform Infrared Absorption Study of the DOI: 10.1063/1.3605921 -
tillid 1,0
“2700-3500 has absorption bands at 1130 and 1344 due to nitrogen in hydrogen-related vibration at From the IR impurities predominantly in the form of C-center (single subspectra, we notice that the hydrogen-related modes locate at”
Fang 等 - 2016 - HPHT synthesis of N-H co-doped diamond single crys DOI: 10.1016/j.jcrysgro.2015.11.042 -
Boron nitrogen tillid 1,0
“=𝜇(1282cm-1)/𝜇(2120cm-1) × 5.5 × 16.5, out h-BN additive displayed typical yellow due to the 𝜇(1130cm-1), 𝜇(1282cm-1) 𝜇(2120cm-1) involvement of nitrogen impurities, which is inevitable where and 2120cm-1, in the synthesis cell.”
B–C Bond in Diamond Single Crystal Synthesized with h-BN Additive at High Pressure and High Temperature DOI: 10.1088/0256-307X/33/2/028101 -
tillid 1,0
“Characteristic absorption for C-centers (single substitutional N atoms).”
Li 等 - 2017 - Synthesis of n-type semiconductor diamond single c DOI: 10.1088/1757-899X/274/1/012131 -
Alkyl C-H tillid 1,0
“3 of 85PVAc:15LiClO polymer-salt complex the 4 peaksat1130,1438and1726cm-1 areascribedtoC-O-Csymν(C metric stretching, C-H bending and O) stretching vibrations of pure PVAc.”
Selvasekarapandian 等 - 2006 - Laser Raman and FTIR studies on Li+ interaction in DOI: 10.1016/j.saa.2006.02.026 -
Alkyl C-H tillid 1,0
“The negative鄄going band at 1710 is the stretching vibration peak of carboxyl group of aromatic al鄄 cm-1 dehydes, and the positive鄄going band at 1130 shows the consumption peak of methyl of toluene deriva鄄 tions.”
Zhu 等 - 2013 - Direct Electro-oxidation of Toluene Derivations on DOI: 10.7503/cjcu20121107
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.