Imide — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor Imide har tendens til at absorbere, samlet fra publiceret litteratur og rangeret efter understøttende bevis. Hver tildeling kan spores til en kilde (DOI) og krydsvalideres mod vores 130.000+ referencespektre og vidensgraf.
Backed by 8 cited sources
Hurtigt svar
Imide tildeles normalt ved at lede efter en tilbagevendende klynge af karakteristiske toppe frem for et præcist lærebogsnummer. Tabellen nedenfor viser, hvor litteraturen oftest placerer denne gruppe i FTIR, rangeret efter akkumuleret evidens.
Karakteristiske FTIR-toppe for Imide
| Bølgetal (cm⁻¹) | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 1778 | 5 | 3 | 1,0 |
| 1700 | 3 | 3 | 1,0 |
| 1702 | 3 | 2 | 1,0 |
| 1733 | 3 | 1 | 1,0 |
| 1715 | 3 | 1 | 1,0 |
| 1772 | 2 | 2 | 1,0 |
| 1779 | 2 | 2 | 1,0 |
| 1722 | 2 | 2 | 1,0 |
| 1717 | 2 | 2 | 1,0 |
| 1774 | 2 | 2 | 1,0 |
| 1501 | 2 | 2 | 1,0 |
| 1720 | 2 | 2 | 0,9 |
| 1380 | 2 | 1 | 1,0 |
| 1770 | 2 | 1 | 1,0 |
| 1783 | 2 | 1 | 0,9 |
| 1710 | 1 | 1 | 1,0 |
| 1705 | 1 | 1 | 1,0 |
| 691 | 1 | 1 | 1,0 |
| 692 | 1 | 1 | 1,0 |
| 2989 | 1 | 1 | 1,0 |
| 1775 | 1 | 1 | 1,0 |
| 720 | 1 | 1 | 1,0 |
| 905 | 1 | 1 | 1,0 |
| 1714 | 1 | 1 | 1,0 |
| 828 | 1 | 1 | 1,0 |
| 1782 | 1 | 1 | 1,0 |
| 1703 | 1 | 1 | 1,0 |
| 1695 | 1 | 1 | 1,0 |
| 834 | 1 | 1 | 1,0 |
| 1736 | 1 | 1 | 1,0 |
Viser de 30 bedst understøttede toppe ud af 56 i alt for Imide.
Mulige materialer
Spektrumlogik
En funktionel gruppetildeling bliver mere sikker, når flere forventede bånd optræder sammen. Brug denne side til at finde de bedst understøttede peaks, og bekræft derefter, at den samme prøve udviser et sammenhængende mønster snarere end et enkelt isoleret hit.
Anvendelse i virkeligheden
Disse sider er nyttige til analyse af ukendte materialer, topforklaring i rapporter, polymerfejlfinding og verifikation af, om en kandidatmaterialefamilie er kemisk plausibel.
Almindelige fejl
- Brug af én funktionel-gruppe-side som en komplet materialebedømmelse uden at kontrollere resten af spektret.
- Antager, at det stærkeste bånd altid er det mest diagnostiske.
- At glemme, at forarbejdning, tilsætningsstoffer, ældning og blandinger kan flytte eller udvide forventede toppe.
Verifikationsrådgivning
Brug DSC, GC-MS eller TGA, når flere materialefamilier deler lignende bånd, eller når blandings-effekter gør FTIR-tildelingen usikker.
Litteratur bag disse tildelinger
-
1722 cm⁻¹ tillid 1,0
“All band at position 1722 these changes may be due to the partial destruction at the imide and aromatic sites and carbonization of the implanted layer of Kapton-H.”
Chhokkar 等 - 2020 - Electrical and Structural Characterization of 100 DOI: 10.1063/5.0023335 -
1779 cm⁻¹ tillid 1,0
“the unaged CBR 320/328 composites reveal three imide carbonyl peaks at 1779, 1728 and 1712 These peaks may be assigned to the symmetric and asymmetric stretches of an unsaturated imide (1779 and 1728 cm(cid:2)1)”
Fox 等 - 2004 - Investigation of failure mechanisms in aged aerosp DOI: 10.1016/j.engfailanal.2003.05.010 -
1501 cm⁻¹ tillid 1,0
“1376-cm(cid:2)1 the imide band normalized to the 1501gion.”
Studies on the photodegradation of polarized UV-exposed PMDA-ODA polyimide films DOI: 10.1002/app.11315 -
1724 cm⁻¹ tillid 1,0
“hr, the 1 in 2(b), shown Figure after hard baking at 275°C for As 1724 characteristic imide peaks appeared at 1780, and 1375cm-I.”
Ha 等 - 1998 - Polarized Infrared Spectroscopic Studies of Polari DOI: 10.1080/10587259808025380 -
1778 cm⁻¹ tillid 1,0
“1H FT-IR spectrum of this aromatic copolyanalyzing the NMR spectrum of imide (Figure 5) presents imide carbonyl PAA-A, the conclusion is drawn that a cm(cid:2)1, peaks at around 1778 and 1723 singlet at 6.63 ppm is assigned to the and -NHCO”
Preparation of Poly(amic acid) and Polyimide via Microwave-Assisted Polycondensation of Aromatic Dianhydrides and Diamines DOI: 10.1002/masy.200850120 -
3172 cm⁻¹ tillid 1,0
“that could not be assigned to known elements and do not The amide peaks at 3314, 3259, 2079(broad), 1567, and cmL1and correspondtoanyotherprimaryelementpeak.The10.8eV, the imide peaks at 3172 (broad), 1953, and 1541 HL(1/4)”
Mills 等 - 2009 - Commercializable power source from forming new sta DOI: 10.1016/j.ijhydene.2008.10.018 -
738 cm⁻¹ tillid 1,0
“explicit assignment”
Purushothaman 和 Bilal - 2014 - Development and characterization of homo, co and t DOI: 10.1515/polyeng-2013-0167 -
400 cm⁻¹ tillid 1,0
“peaks between 400 and 700 Due to the conversion of a secondary amine into a stable cm-1 imide (C=N) bond, AF exhibits the majority of its characteristic peaks at 1640 [76].”
Molecularly Targeted Photothermal Ablation of Epidermal Growth Factor Receptor-Expressing Cancer Cells with a Polypyrrole–Iron Oxide–Afatinib Nanocomposite DOI: 10.3390/cancers14205043
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