Amine primary — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

Amine primary 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 Amine primary

Viser de 30 bedst understøttede toppe ud af 242 i alt for Amine primary.

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

• 1649 cm⁻¹ tillid 1,0

  “In 41 cm@1 chitosan, the peaks at 1649 and 1579 are attributed to the The BC formed was removed from the fermenting container 42 amino (NH 2) and N@H bending vibrations respectively.”

  Arikibe 等 - 2019 - pH-Responsive Studies of Bacterial CelluloseChito DOI: 10.1002/slct.201902290
• 482 cm⁻¹ tillid 1,0

  “cm-1 and 1635 due to stretching vibrations of O-H group, the bands assigned at 3275 cmcm-1, - 1 the band at 2922 due to vibrations of C H stretching thee band at 1213 1062cm-1,482cm-1,576cm-1,1535cm-1arethefollowingvibrationsC-Ostretching,N”

  Bio-engineered TiO2 nanoparticles using Ledebouria revoluta extract: Larvicidal, histopathological, antibacterial and anticancer activity DOI: 10.1080/03067319.2020.1718668
• 1564 cm⁻¹ tillid 1,0

  “At the cm-1 1564 the peak is due to primary amine group N-H acid's”

  Bakan 等 - 2019 - Synthesis, characterization, toxicity and in vivo DOI: 10.1007/s10965-019-1901-7
• 1400 cm⁻¹ tillid 1,0

  “(1250cm-1),C\\Cstretchofaromaticcompounds(1400cm-1),N\\H cm-1) and carboxylic acids bends due to primary amines (1650 2.6.”

  A rapid method for fungal assisted algal flocculation: Critical parameters & mechanism insights DOI: 10.1016/j.algal.2016.10.022
• 1623 cm⁻¹ tillid 1,0

  “Because urea and ChCL intermolecular hydrogen interactions are formed, the stretching vibration of NH2 at 1662 cm-1 and the asymmetric vibration of NH2 at 1606 cm-1 in the FTIR spectra of urea shifted to 1663 and 1623 cm-1, respectively, in”

  Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569
• 3250 cm⁻¹ tillid 1,0

  “to C=O stretching and N-H stretching at 1650-1580 In addition, the third peak at 3250 related to N-H stretching for the aliphatic primary amine around 3400-3300 cm-1 and cm-1 3250 related to N-H stretching for the aliphatic primary amine ar”

  Nutritional Quality, Chemical, and Functional Characteristics of Hemp (Cannabis sativa ssp. sativa) Protein Isolate DOI: 10.3390/plants11212825
• 1637 cm⁻¹ tillid 1,0

  “The presence of N-H bent primary amines is revealed by the band at 1637 in the spectra, which corresponds to (-NH-C=O).”

  Nematicidal activity of seaweed-synthesized silver nanoparticles and extracts against Meloidogyne incognita on tomato plants DOI: 10.1038/s41598-022-06600-1
• 3407 cm⁻¹ tillid 1,0

  “shifted to higher wavenumber of 3407 Two new peaks of primary amine (N-H) were observed at cm-1”

  Solid polymer electrolyte production from 2-hydroxyethyl cellulose: Effect of NH4NO3 composition on its structural properties DOI: 10.1016/j.carbpol.2017.02.033