Anhydride — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor Anhydride har tendens til at absorbere, samlet fra offentliggjort litteratur og rangeret efter understøttende evidens. Hver tildeling kan spores til en kilde (DOI) og er krydsvalideret mod vores 320,000+ referencespektrer og vidensgraf.
Understøttet af 8 citerede kilder
Hurtigt svar
Anhydride 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 Anhydride
| Bølgetal (cm⁻¹) | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 1780 | 3 | 3 | 1,0 |
| 1784 | 2 | 2 | 1,0 |
| 1770 | 2 | 2 | 1,0 |
| 1850 | 2 | 2 | 1,0 |
| 699 | 1 | 1 | 1,0 |
| 1590 | 1 | 1 | 1,0 |
| 1852 | 1 | 1 | 1,0 |
| 1074 | 1 | 1 | 1,0 |
| 1765 | 1 | 1 | 1,0 |
| 1159 | 1 | 1 | 1,0 |
| 1777 | 1 | 1 | 1,0 |
| 1637 | 1 | 1 | 1,0 |
| 1546 | 1 | 1 | 1,0 |
| 1653 | 1 | 1 | 1,0 |
| 550 | 1 | 1 | 1,0 |
| 1810 | 1 | 1 | 1,0 |
| 1434 | 1 | 1 | 1,0 |
| 1701 | 1 | 1 | 1,0 |
| 1754 | 1 | 1 | 1,0 |
| 1033 | 1 | 1 | 1,0 |
| 730 | 1 | 1 | 1,0 |
| 1761 | 1 | 1 | 1,0 |
| 1791 | 1 | 1 | 1,0 |
| 1280 | 1 | 1 | 1,0 |
| 2363 | 1 | 1 | 1,0 |
| 618 | 1 | 1 | 1,0 |
| 1501 | 1 | 1 | 1,0 |
| 1858 | 1 | 1 | 1,0 |
| 1786 | 1 | 1 | 1,0 |
| 3266 | 1 | 1 | 1,0 |
Viser de 30 bedst understøttede toppe ud af 45 i alt for Anhydride.
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
-
1710 cm⁻¹ tillid 1,0
“and at 1009 However, that of NR/PS-g-MA (with polystyrene, 6/4) peaks of maleic anhydride at 1710 showed only low intensity of the absorption peak.”
Efficiency of maleic anhydride-modified polystyrene/natural rubber blends as sand aggregate binder DOI: 10.1063/5.0015717 -
1002 cm⁻¹ tillid 1,0
“cm-1, At 1002 the peak shows CO-O-CO stretching, which indicates the presence of an anhydride group.”
Extraction and Chemical Characterization of Humic Acid from Nitric Acid Treated Lignite and Bituminous Coal Samples DOI: 10.3390/su13168969 -
1220 cm⁻¹ tillid 1,0
“The genband at 1220 which is attributed to a five membered eral procedure for esterification of poly(styrene maleic cyclic anhydride (Bellamy, 1975).”
Sugar-linked biodegradable polymers: Regio-specific ester bonds of glucose hydroxyls in their reaction with maleic anhydride functionalized polystyrene and elucidation of the polymer structures formed DOI: 10.1016/j.carbpol.2006.06.035 -
1859 cm⁻¹ tillid 1,0
“LLM confirmed rule peak-group candidate”
Spectroscopic Stuides on the Liquid Crystal Alignment Mechanism for Polarized UV-Exposed Organosoluble 6FDA-TFMB Polyimide Films DOI: 10.1080/10587250108028259 -
1780 cm⁻¹ tillid 1,0
“Two small peaks at 1780 and 1856cm-' are cyclic anhydride peaks caused by the BTDA, which is present in a slight stoichiometric excess 17 LIQUID CRYSTAL ALIGNMENT A b S 0 r b a n 2014 C e October 1200 1400 1800 1600 1000 28 W ers avenumb 05”
Polarized Infrared Spectroscopic Studies of Polarized UV-exposed Polyimide Films for Liquid Crystal Alignment DOI: 10.1080/10587259808025380 -
618 cm⁻¹ tillid 1,0
“The peaks at cm-1 cm-1 618 and 638 due to the stretching vibration of Co-O-Co (or Mn-O-Mn)”
Control of magnetic properties and band gap by Co/Mn ordering and oxygen distributions of La 2 CoMnO 6 DOI: 10.1016/j.jmmm.2017.03.040 -
2363 cm⁻¹ tillid 1,0
“The bands that appear in the range 1148-1464 occur as a result of Metal-Oxygen-Metal (M-O-M) such 14 cm-1 as Fe-O-Fe and Co-O-Co [28].The presence of CO is evident by the observation of the band at 2363 15 2”
Effect of heat-treatment on the magnetic and optical properties of Sr0.7Al0.3Fe11.4Mn0.6O19 DOI: 10.1088/2053-1591/aad1e5 -
1280 cm⁻¹ tillid 1,0
“of the first peak decreases greatly from 179.0 to 880cm(cid:3)1) peaks (1280, 1080, and are attributed to phosphoric Theresiduesafter theconecalorimeter testwereexaminedfor species.[21] (--O)-O-P) anhydride (P changes in char appearance by”
Synergistic effects of ferric pyrophosphate (FePP) in intumescent flame‐retardant polypropylene DOI: 10.1002/pat.1590
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