N eq o — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

N eq o 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 N eq o

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

• 1384 cm⁻¹ tillid 1,0

  “The band at 1384 is indicative of the N=O stretching vibration that was produced by the trace amount of nitrate [38].”

  Miri 和 Sarani - 2018 - Biosynthesis, characterization and cytotoxic activ DOI: 10.1016/j.ceramint.2018.04.063
• 1384 cm⁻¹ tillid 1,0

  “The cm-1 could be due to N=O stretching vibration indicating traces of nitrate sharp band at 1384”

  Patil 等 - 2016 - Bio-therapeutic Potential and Cytotoxicity Assessm DOI: 10.1007/s12010-016-2121-9
• 1409 cm⁻¹ tillid 1,0

  “5) showed six peaks which indicate the pres1409.02 is assigned to N=O bending nitro groups.”

  Insecticidal potency of Aspergillus terreus against larvae and pupae of three mosquito species Anopheles stephensi, Culex quinquefasciatus, and Aedes aegypti DOI: 10.1007/s11356-015-4961-1
• 838 cm⁻¹ tillid 1,0

  “The band cm-1 observed at 1277 is associated with C-N stretching, cm-1, and the two distinct bands occur at 838 and cm-1 639 related to the C-C ring and C-N=O bending,”

  Effects of polyvinylpyrrolidone on structural and optical properties of willemite semiconductor nanoparticles by polymer thermal treatment method DOI: 10.1007/s10973-018-7874-7
• 502 cm⁻¹ tillid 1,0

  “1,502cm-1 appeared due to asymmetric N=O stretch.”

  Design, Synthesis, Characterization, and Computational Studies on Benzamide Substituted Mannich Bases as Novel, Potential Antibacterial Agents DOI: 10.1155/2014/732141
• 1505 cm⁻¹ tillid 1,0

  “The peak observed at 1612 attributed to N-H bending vibrations of alkenes, primary amines, and amides, and the peak cm-1 can be attributed to N-H bending vibrations of alkenes, primary amines, and amcm-1 at 1505 can be assigned to N=O stret”

  Eucalyptus globulus and Salvia officinalis Extracts Mediated Green Synthesis of Silver Nanoparticles and Their Application as an Antioxidant and Antimicrobial Agent DOI: 10.3390/plants11081085
• 750 cm⁻¹ tillid 1,0

  “FTIR data revealed that Ery-PLGA nanoparticles' peaks at around 3650 cm-1 and 3000 cm-1, attributed to O-H stretching vibrations, at 1760 cm-1 to C=O stretch, at 1460 cm-1 assigned to C-H link, at 1400 cm-1 to N=O binding, 1180 cm-1 and 109”

  Nano-Architectonics of Antibiotic-Loaded Polymer Particles as Vehicles for Active Molecules DOI: 10.3390/app12041998
• 1490 cm⁻¹ tillid 1,0

  “The peaks at 1490 and 1313 cm-1 are attributed to the N=O stretching vibrations of the coordinated nican be assigned to Zntrate group and the nitrate ion, respectively.”

  Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process DOI: 10.3390/coatings11020183